土壤氮、磷、钾含量的高光谱遥感探测方法

Soil N,P and K Contents Hyperspectral Remote Sensing Detection

以新疆生产建设兵团共青团团场为研究对象,在地面光谱测试与土壤采样分析测试的基础上,通过分析0. 4～2. 5μm光谱区间的土壤光谱反射率与氮磷钾的含量的相关性,选择相关性最密切的波段,建立其与氮磷钾含量的关系模型。对该区129个测试点的光谱反射率与同步获取的Landsat8 ETM+卫星遥感图像对应波段的反射率进行相关性分析,发现在Landsat8 ETM+的band5区间,相关性最高。进而分析建立利用band5计算获得本区土壤氮磷钾丰度图,为团场的大范围的施肥提供决策依据。

Taking the league farm of Communist Youth League, XPCC as the subject investigated, on the basis of ground surface spectral measurement and soil sampling analysis and testing, through interdependency analysis of soil spectral reflectance within 0. 4 2.5μm spectral interval and N, P, K contents, selected interdependency most closely related wave band, established relationship model between the band and N, P, K contents. Taking spectral reflectanees from 129 test points in the area and synchronously acquired Landsat8 ETM ＋ remote sensing image corresponding band reflectanees carried out correlation analysis. The analysis has found that the Landsat8 ETM ＋ band5 interval has highest interdependency. And then analyzed and established through band5 computation acquired soil N, P and K abundance diagram of the area, thus provided decision - making basis for league farm extensive fertilization.