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《Journal of Anhui Agricultural Sciences》 2009-06
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Evaluation of the Climate Production Potential of Agriculture in Three Gorges Reservoir Area

ZHONG Hai-ling et al(Laboratory of Climate Studies,National Climate Center,China Meteorological Administration,Beijing 100081)  
Based on the meteorological data from 1961 to 2007,the conditions of climate production potential and the increasing effectiveness available by improving the climatic conditions in Three Gorges Reservoir using the dynamic statistic model of crop growth has been analyzed.The results showed that the distribution of the annual temperature in Three Gorges Reservoir was higher in northwest than southeast,but the distribution of the annual precipitation was opposite to the distribution of the annual temperature,then the distribution of the annual sunshine time was more in northeast than southwest.The distribution characteristics of photosynthetic production potential were as same as the distribution of the annual sunshine time basically.Due to the impact of temperature and moisture,light-temperature production potential and climate production potential in Three Gorges Reservoir were higher in northeast than southeast.Photosynthetic production potential of rice,corn and winter wheat in Three Gorges Reservoir Area were 23 268 kg/hm2,18 447 kg/hm2 and 11 194 kg/hm2,respectively.Light-temperature production potential of rice,corn and winter wheat were 19 333 kg/hm2,16 689 kg/hm2 and 9 068 kg/hm2,respectively.And climate production potential of rice,corn and winter wheat were 12 810 kg/hm2,11 548kg/hm2 and 5 423 kg/hm2,respectively.The differences of the distribution of production potential in Three Gorges reservoir area were great,the difference of corn in space was the smallest from 29.7% to 52.3%,and the difference of rice in space was 23.4% to 89.6%,and the difference of winter wheat in space was the largest from 49.8% to 92.9%.By improving heat transfer the output of rice would increase 20% approximately,the corn would increase about 10%,and winter wheat would increase by 10%-40%.By improving irrigation the production rate of winter wheat would increase most,the production rate of rice would take the second place,and the production rate of corn would be the least.
【Fund】: 国家科技支撑计划课题(2007BAC29B06);; 国家重点基础研究发展计划(973项目 2006CB400503);; 国家自然科学基金(40705031)资助
【CateGory Index】: S162
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