利用卫星资料监测玉米生长期水分供应状况的研究

A Study on Monitoring the Status of Water Supply During the Growing Periods of Corn Using Satellite Data

根据作物干物质增长速度曲线，利用迭代法求出最佳气候条件下的最大干物质累积量，进而求出最佳气候条件下的干物质累积速度。根据干物质累积速度与绿度值的关系求出最佳气候条件下的最大绿度值作为标准绿度值。以每年的绿度值的１．６次方与标准绿度值的１．６次方的比并除以温度订正系数求出水分系数，以此来评价玉米生长期水分供应状况。

ccording to the growth curve of dry matter, the maximum accumulated quantity and accumulative rate of dry matter under the optimum climatic conditions were calculated by using iterative method. Then, based on the relationship between the rate of greenness and the rate of accumulated dry matter, the maximum greenness was derived as the standard greenness. The ratio between the 1.6th power of greenness per year and the 1.6th power of standard greenness is divided by temperature correcting coefficient, water coefficient can be obtained. It is a water coefficient that is used for calculation of the water supply status during the growing periods of corn.