[Objective] The aim was to reveal the distribution characteristics of Pb in the soil-rice system of western Hainan Island, China. [Method] With the western re- gion of Hainan as the study area, the distribution charac...[Objective] The aim was to reveal the distribution characteristics of Pb in the soil-rice system of western Hainan Island, China. [Method] With the western re- gion of Hainan as the study area, the distribution characteristics of Pb in the soil- rice system were analyzed comprehensively by combining field survey and indoor analysis under the assistance of geostatistical and spatial analysis techniques. [Result] The content of Pb in soil of western Ha/nan was 43.6 mg/kg. There were dif- ferences in Pb content among the soils developed from different parent materials. The distribution of Pb in the study area was affected by the distribution of parent material, and it was not closely related to soil properties. The content of Pb in white rice was lower than that in straw, and the mean contents were 0.14 and 3.48 mg/kg, respectively. The content of Pb in white rice was not closely related to soil properties. [Conclusion] The content of Pb in the soil of western Hainan Island was low in overall, and the Pb content in white rice was lower than the limit of National Food Safety Standard of Pb Content for Rice. In short, the ecological risk of Pb pollution in the study area was low.展开更多
To illuminate the migration and transformation of selenium(Se)in the igneous rock-soil-rice system,285 pairs of rhizosphere soil and rice samples were collected from the granitoid and basalt areas in Hainan Province,S...To illuminate the migration and transformation of selenium(Se)in the igneous rock-soil-rice system,285 pairs of rhizosphere soil and rice samples were collected from the granitoid and basalt areas in Hainan Province,South China.The contents of Se in soils derived from granitoid and basalt are,respectively,0.19±0.12 mg/kg and 0.34±0.39 mg/kg,which are much higher than Se contents in granitoid and basalt.Selenium shows remarkable enrichment from granitoid and basalt to soils.The mobile fraction of Se in soils derived from granitoid is 0.0100±0.0034 mg/kg,which is significantly higher than that of basalt(0.0058±0.0039 mg/kg).Although soil derived from basalt shows higher Se contents,Se contents in rice samples,mobile fractions of Se in soils,and biological concentration factor(BCF)is similar or even lower than that from granitoid.Basalt consist of calcic plagioclase and pyroxene,and are much richer in Fe,Al,and Ca than granitoid.Correspondingly,the basalt-derived soils have higher goethite,hematite,kaolinite,cation exchange capacity(CEC)content,and higher p H than the granitoid-derived soils,which result in higher adsorption capacity for Se and relatively lower Se bioavailability.Soils derived from granitoid and basalt in tropical regions are beneficial to produce Se-rich rice.展开更多
Taoyou Xiangzhan, derived from the indica CMS line Taonong 1A and Huanghuazhan （a fine quality conventional rice variety）, is a new medium-maturing late season indica hybrid rice combination. It was evaluated as the...Taoyou Xiangzhan, derived from the indica CMS line Taonong 1A and Huanghuazhan （a fine quality conventional rice variety）, is a new medium-maturing late season indica hybrid rice combination. It was evaluated as the 2nd class of fine quality rice variety in Hunan Province in 2012. It is characteristic of high-yielding ability, fine grain quality, good plant type, good lodging resistance and fertilizer tolerance, strong tillering ability and good discoloring at the late growth stage. Taoyou Xiangzhan was registered for release to commercial production by Hunan Provincial Crop Variety Appraisal Committee in June, 2015.展开更多
Rice yield is still low in Nigeria despite the ecological advantages. Several challenges has been traced it production. The study intend to investigate if other rice producing nations are faced with similar challenges...Rice yield is still low in Nigeria despite the ecological advantages. Several challenges has been traced it production. The study intend to investigate if other rice producing nations are faced with similar challenges and at what magnitude and more importantly, what can be learn to improve the rice yield in Nigeria. Based on 2013/2014 survey, a total sample of 400 famers were randomly interviewed;164 from Niger State of Nigeria and 236 from Hainan province of China. The study collate the perception of farmers to rice production constraints categorized into biotic, abiotic and socioeconomics. Biplot analysis was employed to examine multivariate pattern of their perceptions towards production constraints. The multivariate technique simultaneously displaying different yield levels and factor constraints in data matrix providing the inter-unit distances, variance and correlations of variables. According to the study, Niger state farmers identified socioeconomic constraint as the major factors to production and attributed it to lack of or insufficient investment while the Hainan farmers majorly identified abiotic constraints. The study also indicated that great potential remain to further improve rice yield in both regions especially in Nigeria given the appropriate investment on essential inputs. This study is of great use to extension officers more so, given the investment in Africa, policy makers take advantage of the bilateral and multilateral relationship to invest ease transfer of agricultural information and technologies between or among partners.展开更多
A workshop on rice production of China was held at Hainan Province on Jan. 16-17, 1996. The purpose of the workshop was to discuss the strategy for acquiring the bumper harvest of rice in 1996 and the goal of rice pro...A workshop on rice production of China was held at Hainan Province on Jan. 16-17, 1996. The purpose of the workshop was to discuss the strategy for acquiring the bumper harvest of rice in 1996 and the goal of rice production-during the "Ninth Five-year Plant". According to the project set up by the Chinese Ministry of Agriculture, the rice yield in China has to reach 195 billion kg in 2000 AC. This means that at least the rice yield has to be increased by 2.5 billion kg every year progressively during 1996—2000. The participants put forward several rationalization proposals such as recovering the cultivated area of early rice, developing the cultivation of ratooning rice and展开更多
Using the meteorological data and geographical information during January-March（1961-2010） accumulated by 18 stations of Hainan,a suitability zoning map for thermo-sensitive genetic male sterility（TGMS） rice was m...Using the meteorological data and geographical information during January-March（1961-2010） accumulated by 18 stations of Hainan,a suitability zoning map for thermo-sensitive genetic male sterility（TGMS） rice was made by GIS technology based on temperature indicators required by TGMS rice during fertility sensitive period and heading-flowering period,aiming to provide reasonable layout and scientific basis for sustainable development of TGMS rice in Hainan Island under the background of global warming.The results indicated that the suitable planting zones covered the south regions of Wuzhishan,Jianfengling and Diaoluoshan;subordinate suitable zones expanded northward to central parts of Wuzhishan,Dongfang,Changjiang,Qiongzhong and southern parts of Wanning;the other regions were unsuitable for breeding.展开更多
基金Supported by National Nonprofit Institute Research Grant of CATAS-TCGRI(1630032014035)~~
文摘[Objective] The aim was to reveal the distribution characteristics of Pb in the soil-rice system of western Hainan Island, China. [Method] With the western re- gion of Hainan as the study area, the distribution characteristics of Pb in the soil- rice system were analyzed comprehensively by combining field survey and indoor analysis under the assistance of geostatistical and spatial analysis techniques. [Result] The content of Pb in soil of western Ha/nan was 43.6 mg/kg. There were dif- ferences in Pb content among the soils developed from different parent materials. The distribution of Pb in the study area was affected by the distribution of parent material, and it was not closely related to soil properties. The content of Pb in white rice was lower than that in straw, and the mean contents were 0.14 and 3.48 mg/kg, respectively. The content of Pb in white rice was not closely related to soil properties. [Conclusion] The content of Pb in the soil of western Hainan Island was low in overall, and the Pb content in white rice was lower than the limit of National Food Safety Standard of Pb Content for Rice. In short, the ecological risk of Pb pollution in the study area was low.
基金financially supported by the projects of the China Geological Survey(DD20190518,DD20190527)。
文摘To illuminate the migration and transformation of selenium(Se)in the igneous rock-soil-rice system,285 pairs of rhizosphere soil and rice samples were collected from the granitoid and basalt areas in Hainan Province,South China.The contents of Se in soils derived from granitoid and basalt are,respectively,0.19±0.12 mg/kg and 0.34±0.39 mg/kg,which are much higher than Se contents in granitoid and basalt.Selenium shows remarkable enrichment from granitoid and basalt to soils.The mobile fraction of Se in soils derived from granitoid is 0.0100±0.0034 mg/kg,which is significantly higher than that of basalt(0.0058±0.0039 mg/kg).Although soil derived from basalt shows higher Se contents,Se contents in rice samples,mobile fractions of Se in soils,and biological concentration factor(BCF)is similar or even lower than that from granitoid.Basalt consist of calcic plagioclase and pyroxene,and are much richer in Fe,Al,and Ca than granitoid.Correspondingly,the basalt-derived soils have higher goethite,hematite,kaolinite,cation exchange capacity(CEC)content,and higher p H than the granitoid-derived soils,which result in higher adsorption capacity for Se and relatively lower Se bioavailability.Soils derived from granitoid and basalt in tropical regions are beneficial to produce Se-rich rice.
基金Supported by High-grade and High-quality New Rice Variety Breeding of Better Rice Industry in Hunan Province~~
文摘Taoyou Xiangzhan, derived from the indica CMS line Taonong 1A and Huanghuazhan （a fine quality conventional rice variety）, is a new medium-maturing late season indica hybrid rice combination. It was evaluated as the 2nd class of fine quality rice variety in Hunan Province in 2012. It is characteristic of high-yielding ability, fine grain quality, good plant type, good lodging resistance and fertilizer tolerance, strong tillering ability and good discoloring at the late growth stage. Taoyou Xiangzhan was registered for release to commercial production by Hunan Provincial Crop Variety Appraisal Committee in June, 2015.
文摘Rice yield is still low in Nigeria despite the ecological advantages. Several challenges has been traced it production. The study intend to investigate if other rice producing nations are faced with similar challenges and at what magnitude and more importantly, what can be learn to improve the rice yield in Nigeria. Based on 2013/2014 survey, a total sample of 400 famers were randomly interviewed;164 from Niger State of Nigeria and 236 from Hainan province of China. The study collate the perception of farmers to rice production constraints categorized into biotic, abiotic and socioeconomics. Biplot analysis was employed to examine multivariate pattern of their perceptions towards production constraints. The multivariate technique simultaneously displaying different yield levels and factor constraints in data matrix providing the inter-unit distances, variance and correlations of variables. According to the study, Niger state farmers identified socioeconomic constraint as the major factors to production and attributed it to lack of or insufficient investment while the Hainan farmers majorly identified abiotic constraints. The study also indicated that great potential remain to further improve rice yield in both regions especially in Nigeria given the appropriate investment on essential inputs. This study is of great use to extension officers more so, given the investment in Africa, policy makers take advantage of the bilateral and multilateral relationship to invest ease transfer of agricultural information and technologies between or among partners.
文摘A workshop on rice production of China was held at Hainan Province on Jan. 16-17, 1996. The purpose of the workshop was to discuss the strategy for acquiring the bumper harvest of rice in 1996 and the goal of rice production-during the "Ninth Five-year Plant". According to the project set up by the Chinese Ministry of Agriculture, the rice yield in China has to reach 195 billion kg in 2000 AC. This means that at least the rice yield has to be increased by 2.5 billion kg every year progressively during 1996—2000. The participants put forward several rationalization proposals such as recovering the cultivated area of early rice, developing the cultivation of ratooning rice and
基金Supported by the Project of Meteorological Service Website Construction for HainanBreeding(Qiong Nong Ji Cai No.[2013]18 of Hainan Provincial Department of Agriculture)~~
文摘Using the meteorological data and geographical information during January-March（1961-2010） accumulated by 18 stations of Hainan,a suitability zoning map for thermo-sensitive genetic male sterility（TGMS） rice was made by GIS technology based on temperature indicators required by TGMS rice during fertility sensitive period and heading-flowering period,aiming to provide reasonable layout and scientific basis for sustainable development of TGMS rice in Hainan Island under the background of global warming.The results indicated that the suitable planting zones covered the south regions of Wuzhishan,Jianfengling and Diaoluoshan;subordinate suitable zones expanded northward to central parts of Wuzhishan,Dongfang,Changjiang,Qiongzhong and southern parts of Wanning;the other regions were unsuitable for breeding.
