河南省冬小麦长势遥感监测指标的适宜性

为了解不同监测指标在河南省各个监测地域分区中对小麦不同生育期长势监测的有效性和适宜性，以MODIS为主要数据源，在长势监测地域分区的基础上，从小麦实时监测和生长过程监测两个角度出发，对NDVI、LAI、NPP、NDWI和TCI等监测指标与长势等级和单产进行了相关分析。结果表明，在各长势监测地域分区中，NDVI、LAI和NPP都与长势等级呈负相关，与单产呈正相关，一般在抽穗期和开花期相关性最高。NDWI在各个监测分区都表现不稳定，且在不同生育期与长势等级和单产的相关性也较低。TCI在豫西山地丘陵区和豫南地区与长势等级呈正相关，与单产呈负相关，相关性在起身期和拔节期相对较高。说明，不同长势监测分区需要用不同监测指标进行长势监测，在同一长势监测分区不同生育期遥感监测的适宜指标也存在差别。

Study on the Suitability of Remote Sensing Monitoring Indices for Winter Wheat Growth in Henan Province

Through analyzing the correlations between NDVI, LAI, NPP, NDWI, TCI and growth levels and yield in different growth stages, the suitability and validity of five monitoring indices in different zones were studied both in real time monitoring and growing process monitoring based on MODIS remote sensing data. The results showed that NDVI, LAI and NPP were negatively related to growth levels and positively related to yields, and the highest correlation was at heading and anthesis stages. The correlation with NDWI was unstable and less in each zone. TCI was positively related to the growth levels and negatively related to yields, and the highest correlation was at standing and jointing stages in the western hilly regions and southern of Henan province. These results indicated that the suitable growth monitoring indices in different zones and at different growth stages were different. These results could provide an important technical support for monitoring of growth of wheat in Henan province.