基于WI指数的玉米涝渍胁迫程度指数适宜性分析OA

The crop waterlogging degree index(WI)has been primarily validated for assessing waterlogging stress in wheat,yet its applicability for characterizing waterlogging stress in maize remains unclear.Based on published experimental data of maize waterlogging stress,this study systematically analyzed the relationship between the WI index and the relative yield of maize under single waterlogging,single submergence,and sequential submergence-waterlogging treatments,based on published experimental data of maize waterlogging stress.The results showed that under different waterlogging stress treatments,the WI index exhibited a highly significant linear negative correlation with the relative yield of maize.The multiple correlation coefficients for all fitted samples were above 0.74.Like the traditional SDI index,the WI index was also effective in quantifying the comprehensive waterlogging stress degree throughout the entire maize growth period.Therefore,the WI index can be extended as a universal indicator for crop waterlogging stress,providing a theoretical basis for large-scale agricultural waterlogging disaster monitoring.