RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (08): 1279-1285.doi: 10.11870/cjlyzyyhj201608015

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RISK ASSESSMENT ON WINTER WHEAT SUFFERING FROM SPRING WET DAMAGES IN MIDDLE AND LOWER YANGTZE

WU Hong-yan, CAO Lu, LI Juan, GAO Ping   

  1. Jiangsu Province Meteorological Bureau, Nanjing 21008, China
  • Received:2015-12-03 Revised:2016-04-20 Online:2016-08-20
  • Supported by:
    Meteorological Key Program of Technology Integration and Application in China Meteorological Administration (CMAGJ2015M24);Special Fund for Meteorological-Scientific Research in the Public Interest (GYHY201406028);National Science Foundation of China (41371412)

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Abstract: Spring wet damages seriously affect the growth and yield formation of winter wheat in south China. In this paper, a wet damage weather index was constructed with rainfall, sunshine and crop water requirement. From the perspective of winter wheat output loss, the frequency of yield reduction, disaster forming, damage risk intensity were analyzed, a damage intensity risk index model was established based on the frequency and damage risk intensity, and zones were divided according to the risk value. The results show that the southern region of the Yangtze River and western Jianghuai were the areas of high risk of spring wet damages, accounted for about 27% of district stations. The middle risk zone included most regions of Jiangsu and Anhui province, Jianghan plain region, eastern Jianghuai, southern Huaibei and the southeastern Hubei, which accounted for about 47%. The low risk area accounted for about 16% of the all district, mainly distributed in the northern Hubei and northern Huaibei areas.

Key words: winter wheat, spring wet damage, the frequency of yield reduction, damage risk intensity

CLC Number: 

  • S429
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