基于改进的层次分析法的加权VTCI与冬小麦产量的相关性分析

Selecting drought monitoring results of Vegetation Temperature Condition Index (VTCI) in the key growth and development stages of winter wheat in the Guanzhong Plain, weighted VTCI values of five cities in the Guanzhong Plain were calculated by using the improved analytic hierarchy process method. The relationship between weighted VTCI values and wheat yields is analyzed by employing the linear regression model, and as well as the distribution and variation of drought and wheat yields. The results show there is significant correlation between weighted VTCI values and wheat yields. Weighted VTCI can accurately reflect the drought and prove that VTCI is feasible to monitor drought in the Guanzhong Plain. The results of yield estimation model can precisely display the distribution of wheat yield in the Plain and prove the feasibility of crop yield estimation by using VTCI approach.