Influence of agricultural meteorological disasters on output of crop in China

Based on the relevant data of the disaster-affected area,the meteorological condition and the crop output etc in China,distribution and seasonal change of main agricultural disaster area are presented.It is indicated that the drought,flood and,freezing injury are the main agricultural meteorological disasters influencing crops output.These disasters have a obviously increase tendency.The drought is the most serious one in all kinds of disasters,the affected area by drought is 2.3 times of that by flood.Referencing the most serious years with reduced crop output due to the disasters in whole country,the maize and soybean in the northern area are impacted mainly by the drought,the early rice and the late rice in the southern regions are inpacted mainly by the cold injury and floods,winter wheat and cotton producing regions are influenced mainly by cold freeze injury.