RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (10): 1523-.doi: 10.11870/cjlyzyyhj201710022

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CHANGE TREND OF AGRICULTURAL METEOROLOGICAL DISASTERS #br# AND THE RELATIONSHIP WITH GRAIN YIELD IN RECENT 45 YEARS

YU Xiaobing1,2, LU Yiqun2,JI Zhonghui2, LUO Xiang2,CAI Mei2   

  1. (1. Research Institute for History of Science and Technology, Nanjing University of
    Information Science & Technology, Nanjing 210044, China;2. School of Economics and Management,
    Nanjing University of Information Science & Technology, Nanjing 210044, China)
  • Online:2017-10-20

Abstract: China is one of the most serious countries suffering meteorological disasters in the world. Based on datasets from the Management Division of Ministry of Agriculture,  we analyzed the agricultural meteorological disasters of China in the past 45 years. The results show that the largest covered and affected areas were mainly concentrated in  Heilongjiang province, Shandong province and Henan province; Shan Xi province and Inner Mongolia province experienced the highest hazard rates. Among other disasters, drought is  the main meteorological disaster in China. There is an obvious fluctuation for the flood disaster. The typhoon disaster continues to rise in coastal areas. The percentage of  drought disaster has increased and low temperature has been reduced in Northeast of China. The percentage of low temperature and hail disaster has risen in East of China. There has been an upward trend of typhoon disaster in South of China. The percentage of hail and low temperature disasters show a smaller growth in the Northwest of China. The trend  of drought and flood disasters are opposite in the Southwest of China. Drought disaster has eased and flood has increased in the central of China. The relation between  meteorological disasters and food production were examined using the partial correlation method. The meteorological disasters directly influenced the grain yield especially  during 1990-2009. The relationship between meteorological disasters and food production showed firstly an increasing trend then followed by a decreasing trend.
Key words:meteorological disasters; food production; disaster affected area; partial correlation

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