This paper presented the current status quo of hybrid rice in India from the breeding,seed production and extension and the existing problems and barriers,based on which the corresponding countermeasures were put forw...This paper presented the current status quo of hybrid rice in India from the breeding,seed production and extension and the existing problems and barriers,based on which the corresponding countermeasures were put forward.展开更多
This article reviews the history and progress of hybrid rice development. Hybrid rice research was initiated back in 1964, and commercialized in 1976. Three-line and two-line system hybrid rice were developed in 1974 ...This article reviews the history and progress of hybrid rice development. Hybrid rice research was initiated back in 1964, and commercialized in 1976. Three-line and two-line system hybrid rice were developed in 1974 and 1995, respectively. Research on super hybrid rice, which was first launched by Ministry of Agriculture, China in 1996, is discussed, and the great progress of super hybrid rice had been achieved with a new yield record by 15.4 t ha^-1 in the 6.84 ha demonstration location in Xupu, Hunan Province, China in 2014. And the mechanism of heterosis, the techniques of hybrid seed production and the modern field managements in hybrid rice over the past decades are also discussed. Additionally, this article dealt with the intellectual property protection(IPR) and development of hybrid rice seed industry in China. Major factors that constrain hybrid rice development are analyzed and possible solutions to this problems are proposed. Finally, the authors present methods to further increase production yield, and propose an improvement for breeding super high-yielding hybrid rice based on these methods.展开更多
Rice is the staple food for more than half of the world's population and for more than 60% of China population. Increasing rice yield is therefore crucial for solving food shortage problem, ensuring food secruity, an...Rice is the staple food for more than half of the world's population and for more than 60% of China population. Increasing rice yield is therefore crucial for solving food shortage problem, ensuring food secruity, and reducing poverty. Given the vast population and limited per capita cultivated land in China, meeting food demands by increasing the yield per unit area with the aid of advanced sciences and technologies would be the only option. Several alternative measures for increasing crop yield, such as building water conservancy facilities, increasing fertilizer application, improving soil texture, forming interrelated cultivation techniques, more effective controlling of pests and diseases, and using of elite varieties, have been undertaken. Among these alternative measures, adopting elite varieties, particularly popularizing super hybrid rice, proves to be the most economical and effective option.展开更多
Rice production, hybrid rice development, breeding, production of hybrid seeds, and popularization condition were introduced in this study. The chief obstacles preventing hybrid rice from growing have been found and t...Rice production, hybrid rice development, breeding, production of hybrid seeds, and popularization condition were introduced in this study. The chief obstacles preventing hybrid rice from growing have been found and the concerned countermeasures were put forward.展开更多
The purpose of this study was to identify the existing rice breeding programs in Myanmar and to determine researchers' attitudes on hybrid rice research mid its determinmlts. A sample consists of 56 researchers who a...The purpose of this study was to identify the existing rice breeding programs in Myanmar and to determine researchers' attitudes on hybrid rice research mid its determinmlts. A sample consists of 56 researchers who are working in Department of Agricultural Research, Department of Agriculture and Yezin Agricultural University, and involving varietal development of hybrid rice. The research instruments were a questionnaire used by 4 points Likert scale of strongly agree, agree, less agree and not agree to measure on researchers' attitudes towards 14 determinants of varietal development of hybrid rice production. The study revealed that the average age of the researchers was 46.5 years ranged from 25 to 60 years. The majority of researchers were 51-60 years old (41.1%). The working experience of researchers ranged from 5 to 36 years and the metal of their experience was 20 years. The educational level was Ph.D. (35.7%), M.Agr.Sc. (26.8%), and B.Agr.Sc. (37.5%). Majority of researchers were female (76.8%) and 58.9% were rice breeders. Moreover, 48.2% of researchers obtained the hybrid rice technology from breeding training and the researchers who believed in their current breeding works were 51.8%. Among 33 rice breeders, 72.7% of the rice breeders applied only convention breeding method. In addition, researchers' opinions on farmer's perception of hybrid rice technology, 60.7% of the researchers agreed on inferior grain quality and 73.2% of researchers strongly agreed on not stable market. This study found out more thin1 half of the researchers strongly agreed on 10 out of 14 determinmlts such as poor infrastructure, low human resource development, parental problem, insufficient experience, limit germplasm resource, limit research facilities, no incentive for breeders, weak public-private partnership, fewer quality breeders and not enough research fund. Moreover, half of the researchers agreed on 3 determinants likely need special technical training, need international assistance and climate change challenges. Finally, development of hybrid rice research in Mymlmar, there will be needed international assistmlce, and upgraded to hybrid rice research center from currently hybrid rice research section and need integrated hybrid rice policy supported by government.展开更多
The research designed four application quantities of 0, 2 250, 4 500 and 6 750 g/hm2 based on Liangyou No. 959 to explore the effects of microbial inocu- lure fertilizer on growth and yield of super hybrid rice. The r...The research designed four application quantities of 0, 2 250, 4 500 and 6 750 g/hm2 based on Liangyou No. 959 to explore the effects of microbial inocu- lure fertilizer on growth and yield of super hybrid rice. The results indicate that the treatment with traditional fertilizers and 4 500 g/hm2 HYT microbial inoculum fertilizer performed the best, where average number of tiller was 2.4 more than that of the control; the number of effective ear was 11.05% higher; yield increased by 10.3%. These have demonstrated that microbial inoculum fertilizer is of great value in pro- motion on super hybrid rice production.展开更多
In this paper,status quo of development in Zhenjiang Wanshan Hongbian Modern Agricultural Science Park is studied,and some problems are pointed out,such as unreasonable staffing structure and weak self-financing abili...In this paper,status quo of development in Zhenjiang Wanshan Hongbian Modern Agricultural Science Park is studied,and some problems are pointed out,such as unreasonable staffing structure and weak self-financing ability.Talent introduction strategy and branding and standardization strategy are proposed,and financing channels should be widened.Meanwhile,agricultural production structure should be adjusted,and science and technology services should be promoted.The research aims to provide the reference for sustainable development of similar modern agricultural science park in China.展开更多
Burundi, a landlocked country locked near the equator, is one of the least developed countries confirmed by the United Nations and the 60% financial revenue needs aid. Rice is the most important and extravagant food i...Burundi, a landlocked country locked near the equator, is one of the least developed countries confirmed by the United Nations and the 60% financial revenue needs aid. Rice is the most important and extravagant food in Burundian consumption for no more than 5 kg on average per people by year. It's especially suitable to plant rice in Burundi because of the sufficient sunlight and rain. But the lack of new varieties, practical technology and modern service make it very difficult for rice production. According to this significant roll, the rice production has to be increased in order to satisfy the consumption needs which are now becoming higher and keep the food safe. This article mainly shows the rice ecological types, production facts and the major constraints of rice production in Burundi, and then look into the distance on how to solve the problems.展开更多
Based on the research on the relevant background and significance of the sustainable development of agricultural cultural heritage,taking Wannian rice cultivation culture system as an example and its natural environme...Based on the research on the relevant background and significance of the sustainable development of agricultural cultural heritage,taking Wannian rice cultivation culture system as an example and its natural environment,traditional agricultural production activities,unique cultural patterns,socio-economic development and protection,and protection and development approach as the basis for evaluation,an evaluation index system for the sustainable development of Wannian rice cultivation culture system was constructed.Each index was quantified and standardized,and their weight was determined through the analytic hierarchy process to obtain the comprehensive evaluation value of the sustainable development of Wannian rice cultivation culture system.The evaluation value was analyzed to propose the main issues in the sustainable development of Wannian rice cultivation culture.展开更多
The study introduced protected agriculture development in Qinghai province and concluded its development scale, type and structure, as well as technology supports. Besides, existing problems were proposed such as lowe...The study introduced protected agriculture development in Qinghai province and concluded its development scale, type and structure, as well as technology supports. Besides, existing problems were proposed such as lower production-level, poor equipment, fewer specialized bases, and countermeasures include the following: leading protected agriculture development by macro-control; strengthening market supervision; improving scientific research and innovation to help S & T achievement transformation.展开更多
[Objective] The aim was to make analysis on natural condition,present situation,and potential of rice production development in Angola.[Method] Conclusion and analysis of rice development in Angola were conducted from...[Objective] The aim was to make analysis on natural condition,present situation,and potential of rice production development in Angola.[Method] Conclusion and analysis of rice development in Angola were conducted from natural condition,production status,present problem and development potential.[Result] In Angola,about 30 million hectares agricultural lands enjoy fresh water,temperature,and light resources which are requirement for rice development.Presently,however,some disadvantages have harassed the nation,such as outdated production mode and technology,small cultivated area and low level of per unit yield.In addition,about 98% of consumed rice was imported from other countries.The government has attached high importance to food production,and rice production was a priority of national investment.Per unit rice yield would achieve 7 500 kg/hm2 if Angola introduces hybrid rice species and high-yield cultivation techniques from China.[Conclusion] The research provided technical reference for enterprises or individuals ready to invest in rice development in Angola.展开更多
With the rapid development of its national economy,China has become a major producer and consumer of energy.To guarantee the sustainable development of power industry and national economy,China should exploit fossil a...With the rapid development of its national economy,China has become a major producer and consumer of energy.To guarantee the sustainable development of power industry and national economy,China should exploit fossil and renewable energy efficiently according to the development situation of generation resources.Firstly,this paper analyzes the utilization status of main generation resources in China,such as coal,hydropower and wind energy.Secondly,this paper illustrates the STEP model,which analyzes some issues for China’s generation resource utilization from political,economic,social and technological aspects.For example,the resource distribution is inconsistent with electricity demand,the renewable energy power output is intermittent,and there is some disruption in coal mining.Finally,combined with the utilization status and issues,this paper presents some improvement approaches from the perspectives of cost,efficiency and external influence.展开更多
Traditional farming practices conform to sustainable rural livelihoods, while agricultural modernisation tends to undermine these practices through various perturbations. A case study in Tengchong County (western Yunn...Traditional farming practices conform to sustainable rural livelihoods, while agricultural modernisation tends to undermine these practices through various perturbations. A case study in Tengchong County (western Yunnan, China) shows that transformation of traditional alder (Alnus nepalensis) and dry rice (upland rice) rotational farming to introduced Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations leads to localised water scarcity and soil fertility decline. While farmers are aware of ecological sustainability of traditional farming, they prefer Chinese fir forestry because it is less labour-intensive, has a high market value, and releases time for profitable off-farm work. Farmers adapt to economic liberalization by planting high value crops and trees. However, alternatives to make local agricultural production more profitable through competitive business strategies, cooperative approaches, innovations in integrating high value crops and 'downstream' processingfor sustainable rural livelihoods have been overlooked largely due to poor information availability and lack of organisational framework.展开更多
In the study,the connotation and objectives of agricultural cleaner production were introduced firstly,and then the development status of agricultural cleaner production in China was analyzed,and the problems existing...In the study,the connotation and objectives of agricultural cleaner production were introduced firstly,and then the development status of agricultural cleaner production in China was analyzed,and the problems existing in the development of agricultural cleaner production were pointed out.From the strategy of agricultural sustainable development,the necessity and feasibility of implementing agricultural cleaner production in China were discussed.Finally,some related countermeasures were put forward according to the problems existing in the development of agricultural cleaner production,so as to provide theoretical references for the realization of agricultural sustainable development in China.展开更多
As maternal parents, diploid (L202-2x) and autotetraploid (L202-4x) of Oryza sativa cv. L2O2 were crossed with O. officinalis. Embryo development and fertilization in these two crosses were comparatively studied. ...As maternal parents, diploid (L202-2x) and autotetraploid (L202-4x) of Oryza sativa cv. L2O2 were crossed with O. officinalis. Embryo development and fertilization in these two crosses were comparatively studied. There were no mature hybrid seeds obtained because all the hybridized spikelets died 30 days after pollination. The main reasons for no seed set were abnormal fertilization and development of the embryos and endosperms in the interspecific hybrids. There were doublefertilization, egg cell single-fertilization and non-fertilization in these crosses. Although 59.45% and 54.87% of hybrid embryos produced in the crosses of L202-2x/O. officinalis and L202-4x/O. officinalis, respectively, hybrid embryos ceased to develop or degenerated and plenty of free endosperm nuclei were in disaggregating state without developing cellular endosperms three days after pollination. Besides, some embryological differences in these two crosses were found, that is, the rate of double-fertilization and total rate of doubleand single-fertilization in L202-2x/O. officinalis were higher than those in L202-4x/O. officinalis. The embryo and endosperm of hybrids developed more slowly, and embryos and free endosperm nuclei were more severely degenerated in L202-4x/O. officinalis than in L202-2x/O. officinalis. Five days after pollination, a few of embryos in L202-2x/O. officinalis developed into pear-shaped ones, however, embryos in L202-4x/O. officinalis were all degenerated. Therefore, it is more difficult to obtain interspecific hybrids by wide crosses between autotetraploid of O. sativa and O. officinalis.展开更多
s: The current status of AEE in Hunan Province is introduced in brief. The reasons why the AEE was polluted and destroyed are analyzed; the countermeasures for improving AEE are brought forward.
Background:Since the declaration of the Millennium Development Goals(MDGs)in 1990,many countries of the Middle East and North Africa(MENA)region made some improvements in maternal and child health and in tackling comm...Background:Since the declaration of the Millennium Development Goals(MDGs)in 1990,many countries of the Middle East and North Africa(MENA)region made some improvements in maternal and child health and in tackling communicable diseases.The transition to the global agenda of Sustainable Development Goals brings new opportunities for countries to move forward toward achieving progress for better health,well-being,and universal health coverage.This study provides a profile of health status and health financing approaches in the MENA region and their implications on universal health coverage.Methods:Time-series data on socioeconomics,health expenditures,and health outcomes were extracted from databases and reports of the World Health Organization,the World Bank and the United Nations Development Program and analyzed using Stata 12 statistical software.Countries were grouped according to the World Bank income categories.Descriptive statistics,tables and charts were used to analyze temporal changes and compare the key variables with global averages.Results:Non-communicable diseases(NCDs)and injuries account for more than three quarters of the disabilityadjusted life years in all but two lower middle-income countries(Sudan and Yemen).Prevalence of risk factors(raised blood glucose,raised blood pressure,obesity and smoking)is higher than global averages and counterparts by income group.Total health expenditure(THE)per capita in most of the countries falls short of global averages for countries under similar income category.Furthermore,growth rate of THE per capita has not kept pace with the growth rate of GDP per capita.Out-of-pocket spending(OOPS)in all but the high-income countries in the group exceeds the threshold for catastrophic spending implying that there is a high risk of households getting poorer as a result of paying for health care.Conclusion:The alarmingly high prevalence of NCDs and injuries and associated risk factors,health spending falling short of the GDP and GDP growth rate,and high OOPS pose serious challenges for universal health coverage.Using multi-sector interventions,countries should develop and implement evidence-informed health system financing roadmaps to address these obstacles and move forward toward universal health coverage.展开更多
With the increasingly deepened sustainable development concept in China, the logistics industry is undergoing transformation toward green logistic, requiring relevant logistics companies to fully strengthen green logi...With the increasingly deepened sustainable development concept in China, the logistics industry is undergoing transformation toward green logistic, requiring relevant logistics companies to fully strengthen green logistics management to accelerate the sustainable development of the logistics industry. This paper is focused on the analysis of green logistics management in the context of sustainable development. The meaning of green logistics management is firstly introduced, and then the importance of green logistics management is discussed. According to the current status of green logistics management, this paper proposes relevant management countermeasures, hoping to provide relevant personnel with certain reference.展开更多
The meiotic stage of pollen mother cell is a very important stage in controlling the development and formation of pollen. In order to clone the rice cDNA(s) of this stage, a normal rice, Annong N and its thermosensiti...The meiotic stage of pollen mother cell is a very important stage in controlling the development and formation of pollen. In order to clone the rice cDNA(s) of this stage, a normal rice, Annong N and its thermosensitive mutant, Annong S-1 were used as the plant material. The mRNA has been extracted from the young panicle at the meiotic stage. By using the cDNA subtraction hybridization technique, three cDNA fragments, RP-1, RP-2 and RP-3 have展开更多
基金Supported by the Scientific Cooperation Project of the Ministry of Science and Technology Innovation of Malaysia (07-04-01PB015)~~
文摘This paper presented the current status quo of hybrid rice in India from the breeding,seed production and extension and the existing problems and barriers,based on which the corresponding countermeasures were put forward.
基金supported by the National Natural Science Foundation of China(31271659)the Key Technologies R&D Program of China during the 12th Five-Year Plan period(2012BAD04B10 2011BAD16B01, 2013BAD07B14)
文摘This article reviews the history and progress of hybrid rice development. Hybrid rice research was initiated back in 1964, and commercialized in 1976. Three-line and two-line system hybrid rice were developed in 1974 and 1995, respectively. Research on super hybrid rice, which was first launched by Ministry of Agriculture, China in 1996, is discussed, and the great progress of super hybrid rice had been achieved with a new yield record by 15.4 t ha^-1 in the 6.84 ha demonstration location in Xupu, Hunan Province, China in 2014. And the mechanism of heterosis, the techniques of hybrid seed production and the modern field managements in hybrid rice over the past decades are also discussed. Additionally, this article dealt with the intellectual property protection(IPR) and development of hybrid rice seed industry in China. Major factors that constrain hybrid rice development are analyzed and possible solutions to this problems are proposed. Finally, the authors present methods to further increase production yield, and propose an improvement for breeding super high-yielding hybrid rice based on these methods.
文摘Rice is the staple food for more than half of the world's population and for more than 60% of China population. Increasing rice yield is therefore crucial for solving food shortage problem, ensuring food secruity, and reducing poverty. Given the vast population and limited per capita cultivated land in China, meeting food demands by increasing the yield per unit area with the aid of advanced sciences and technologies would be the only option. Several alternative measures for increasing crop yield, such as building water conservancy facilities, increasing fertilizer application, improving soil texture, forming interrelated cultivation techniques, more effective controlling of pests and diseases, and using of elite varieties, have been undertaken. Among these alternative measures, adopting elite varieties, particularly popularizing super hybrid rice, proves to be the most economical and effective option.
基金Supported by Cooperation Project of Science and Technology Innovation Ministry of Malaysia.(07-04-01PB015)~~
文摘Rice production, hybrid rice development, breeding, production of hybrid seeds, and popularization condition were introduced in this study. The chief obstacles preventing hybrid rice from growing have been found and the concerned countermeasures were put forward.
文摘The purpose of this study was to identify the existing rice breeding programs in Myanmar and to determine researchers' attitudes on hybrid rice research mid its determinmlts. A sample consists of 56 researchers who are working in Department of Agricultural Research, Department of Agriculture and Yezin Agricultural University, and involving varietal development of hybrid rice. The research instruments were a questionnaire used by 4 points Likert scale of strongly agree, agree, less agree and not agree to measure on researchers' attitudes towards 14 determinants of varietal development of hybrid rice production. The study revealed that the average age of the researchers was 46.5 years ranged from 25 to 60 years. The majority of researchers were 51-60 years old (41.1%). The working experience of researchers ranged from 5 to 36 years and the metal of their experience was 20 years. The educational level was Ph.D. (35.7%), M.Agr.Sc. (26.8%), and B.Agr.Sc. (37.5%). Majority of researchers were female (76.8%) and 58.9% were rice breeders. Moreover, 48.2% of researchers obtained the hybrid rice technology from breeding training and the researchers who believed in their current breeding works were 51.8%. Among 33 rice breeders, 72.7% of the rice breeders applied only convention breeding method. In addition, researchers' opinions on farmer's perception of hybrid rice technology, 60.7% of the researchers agreed on inferior grain quality and 73.2% of researchers strongly agreed on not stable market. This study found out more thin1 half of the researchers strongly agreed on 10 out of 14 determinmlts such as poor infrastructure, low human resource development, parental problem, insufficient experience, limit germplasm resource, limit research facilities, no incentive for breeders, weak public-private partnership, fewer quality breeders and not enough research fund. Moreover, half of the researchers agreed on 3 determinants likely need special technical training, need international assistance and climate change challenges. Finally, development of hybrid rice research in Mymlmar, there will be needed international assistmlce, and upgraded to hybrid rice research center from currently hybrid rice research section and need integrated hybrid rice policy supported by government.
基金Supported by National Natural Science Foundation of China(31301264)National Science and Technology Project for Food Production(Hunan)(2011BAD16B01,2012BAD04B10,2013BAD07B11)+3 种基金High-yield and Hich-tech Research and Demonstration of Two-line Hybrid Rice(2012BAD07B02)Integration of Water and Fertilizer Optimized Management Technology Research in the High-yield Rice Area in the Yangtze River(2013BAD07B14/4)Demonstration and Application of Spectrum Detection Technology System of Rice Production in Double-Cropping Ricein Hunan Province(201303109-3)China Special Fund for Meteorological Research in the Public Interest(GYHY201206020)~~
文摘The research designed four application quantities of 0, 2 250, 4 500 and 6 750 g/hm2 based on Liangyou No. 959 to explore the effects of microbial inocu- lure fertilizer on growth and yield of super hybrid rice. The results indicate that the treatment with traditional fertilizers and 4 500 g/hm2 HYT microbial inoculum fertilizer performed the best, where average number of tiller was 2.4 more than that of the control; the number of effective ear was 11.05% higher; yield increased by 10.3%. These have demonstrated that microbial inoculum fertilizer is of great value in pro- motion on super hybrid rice production.
文摘In this paper,status quo of development in Zhenjiang Wanshan Hongbian Modern Agricultural Science Park is studied,and some problems are pointed out,such as unreasonable staffing structure and weak self-financing ability.Talent introduction strategy and branding and standardization strategy are proposed,and financing channels should be widened.Meanwhile,agricultural production structure should be adjusted,and science and technology services should be promoted.The research aims to provide the reference for sustainable development of similar modern agricultural science park in China.
基金The Aid Project on Science and Technology to the Developing Countries from the Ministry of Science and Technology of the PRC:Research Cooperation for key technologies to improve food production in Africa,Guangxi Scientific Research and Technology Development Project(No.10100020-1,1346009-4,14125007-2-7)Fundamental Research Funds for the GXAAS(2014YZ38)~~
文摘Burundi, a landlocked country locked near the equator, is one of the least developed countries confirmed by the United Nations and the 60% financial revenue needs aid. Rice is the most important and extravagant food in Burundian consumption for no more than 5 kg on average per people by year. It's especially suitable to plant rice in Burundi because of the sufficient sunlight and rain. But the lack of new varieties, practical technology and modern service make it very difficult for rice production. According to this significant roll, the rice production has to be increased in order to satisfy the consumption needs which are now becoming higher and keep the food safe. This article mainly shows the rice ecological types, production facts and the major constraints of rice production in Burundi, and then look into the distance on how to solve the problems.
基金Sponsored by Social Science Planning Project of Jiangxi Province(19YS06)Science and Technology Project of Education Department of Jiangxi Province(GJJ190196)+1 种基金Basic Education Research Project of Jiangxi Province(SZUNDZH2020-1138)Culture and Art Science Planning Project of Jiangxi Province(YG2021134)。
文摘Based on the research on the relevant background and significance of the sustainable development of agricultural cultural heritage,taking Wannian rice cultivation culture system as an example and its natural environment,traditional agricultural production activities,unique cultural patterns,socio-economic development and protection,and protection and development approach as the basis for evaluation,an evaluation index system for the sustainable development of Wannian rice cultivation culture system was constructed.Each index was quantified and standardized,and their weight was determined through the analytic hierarchy process to obtain the comprehensive evaluation value of the sustainable development of Wannian rice cultivation culture system.The evaluation value was analyzed to propose the main issues in the sustainable development of Wannian rice cultivation culture.
文摘The study introduced protected agriculture development in Qinghai province and concluded its development scale, type and structure, as well as technology supports. Besides, existing problems were proposed such as lower production-level, poor equipment, fewer specialized bases, and countermeasures include the following: leading protected agriculture development by macro-control; strengthening market supervision; improving scientific research and innovation to help S & T achievement transformation.
基金Supportd by Science and Technology Cooperation Project of Anhui Science and Technology Department (11030603031)~~
文摘[Objective] The aim was to make analysis on natural condition,present situation,and potential of rice production development in Angola.[Method] Conclusion and analysis of rice development in Angola were conducted from natural condition,production status,present problem and development potential.[Result] In Angola,about 30 million hectares agricultural lands enjoy fresh water,temperature,and light resources which are requirement for rice development.Presently,however,some disadvantages have harassed the nation,such as outdated production mode and technology,small cultivated area and low level of per unit yield.In addition,about 98% of consumed rice was imported from other countries.The government has attached high importance to food production,and rice production was a priority of national investment.Per unit rice yield would achieve 7 500 kg/hm2 if Angola introduces hybrid rice species and high-yield cultivation techniques from China.[Conclusion] The research provided technical reference for enterprises or individuals ready to invest in rice development in Angola.
基金support by the National Natural Science Foundation of China(No.71273090)Fundamental Research Funds for the Central Universities(No.2015XS44)
文摘With the rapid development of its national economy,China has become a major producer and consumer of energy.To guarantee the sustainable development of power industry and national economy,China should exploit fossil and renewable energy efficiently according to the development situation of generation resources.Firstly,this paper analyzes the utilization status of main generation resources in China,such as coal,hydropower and wind energy.Secondly,this paper illustrates the STEP model,which analyzes some issues for China’s generation resource utilization from political,economic,social and technological aspects.For example,the resource distribution is inconsistent with electricity demand,the renewable energy power output is intermittent,and there is some disruption in coal mining.Finally,combined with the utilization status and issues,this paper presents some improvement approaches from the perspectives of cost,efficiency and external influence.
文摘Traditional farming practices conform to sustainable rural livelihoods, while agricultural modernisation tends to undermine these practices through various perturbations. A case study in Tengchong County (western Yunnan, China) shows that transformation of traditional alder (Alnus nepalensis) and dry rice (upland rice) rotational farming to introduced Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations leads to localised water scarcity and soil fertility decline. While farmers are aware of ecological sustainability of traditional farming, they prefer Chinese fir forestry because it is less labour-intensive, has a high market value, and releases time for profitable off-farm work. Farmers adapt to economic liberalization by planting high value crops and trees. However, alternatives to make local agricultural production more profitable through competitive business strategies, cooperative approaches, innovations in integrating high value crops and 'downstream' processingfor sustainable rural livelihoods have been overlooked largely due to poor information availability and lack of organisational framework.
基金Supported by Natural Science Foundation of Hainan Province (40879)Key Subject "Cartography and Geographic Information System"and "Natural Geography" of Hainan Normal University
文摘In the study,the connotation and objectives of agricultural cleaner production were introduced firstly,and then the development status of agricultural cleaner production in China was analyzed,and the problems existing in the development of agricultural cleaner production were pointed out.From the strategy of agricultural sustainable development,the necessity and feasibility of implementing agricultural cleaner production in China were discussed.Finally,some related countermeasures were put forward according to the problems existing in the development of agricultural cleaner production,so as to provide theoretical references for the realization of agricultural sustainable development in China.
基金supported by the Guangdong Provincial Key Project of Natural Science Foundation, China (Grant No. 021037)Guangdong Province Natural Science Foundation, China (Grant No. 7301008)+1 种基金South China Agricultural University President Foundation, China (Grant No. 2007K036)The Confocal Laser Scanning Microscope was provided by the Testing Center of South China Agricultural University, Guangzhou, China
文摘As maternal parents, diploid (L202-2x) and autotetraploid (L202-4x) of Oryza sativa cv. L2O2 were crossed with O. officinalis. Embryo development and fertilization in these two crosses were comparatively studied. There were no mature hybrid seeds obtained because all the hybridized spikelets died 30 days after pollination. The main reasons for no seed set were abnormal fertilization and development of the embryos and endosperms in the interspecific hybrids. There were doublefertilization, egg cell single-fertilization and non-fertilization in these crosses. Although 59.45% and 54.87% of hybrid embryos produced in the crosses of L202-2x/O. officinalis and L202-4x/O. officinalis, respectively, hybrid embryos ceased to develop or degenerated and plenty of free endosperm nuclei were in disaggregating state without developing cellular endosperms three days after pollination. Besides, some embryological differences in these two crosses were found, that is, the rate of double-fertilization and total rate of doubleand single-fertilization in L202-2x/O. officinalis were higher than those in L202-4x/O. officinalis. The embryo and endosperm of hybrids developed more slowly, and embryos and free endosperm nuclei were more severely degenerated in L202-4x/O. officinalis than in L202-2x/O. officinalis. Five days after pollination, a few of embryos in L202-2x/O. officinalis developed into pear-shaped ones, however, embryos in L202-4x/O. officinalis were all degenerated. Therefore, it is more difficult to obtain interspecific hybrids by wide crosses between autotetraploid of O. sativa and O. officinalis.
文摘s: The current status of AEE in Hunan Province is introduced in brief. The reasons why the AEE was polluted and destroyed are analyzed; the countermeasures for improving AEE are brought forward.
文摘Background:Since the declaration of the Millennium Development Goals(MDGs)in 1990,many countries of the Middle East and North Africa(MENA)region made some improvements in maternal and child health and in tackling communicable diseases.The transition to the global agenda of Sustainable Development Goals brings new opportunities for countries to move forward toward achieving progress for better health,well-being,and universal health coverage.This study provides a profile of health status and health financing approaches in the MENA region and their implications on universal health coverage.Methods:Time-series data on socioeconomics,health expenditures,and health outcomes were extracted from databases and reports of the World Health Organization,the World Bank and the United Nations Development Program and analyzed using Stata 12 statistical software.Countries were grouped according to the World Bank income categories.Descriptive statistics,tables and charts were used to analyze temporal changes and compare the key variables with global averages.Results:Non-communicable diseases(NCDs)and injuries account for more than three quarters of the disabilityadjusted life years in all but two lower middle-income countries(Sudan and Yemen).Prevalence of risk factors(raised blood glucose,raised blood pressure,obesity and smoking)is higher than global averages and counterparts by income group.Total health expenditure(THE)per capita in most of the countries falls short of global averages for countries under similar income category.Furthermore,growth rate of THE per capita has not kept pace with the growth rate of GDP per capita.Out-of-pocket spending(OOPS)in all but the high-income countries in the group exceeds the threshold for catastrophic spending implying that there is a high risk of households getting poorer as a result of paying for health care.Conclusion:The alarmingly high prevalence of NCDs and injuries and associated risk factors,health spending falling short of the GDP and GDP growth rate,and high OOPS pose serious challenges for universal health coverage.Using multi-sector interventions,countries should develop and implement evidence-informed health system financing roadmaps to address these obstacles and move forward toward universal health coverage.
文摘With the increasingly deepened sustainable development concept in China, the logistics industry is undergoing transformation toward green logistic, requiring relevant logistics companies to fully strengthen green logistics management to accelerate the sustainable development of the logistics industry. This paper is focused on the analysis of green logistics management in the context of sustainable development. The meaning of green logistics management is firstly introduced, and then the importance of green logistics management is discussed. According to the current status of green logistics management, this paper proposes relevant management countermeasures, hoping to provide relevant personnel with certain reference.
文摘The meiotic stage of pollen mother cell is a very important stage in controlling the development and formation of pollen. In order to clone the rice cDNA(s) of this stage, a normal rice, Annong N and its thermosensitive mutant, Annong S-1 were used as the plant material. The mRNA has been extracted from the young panicle at the meiotic stage. By using the cDNA subtraction hybridization technique, three cDNA fragments, RP-1, RP-2 and RP-3 have