基于红边谱段的草地品质评价方法研究

草地资源是我国畜牧业发展的坚实基础.但由于长期不合理的开发利用,导致全国近90％的可利用草地都存在不同程度的退化.因此及时准确地监测草地生长状况和掌握反应草地生势的品质参数,对草地管理具有重要的现实意义.近年来,随着遥感技术的不断发展,越来越多的高分辨率卫星增加了红边谱段.红边谱段对受病虫害影响的植被反映较为明显,且受...

Method of Grassland Quality Evaluation Based on Red-Edge Spectrum

Grassland resources are the firm foundation for development of the country's animal husbandry.However, unreasonable development and utilization over the years has caused nearly 90% of the available grassland to experience varying degrees of degradation. Therefore, accurate and timely monitoring of grassland growth and mastering the quality parameters that reflect the growth of grassland are important for grassland management. In recent years, with the continuous development of remote sensing technology, many high-resolution satellites have added red-edge spectrum bands. Because it reflects more clearly on vegetation affected by plant diseases and insect pests, and is less affected by background, it is widely used in vegetation quality research. Based on the B4 red edge band in Jilin No. 1 remote sensing image, the significant expression characteristics of vegetation are analyzed and studied, and the GQI (Grassland Quality Index) is constructed.Compared with the single vegetation index, this index can more comprehensively measure the advantages and disadvantages of different indicators of grassland quality. The vegetation index with high correlation with grassland quality is calculated. The principal component analysis is carried out to obtain the scoring formula of GQI, and the grassland quality index results are calculated. The results show that the 80% of grassland in Xianghai Nature Reserve is of medium quality and the range of grassland with good growth status accounts for