Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2021, Vol. 11 ›› Issue (3): 12-19.doi: 10.11923/j.issn.2095-4050.cjas20190400017

Special Issue: 小麦 农业气象

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Winter Wheat in Henan: Drought Index Characteristics and Risk Assessment

Yan Yuqian1,2(), He Zhaoxiangrui2, Zhu Keyun2()   

  1. 1Qinghai Institute of Meteorological Science/Key Laboratory of Disaster Prevention and Mitigation in Qinghai Province, Xining 810001, Qinghai, China
    2College of Atmospheric Science, Chengdu University of Information Technology/Key Laboratory of Plateau Atmosphere and Environment in Sichuan, Chengdu 610225, Sichuan, China
  • Received:2019-04-30 Revised:2019-10-17 Online:2021-03-20 Published:2021-04-07
  • Contact: Zhu Keyun E-mail:yan_yq1113@sina.com;zhuky@cuit.edu.cn

Abstract:

To study the effect of drought on winter wheat yield, evaluate the damage caused by drought, based on data of climate and winter wheat yield of Henan Province, as well as the irrigation data of Shangqiu, we analyzed the meteorological conditions of winter wheat during each development period, and discussed the spatio-temporal distribution characteristics of winter wheat drought by Z index, and carried out the drought risk zoning of winter wheat in Henan. The results showed that: (1) the precipitation conditions of winter wheat in abundant and poor years in Henan varied greatly from east to west, the precipitation >263 mm (284 mm) during the whole growth period in the east (west) was conducive to the growth and yield of winter wheat; (2) in terms of time distribution, Z index showed a downward trend in Henan during 1965-2014, tending to drought; in terms of space, it showed a decreasing trend from northwest to southeast; (3) the drought risk in Henan was decreasing gradually from west to east.

Key words: Winter Wheat, Drought Index, Z Index, Risk Zoning, Risk Assessment, Henan

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