Risk Division of Spring Frost Damage in Winter Wheat in Henan Province by Quantitative Analysis of Disaster Effects
Yu Weidong
Hu Chengda
Zhang Xuanyu
Wang Wei
Abstract：According to the spring frost index and disaster degree index,the probability and degrees of winter wheat frost disaster were analyzed using the crop data of winter wheat and daily meteorological data from 1981 to 2008 at 30 agrometeorological observation stations in Henan province.By adding the effects of spring frost on growing and development of winter wheat in WOFOST crop model,quantitative analysis of spring frost effects was realized.Three evaluation factors of danger,exposure and fragility of spring frost were selected as the risk factors,and the corresponding risk evaluation model of spring frost damage was established.According to the risk index of spring frost,five levels of the spring frost risk were divided for the whole winter wheat planting area of Henan province,which was high risk region,sub-high risk region,medium risk region,sub-low risk region and low risk region.The results showed that the regions with risk index higher than 0.6 mainly distributed at the counties of Shenqiu,Lushi and Linzhou,while the regions with risk index lower than 0.2 mainly distributed at the counties of Yichuan,Gongyi,Xinyang,Nanyang,Taikang,Puyang and Qixian.
Keywords：spring frostWOFOST modelidentification of the loss caused by disastersindex of risk assessmentrisk division
Publication Date：2017-07-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 1-6 )