夏玉米长势卫星遥感动态监测指标研究

Dynamic Monitoring on the Summer Maize Growth Based on Satellite Remote Sensing

通过野外样点布设获取地面农学参数平均株高、群体密度、干物重和叶面积指数,经过频数统计分析,获得夏玉米一、二、三类苗苗情农学指标。结合MODIS遥感数据,进行农学参数和归一化植被指数(NDVI)的相关分析,结果显示,NDVI和平均株高、叶面积指数以及生物量都呈显著正相关,其中NDVI和叶面积指数关系最为显著(各生育期R2>0.623),因此可通过建立叶面积指数和NDVI的关系确定夏玉米长势遥感指标,为大面积遥感监测夏玉米长势提供科学依据。

Through field sample points to obtain ground agronomic parameters of average plant height, population density, dry weight and leaf area index. After statistical analysis, obtain three categories agronomy indexes. Combined with the MODIS remote sensing data, conduct agronomic parameters and NDVI correlation analysis. The results showed that NDVI and average plant height, leaf area index and biomass had significant positive correlation, NDVI and leaf area index was the most significant correlation（R2 〉 0.623 at each growing period）. Therefore, summer maize growth remote sensing index was established through the relationship between leaf area index and NDVI, and provide the scientific basis for monitoring large area summer maize growth.