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北大荒薯业集团谱写铸牢粮食安全与食品安全“压舱石”新篇章
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作者 彭琦 《农场经济管理》 2024年第8期5-6,共2页
近年来,北大荒薯业集团在面对重重挑战下,坚持党建引领,积极践行国家粮食安全战略,取得扭亏增盈的显著成绩。集团“走出去”战略的实施及科技研发、产品创新等方面的突破,展现了薯业集团作为国家粮食安全与食品安全“压舱石”的担当与... 近年来,北大荒薯业集团在面对重重挑战下,坚持党建引领,积极践行国家粮食安全战略,取得扭亏增盈的显著成绩。集团“走出去”战略的实施及科技研发、产品创新等方面的突破,展现了薯业集团作为国家粮食安全与食品安全“压舱石”的担当与使命。 展开更多
关键词 北大荒薯业集团 “粮食安全” “走出去”战略
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人口:中国的“软肋” 被引量:1
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作者 原华荣 《吉林师范大学学报(人文社会科学版)》 2017年第2期87-101,共15页
人口数量是决定人类、生物圈命运的"序参量",对社会、环境和人类自身,不论从伦理学、社会学、经济学,还是从人口学、生态学、未来学看,其影响都是根本性的。数量过多是"心膂之忧";"规模问题"不存在技术解... 人口数量是决定人类、生物圈命运的"序参量",对社会、环境和人类自身,不论从伦理学、社会学、经济学,还是从人口学、生态学、未来学看,其影响都是根本性的。数量过多是"心膂之忧";"规模问题"不存在技术解,技术拯救在当代是一个"陷阱";人口增长在历史上将社会推向只有文明崩溃才能走出的"高位均衡陷阱",周期性波动的人口,则通过对文明因子的"纽带作用",主导着王朝的兴衰交替。人口是中国的"软肋",第一次大爆炸造成环境的全方位大破坏,成为"百年屈辱"的总根源;第二次大爆炸则与30多年来环境的"总体恶化"相伴随。生态/环境的总体恶化是人口-经济规模强制下的必然,人多地少是难以破解的资源/环境瓶颈,粮食安全是悬在头顶之上的"达摩克利斯之剑",大国的国家力量显著小于总产量相同的小国。坚持计划生育基本国策,做经济强国不做人口大国是中国根本而唯一的选择! 展开更多
关键词 人口数量 “序参量” “规模问题” 技术 中国 “软肋” 生态/环境 “粮食安全”
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The Scale of Constructing Mountainous Cities in Yunnan Province based on “Benchmark” Farmlands
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作者 许明军 杨子生 《Agricultural Science & Technology》 CAS 2015年第7期1558-1561,共4页
In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes a... In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes and transforms land use pattern. However, social and economic development performs unevenly in Yun- nan, supplemented by varied geographical conditions, so that constructing mountain- ous cities should proceed as per local conditions. The research proposed the con- trol of constructing mountainous cities provided crop safety under the principle of farmland protection and measured the quantities of demanded construction lands ac- cording to science of population prediction and ekistics, based on which the control scales of constructing mountainous cities were determined by multiplying basic farm- land coefficient and the area of newly increased construction lands. The research is of significance for guiding the construction of mountainous cities and avoiding the occupation of construction lands on farmlands. 展开更多
关键词 Constructing mountainous cities Cultivated land protection Food safety Coefficient of "Benchmark" farmlands Scale of mountainous cities
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Construction of Land Resource Security System for Core Grain Production Region in Henan Province 被引量:1
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作者 杨建波 卫华鹏 +1 位作者 王莉 邵红旗 《Agricultural Science & Technology》 CAS 2017年第12期2435-2439,共5页
To solve the contradiction between supply and demand of land, the con- struction of land resource security guarantee system is an important part to coordi- nate the economic development and cultivated land protection ... To solve the contradiction between supply and demand of land, the con- struction of land resource security guarantee system is an important part to coordi- nate the economic development and cultivated land protection in the core grain pro- duction region. Based on the deep analysis on the land resources characteristics and problems using the combined method of literature review method with qualita- tive and quantitative analysis, we constructed the land resource security system for different categories according to the land use principles of optimization, intensivism, improvement, and overall planning, and proposed the corresponding supporting mea- sures. The results showed that controlling the new increase, promoting the reclama- tion and improvement of land are the basis for land resource security, clearing the idle, improving the utilization rate of stock are the core of the efficient use of land resources, and establishing a unified urban and rural construction land market is the key to promoting the economical and intensive utilization of land resources, provid- ing scientific basis for the sustainable utilization of land resources in the core grain production regions. 展开更多
关键词 core grain production region Land resources Security system Con-struction
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Advances in Plant Science and Its Prospects
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作者 许智宏 《Agricultural Science & Technology》 CAS 2011年第1期1-7,10,共8页
Focusing on the global food security and analyzing the challenges now confronting human being of global climate change,sustainable development of agriculture,energy and environment,plant scientists should take the soc... Focusing on the global food security and analyzing the challenges now confronting human being of global climate change,sustainable development of agriculture,energy and environment,plant scientists should take the social responsibility and play the role in solving the global problems like food security from the developmental status and potential of plant science and technology. Moreover,by working with agronomists, ecologists and environmental experts,plant scientists do provide novel ideas and technologies for developing low carbon agriculture,for breeding new crop varieties with high yield and quality and stress resistance,for developing new type of energy plants,for supplying healthy foods and drugs,reasonably using land and water resources,and for ameliorating environment,making better contribution to the sustainable development of the globe and human being ourselves. 展开更多
关键词 Plant science Food security BIOTECHNOLOGY TRANSGENE Medicinal plant Energy plant
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An Innovative Project of Wheat Breeding
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作者 李邦发 《Agricultural Science & Technology》 CAS 2013年第12期1779-1782,1825,共5页
The objectives of wheat breeding in Sichuan and Chongqing were incon- sistent with the requirements of wheat production in 1980s. The new direction, to breed new wheat variety with high and stable yield, good quality,... The objectives of wheat breeding in Sichuan and Chongqing were incon- sistent with the requirements of wheat production in 1980s. The new direction, to breed new wheat variety with high and stable yield, good quality, resistance to dis- eases, tolerance to spike sprouting, large head, white and big grain and outstanding commercial property, was put out in this article based on the development of wheat production, market economy and the needs of people. Depending on the selection and breeding work of Mianyang Institute of Agricultural Sciences for more than 20 years, new wheat varieties Mianyang 25, Mianyang 26, Mianyang 27, Mianyang 28, Mianyang 31, Xikemai 1 and Xikemai 6 were developed successively, which made a great contribution to the wheat breeding wheat breeding and production in SJchuan and even in China and the national food security. 展开更多
关键词 WHEAT Commodity variety Breeding direction Replacement in wheat variety Food security
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Spatio-temporal Changes of ≥10℃ Accumulated Temperature in Northeastern China since 1961 被引量:23
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作者 YAN Minhua LIU Xingtu +2 位作者 ZHANG Wei LI Xiujun LIU Shi 《Chinese Geographical Science》 SCIE CSCD 2011年第1期17-26,共10页
The objective of this study was to provide reliable basis for decision making for national food security and layout and structure adjustment of grain production in the northeastern China. The data of mean daily air te... The objective of this study was to provide reliable basis for decision making for national food security and layout and structure adjustment of grain production in the northeastern China. The data of mean daily air temperature of 1961-2009 from 106 meteorological stations in the northeastern China were chosen in this study. Using statistical methods and isoline method, the spatio-temporal changes of various decadal ≥10℃accumulated temperature and the climatic means of ≥10℃ accumulated temperature were studied in this paper. The results showed that 1) The geo- graphical distribution of ≥10℃ accumulated temperature in the northeastern China could be influenced directly by the latitude, longitude and altitude. If latitude moved one degree northward, the average decrease amplitude of the climatic means was 101.9℃ in the study area. 2) The means of decadal ≥10℃ accumulated temperature rose since the 1980s, and their increase amplitudes became larger in the 1990s and the 2010s obviously. Compared with those of the 1980s, ≥10℃ accumulated temperature increased by about 100℃ in the mountainous and plain areas in the 1990s; compared with those of the 1990s, ≥10℃ accumulated temperature increased by about 200℃ in the Hulun Buir High Plain and the Songnen Plain, and 100℃ in the Sanjiang Plain and the Liaohe Plain in the 2010s. 3) The means of the decada ≥10℃accumulated temperature for 106 meteorological stations in the northeastern China increased with the rate of 145.57℃/10yr in 1961-2009.4) The climatic means of ≥10℃ accumulated temperature increased from 1961-1990 to 1971-2000 and 1981-2009. Compared with the climatic mean of 1971-2000, that of 1981-2009 had increased by above 50℃ in most of the study area, even up to 156℃. Compared with the climatic mean of 1961-1990, that of 1981-2009 increased by above 100℃ in most parts of the study area, even up to 200℃. 5) The maximum northward shift, eastward and westward extension amplitudes of3100℃, 3300℃ and 3500℃ isolines were larger among all isolines for the climatic means of the three phases. Compared with the positions of the isolines of 1961-1990, those amplitudes of 31000C isoline of 1981-2009 were 145 km, 109 km and 64 km, respectively; those of 3300℃ isoline were 154 km, 54 km and 64 km, respectively; and the maximum northward shift of 3500℃ isoline was about 100 km. 展开更多
关键词 ≥10℃ accumulated temperature climatic mean isoline method northeastern China
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SWOT Analysis on Building Plateau Granary in Yunnan Province
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作者 李琼 钱敏 张晓明 《Agricultural Science & Technology》 CAS 2017年第6期1097-1101,共5页
With the further deepening of economic integration, Yunnan food security problems have become increasingly prominent. The construction of highland granary is an effective way to comply with the important strategic pla... With the further deepening of economic integration, Yunnan food security problems have become increasingly prominent. The construction of highland granary is an effective way to comply with the important strategic plan of China and allevi- ate the food security problems in Yunnan. In this paper, SWOT (Strengths Weak- nesses Opportunities Threats) analysis was used to analyze the advantages and disadvantages, opportunities and challenges encountered in the construction of Yun- nan plateau granary, and corresponding countermeasures and suggestions were proposed. 展开更多
关键词 YUNNAN Plateau granary Grain security SWOT
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Soil Degradation and Food Security Coupled with Global Climate Change in Northeastern China 被引量:3
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作者 GONG Huili MENG Dan +1 位作者 LI Xiaojuan ZHU Feng 《Chinese Geographical Science》 SCIE CSCD 2013年第5期562-573,共12页
The northeastern China is an important commodity grain region in China,as well as a notable corn belt and major soybean producing area.It thus plays a significant role in the national food security system.However,larg... The northeastern China is an important commodity grain region in China,as well as a notable corn belt and major soybean producing area.It thus plays a significant role in the national food security system.However,large-scale land reclamation and non-optimum farming practices give rise to soil degradation in the region.This study analyzed the food security issues coupled with global climate change in the northeastern China during 1980–2000,which is the period of modern agriculture.The results of statistical data show that the arable land area shrank markedly in 1992,and then increased slowly,while food production generally continually increased.The stable grain yield was due to the increase of applied fertilizer and irrigated areas.Soil degradation in the northeastern China includes severe soil erosion,reduced soil nutrients,a thinner black soil layer,and deterioration of soil physical properties.The sustainable development of the northeastern China is influenced by natural-artificial binary disturbance factors which consist of meteorological conditions,climate changes,and terrain factors as well as soil physical and chemical properties.Interactions between the increasing temperature and decreasing precipitation in the region led to reduced accumulation of soil organic matter,which results in poor soil fertility.Human-induced factors,such as large-scale land reclamation and non-optimum farming practices,unsuitable cultivation systems,dredging,road building,illegal land occupation,and extensive use of fertilizers and pesticides,have led to increasingly severe soil erosion and destruction.Solutions to several problems of soil degradation in this region requiring urgent settlement are proposed.A need for clear and systematic recognition and recording of land use changes,land degradation,food production and climate change conditions is suggested,which would provide a reference for food security studies in the northeastern China. 展开更多
关键词 food security soil degradation climate change northeastern China black soil region
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Analysis of Grain Storage Security Countermeasures under the New Normal Condition with "Grain Storage Technology" as the Core 被引量:6
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作者 Xingang ZHAO Shengzhong DONG +3 位作者 Hongwei MA Zhaohuan WEN Xiufeng SHAN Peng MAO 《Agricultural Science & Technology》 CAS 2017年第10期1971-1974,共4页
Grain storage security is big issue related to national economy and the people's livelihood, as well as one of the most important strategic requirements in China. Under the background of grain supply-side structural ... Grain storage security is big issue related to national economy and the people's livelihood, as well as one of the most important strategic requirements in China. Under the background of grain supply-side structural reform, this paper analyzed the grain storage security countermeasures under the new normal conditions with "grain storage technology", one of the national grain security strategies of China during the 13th Five-year Plan, as the guiding ideology, from the perspectives of scientific technologies, policy supports, government supports and talent construction, so as to provide supports for the storage enterprises with vulnerable technological links. In addition, the food security issues discussed in this paper could be a helping hand in improving people's living quality, enhancing grain storage ecological quality, promoting grain green storage quality security, and be of important and profound strategic significance to enhance the macro-control capability of the government, maintain social stability and people's health. 展开更多
关键词 Grain storage technology Grain storage security Countermeasure analysis
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Climate change impact in the Western Himalaya:people's perception and adaptive strategies 被引量:2
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作者 Vikram S.Negi Rakesh K.Maikhuri +2 位作者 Dalbeer Pharswan Shinny Thakur Pitamber P.Dhyani 《Journal of Mountain Science》 SCIE CSCD 2017年第2期403-416,共14页
The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for... The Himalaya represents a vast mountain system and globally valued for its significant role in regulation of global as well as regional climate that has direct impact on biodiversity and ecosystem services crucial for sustenance of millions of people in Himalaya and adjoining areas. However, mountain regions worldwide are impacted by climate change and at the same time represent distinctive area for the assessment of climate related impacts. Climate change impacts in Himalayan region have its implications on food production, natural ecosystems,retreat of glacier, water supply, human and animal health and overall human well being. The livelihood and food security of the people inhabited in region largely depend on climate sensitive sectors i.e.agriculture, livestock, forestry and their interlinkages with each other, and has the potential to break down food and nutritional security as well as livelihood support systems. People's perception and understanding of climate can be an important asset when it comes to adaptation to climate change impact;however it is not taken into consideration for the development of policy design and implementation of modern mitigation and adaptation strategies by governments and other civil society organizations.The knowledge of local people and farming communities for rural landscape management and sustainable use of bioresources is gaining credence as a key strategy to cope up with the climate change.Therefore, the present study analyzes the indigenous knowledge of local people and their perceptions on climate change, and also documented adaptation approaches at local level in mountain ecosystem of western Himalaya. The study could be useful to policy makers to design appropriate adaptation strategies to cope up with the impacts of climate change. 展开更多
关键词 Western Himalaya Climate change People's perception Traditional knowledge ADAPTATION
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The Grain-population Relationship and the Effect of Main Food Producing Areas in China 被引量:1
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作者 Zhang Jing 《Chinese Journal of Population,Resources and Environment》 2012年第4期64-68,共5页
With the increase of global population,grain-population relationship has attracted great attention worldwide.In China,grain-population relationship has become an increasingly important economic concern.Of central impo... With the increase of global population,grain-population relationship has attracted great attention worldwide.In China,grain-population relationship has become an increasingly important economic concern.Of central importance to the food security debate in China is the geography of grain supply and demand.This paper uses a grain demand and supply index (DSR) to analyze the spatial-temporal relationship between population and grain in China from 1949 to 2007 at national and provincial scales.The results are examined in three periods.(1) From 1949 to 2007,with the increase of grain production,the relationship between population and grain of China improved considerably.(2) Over the past 35 years (1970-2005),on the whole the grain producing areas have had grain surplus and contributed to the nation by providing grain,but the ability to provide sufficient grain is not stable.(3) Over the past 15 years (1990-2005),decreases in planting area brought pressure on national grain food security.The paper concludes that the key to providing more food for the main food producing provinces is increasing yield on the basis of steady plant area. 展开更多
关键词 POPULATION GRAIN regional difference food security China
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Impact of Climatic Change on Agricultural Production and Response Strategies in China 被引量:1
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作者 Liu Yansui Liu Yu Guo Liying 《Chinese Journal of Population,Resources and Environment》 2011年第4期16-23,共8页
A number of studies indicate that global climate warming has been increasing, especially in recent decades. Climate warming greatly affects global agro-production and food security-- becoming a hotspot of global envir... A number of studies indicate that global climate warming has been increasing, especially in recent decades. Climate warming greatly affects global agro-production and food security-- becoming a hotspot of global environmental change. This paper proposes a structural and orientational framework for scientifically addressing climatic change impact on agroroduction. Through literature reviews and comparative studies, the paper systematically summarizes influencing mechanisms and impact of climate warming on such agro-production factors as light, temperature, soil quality and water environment. The impact of climate warm- ing on cultivation regions, cropping systems, crop pests, agro- production capacity, agro-economy and farm management is analyzed. Then, suitable climate-adapting agro-development strategies are put forward for different regions in China. The strategies are carefully selected from a repository of international tested climatic change countermeasures in agriculture at national or district level. 展开更多
关键词 agro-production food security climatic change response strategy China
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Determinants of Food Security in Selected Agro-pastoral Communities of Somali and Oromia Regions, Ethiopia 被引量:1
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作者 Kwadwo Asenso-Okyere Daniel Ayalew Mekonnen Elias Zerfu 《Journal of Food Science and Engineering》 2013年第9期453-471,共19页
In spite of receiving a significant amount of food aid, achieving food security has been a major problem in Ethiopia. The claim is evidenced from the 2010 Global Hunger Index where the country fared dismally, coming o... In spite of receiving a significant amount of food aid, achieving food security has been a major problem in Ethiopia. The claim is evidenced from the 2010 Global Hunger Index where the country fared dismally, coming only fourth from the bottom. There are several factors attributing to this problem of food insecurity in a country like Ethiopia which depends highly on agriculture and allied activities. Some of the factors can be linked to low food production and productivity thereby leading to pervasive poverty. In order to assess these factors, the study was conducted on some selected members of agro-pastoral communities of Somali and Oromia regions in Ethiopia. Using availability of food in the household for the last one month as a proxy for food security, the estimated results of a logistic regression model indicated that the most significant factors affecting household food security are educational level of the spouse and that of the household head, size of farm land, availability of household assets including livestock, peace and security. The paper suggests some leads to how these amenities and resources can be provided to household members as they endeavor to reduce food insecurity. 展开更多
关键词 Household food security HUNGER food availability agro-pastoral Ethiopia.
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China’s Food Security Status:Assessment and Strategic Reflections 被引量:1
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作者 张元红 刘长全 国鲁来 《China Economist》 2015年第6期28-43,共16页
Based on an internationally recognized concept of food security, this paper has created a system of eight indicators to analyze China's food security. For the proper control and analysis of this study, the authors of... Based on an internationally recognized concept of food security, this paper has created a system of eight indicators to analyze China's food security. For the proper control and analysis of this study, the authors of this paper have chosen these indicators: supply, distribution, consumption, utilization efficiency, food security results, stability, sustainability and controllability. Results indicate that China's food security is currently at a high level and has been increasing in recent years. China's food security has multiple advantages with various indicators that include a self-sufficiency ratio, per capita calorie intake and protein supply that are above world average levels, even exceeding the average level of some developed countries. Major challenges facing China's food security include an unreasonable nutrition structure and poor environmental sustainability. In order to increase China's food security level, efforts must be made to adjust output structure, adopt an environmentally friendly pattern of production, attach importance to demand management, reduce unreasonable consumption and loss and moderately lower China's food reserve ratio. 展开更多
关键词 food security index self-sufficiency ratio SUSTAINABILITY
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Present Situation and Strategies for State Foodstuff Security 被引量:2
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作者 Jiayong Song Jun Yin 《Chinese Business Review》 2005年第2期52-55,共4页
The system of State Foodstuff Security is a comprehensively systematical framework, which needs concerted support and energetic cooperation from all walks of lives. This paper analyzes the strategies for State Foodstu... The system of State Foodstuff Security is a comprehensively systematical framework, which needs concerted support and energetic cooperation from all walks of lives. This paper analyzes the strategies for State Foodstuff Security: integrating new biological techniques with traditional methods, full utilization of soil with its protection, policies leading with market regulation, steady high yield with promoting additional value through further processing, general foodstuff production with substitute food seeking, domestic self-supply with international trade complementarities as well as short-term exploiting with long-term development on the basis of the increase of general foodstuff production capability. 展开更多
关键词 foodstuff security strategy
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Research on driving forces for rural settlement land changes in China 被引量:2
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作者 CHEN Chun FENG Chang-chun 《Ecological Economy》 2010年第3期228-238,共11页
During the rapid urbanization period, the contradiction between demand for the construction land and the preservation of cultivated land for food security is getting more and more serious in China. With the urbanizati... During the rapid urbanization period, the contradiction between demand for the construction land and the preservation of cultivated land for food security is getting more and more serious in China. With the urbanization the rural settlement land is increasing instead of decreasing; This paper aims at.finding the driving forces for rural settlement land expanston. Based on land use change survey data (1996-2006) by the Ministry of Land and Resources P. R. C., this paper find, that per capita area for rural settlement land is more than per capita area for city; township and industrial land in each province except Tibet. Besides, rural settlement land area and per capita rural settlement land area are increasing while the rural poputation is decreasing in most provinces. The main problems of rural settlement land use are low efficiency, high vacancy rate, chaotic layout and illegal occupancy. Then the driving forces [br rural settlement land expansion, including economic development, family income, family scale, psychological factors, urbanization, transportation, lack of planning, limited circulation of dwelling-house land and imperfect sociat security, ate explored based on above analysis, Finalty, policy recommendations, in view of different influencing factors, are put forward to control the disorder expansion of rural setttement land. 展开更多
关键词 Rural settlement land: Land changes Driving forces: China
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Impact of Africa Regional Food Security Program on Nigerian Farmers: The Case of National Special Program for Food Security 被引量:4
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作者 P. O. Agbola S. A.Yusuf +1 位作者 A. A. Adubi D. O. Awotide 《Journal of Agricultural Science and Technology》 2010年第5期51-60,共10页
This paper examined the impact of National Special Program for Food Security (NSPFS) on the beneficiaries through a qualitative measurement of the food security status of the beneficiaries. A food insecurity index w... This paper examined the impact of National Special Program for Food Security (NSPFS) on the beneficiaries through a qualitative measurement of the food security status of the beneficiaries. A food insecurity index was estimated to measure the well-being of the beneficiaries as affected by the impact of the program. Beneficiaries were classified into four categories: food secure (41%), food insecure without hunger (46%), food insecure with moderate hunger (11%), and food insecure with severe hunger (2%). Perceptions of beneficiaries were measured. In conclusion, the program has had a positive impact and enhanced food security among the Nigerian beneficiaries. It is not without its short comings which include delayed and untimely disbursement of funds and lack of output markets, irrigation facilities, production inputs and adequate training on technology know-how. The default rate and number of debtors remain high among beneficiaries. Efforts should be made to correct the short comings to improve the effectiveness of the program and justify the huge financial resources that have been committed. 展开更多
关键词 National special program for food security BENEFICIARIES Nigeria.
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Standardized Cultivation of Cold Region Rice in Heilongjiang Reclamation Area 被引量:1
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作者 马德全 霍立君 李玉成 《China Standardization》 2014年第1期61-65,共5页
The paper analyzes the characteristics of rice production in Heilongjiang Reclamation Area(HRA)and the achievements made through innovative research and practice,evaluates the standardized mode of rice cultivation and... The paper analyzes the characteristics of rice production in Heilongjiang Reclamation Area(HRA)and the achievements made through innovative research and practice,evaluates the standardized mode of rice cultivation and technical standards for rice production,which play a key role in guaranteeing the growth of grain total output in Heilongjiang reclamation area and make great contributions to the national grain safety. 展开更多
关键词 rice in cold region MODE standardized production
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Conversion Margins for the Major Uses of Agricultural Land and Their Variations in Shandong Province, China
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作者 Wang Xingjie Gu Shuzhong +3 位作者 Zhang Xinhua Wu Hong Zhou Hong Wen Wujun 《Chinese Journal of Population,Resources and Environment》 2011年第1期55-62,共8页
It is of practical significance for the decision-making on country food security and farmland protection to analyze the conversion margins for the major uses of agricultural land and their variations. Based on the pan... It is of practical significance for the decision-making on country food security and farmland protection to analyze the conversion margins for the major uses of agricultural land and their variations. Based on the panel data of wheat, corn, vegetable, fruit, and forests productions from 520 investigated farmer households of 13 investigated villages in Shandong Province from 2003 to 2009, and using Cobb-Douglas production function, the revenue conversion margins can be obtained separately, between different grain-crops (wheat, corn) and different non-grain crops (vegetable, fruit, forests), and the conversion relationship between growing grain( wheat, corn) and going out for non-farm work. The results show that from 2003 to 2009, growing wheat and corn are more economically and reasonably for farmers, compared with growing vegetable, but growing wheat and corn are becoming less economically and less reasonably day by day, compared with planting forests. Moreover, the conversion margin between wheat and fruit shows obvious scissors difference. Just from 2007, farm- ers' growing fruit became economically and reasonably, but until 2009, compared with going out to work after abandoning farm- land, growing wheat had no economic rationality. From 2003 to 2009, farmers' growing corn is more profitable than growing fruit and going out for non-farm work after abandoning farmland. The subsidies for wheat and corn have increased farmers' comparative income from food production remarkably, but the subsidies cannot change the general tendency that farmers transform food (wheat, corn) production into non-food (especially forests) production. The revenue difference between growing wheat, corn and vegetable and growing fruit and forests is being pulled ceaselessly bigger, and the tendency that farmers transform wheat, corn and vegetable growing lands into fruit and forests growing lands has become increasingly apparent. 展开更多
关键词 agricultural land FARMER conversion margin C-D production function SUBSIDIES Shandong Province
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