干旱地区农业研究Issue(5)：106-111,6.
基于高光谱的水浇地与旱地春小麦拔节期叶绿素含量估测模型对比研究
Comparative study of estimation model on chlorophyll content at jointing stage of spring wheat under different lands based on hyperspectral indices
摘要
Abstract
In order to establish high spectral chlorophyll content model based on correlation analysis between chloro-phyll content and five spectral variables of spring wheat under irrigated and dry land,canopy spectral,chlorophyll con-tent,ground cover,seedling height,leaf width at jointing stage of spring wheat under different land were determined, and the precision of these model were tested .The result showed a positive correlation between chlorophyll content and o-riginal spectrum at visible light and near infrared band of sunny and double slopes at jointing stage of spring wheat,and a negative correlation below 723 nm and a positive correlation above 723 nm for irrigated land and shady slope .There was markedly significant correlation (P<0 .01)between chlorophyll content and hyperspectral variables of spring wheat un-der different lands .Regardless of visible light or near infrared wave band,lg(1/R)was significantly correlated with the leaf chlorophyll content,with a correlation coefficient of 0 .98 .Shady slope was correlated with first derivative (r=0 .94),while for sunny and double slopes normalized difference vegetation index showed significant relationship .For each band,lg(1/R),p′,and N were suitable indexes estimating chlorophyll content for all lands of irrigated land, shady slope,and sunny and double-sided slope .Although the regression determination coefficient R2 was more than 0 . 90,precision and accuracy of the proposed for shady slope,sunny and double slope are slightly lower than that of irrigat-ed land .关键词
高光谱指数/水浇地/旱地/拔节期/叶绿素含量/对比研究Key words
hyperspectral variables/irrigated land/dry land/jointing stage/chlorophyll content/comparative study分类
农业科技引用本文复制引用
靳彦华,熊黑钢,张芳,王莉峰..基于高光谱的水浇地与旱地春小麦拔节期叶绿素含量估测模型对比研究[J].干旱地区农业研究,2014,(5):106-111,6.基金项目
国家自然科学基金（41171165）；北京联合大学人才强校计划人才项目（BPHR2012E01）；北京市属高等学校高层次人才引进与培养计划项目 （）
