| Using the method of climate model BCC-T63 jointly with crop model WOFOST,and based on the experiment data of many years and suitability test,simulation and analysis were carried out about the change of the growth and yield of the main crops in China under climate change.The main crops included maize in Northeast China,winter wheat in North China,and double-season rice in South China.The Northeast region lies from 120 to 135 degrees east longitude from 40 to 50 degrees north latitude,mainly including three provinces: Helongjiang,Jilin and Liaoning;The North China is situated from 111 to 123 degrees east longitude and from 35 to 41 degrees north latitude,mainly including Jing,Jin,Ji and Lu area;The South China is located from 109 to 120 degrees east longitude and from 25 to 30 degrees north latitude,mainly including the provinces of Hunan,Hubei and Jiangxi.The results showed: the life time of maize in Northeast China will be shortened,the lifetime of medium maize will be shortened by 3.8 days,that of the late maize will be shortened by 1.4 days,the yields of maize also will be decreased to a different extent,medium maize will be reduced by 3.3 percent,late maize reduced by 2.7 percent;The life time of winter wheat in North China will be shortened by 8.4 days,and the yields of winter wheat also will be decreased by 10.1% to a different extent;The lifetime of early rice in South China will be shortened by 4.9 days,that of late rice will be shortened 4.4 days,the change range of early rice from 1.9 to 9.5 percent,meanly reduced by 3.6 percent,and the change range of late rice from 2.2 to-7.3 percent,meanly reduced by 2.8 percent. |