摘要
分析了在不同氮肥施用水平下,小麦冠层的高光谱响应在几个生育期内的变化情况,以及它们与小麦产量之间的关系。采用微分技术处理了小麦冠层反射光谱,提高了其区分小麦氮素营养水平的灵敏性;利用F-检验及方差分析与相关分析,研究小麦氮素处理水平、冠层反射光谱及其衍生信息(光谱反射率的一阶微分数据、归一化植被指数)、小麦产量三者之间的相关关系。研究结果表明,一阶微分技术能够提高小麦冠层光谱数据对氮素营养水平的响应,光谱数据的衍生形式也可与小麦产量建立很好的回归方程。
We studied hyper - spectral reflectance data of growth - development periods under different N levels and relationships between the reflectance data and wheat yields. Derivative spectrum technique was applied to enhance the wheat canopy reflectance responsibility to different N levels. By F - test, variance analysis, correlation analysis, the correlation between, canopy spectral reflectance formations (derivatives, NDVI) and yield were analyzed. The results indicated that the derivative of hyper - spectral reflectance could increase the ability of distinguishing the N levels and the formations of hyper - spectral reflectance data could also be used in setting up a regression equation to predict wheat yield.
出处
《土壤通报》
CAS
CSCD
北大核心
2005年第1期26-29,共4页
Chinese Journal of Soil Science
基金
由中国科学院知识创新工程重要方向项目K2CX2-404"863"项目2001AA245013资助
关键词
小麦
氮素水平
冠层高光谱反射
微分
相关性
Wheat
N levels
Canopy hyper - spectral reflectance
Derivative
Correlativity
