氮素胁迫下寒地玉米高光谱特征研究  

Study on hyperspectral characteristics on the corn in cold area under nitrogen stress

作　　者：王树文[1] 赵珊[1] 张长利[1] 董守田[1] 赵越[1] 王丽凤[1] 邢晨[1] 

机构地区：[1]东北农业大学电气与信息学院,哈尔滨150030

出　　处：《东北农业大学学报》2015年第2期89-93,共5页Journal of Northeast Agricultural University

基　　金：国家"863"项目(AA2013102303);黑龙江省博士后科研启动基金(LBH-Q13022);东北农业大学研究生科技创新基金(yjscx14003);黑龙江省教育厅科技项目(12521038)

摘　　要：利用高光谱近地遥感技术,采集不同氮素水平下的不同生育期的寒地玉米冠层高光谱图像,采用ENVI软件提取玉米冠层的光谱反射率。结果表明,不同氮素水平下寒地玉米冠层反射率存在较大差异,玉米"红边"具有双峰现象,红边位置呈"红移"现象;根据玉米冠层高光谱反射率以及红边位置峰值可定性区分严重缺氮、正常施氮和过量施氮。Using hyperspectral remote sensing technology, experiments were set up in fields to collect different growth period hyperspectral images of maize canopy under different nitrogen levels and reflectance of corn canopy is extracted by ENVI software. The results showed that there were differences in different nitrogen levels for reflectance of corn canopy. There were ＂two peaks＂ phenomena for the red edge of canopy spectra of corn. There were ＂red shift＂ phenomena for the position of red edge. According to the maize hyperspectral reflectance and the peak of red edge position, it could be qualitatively distinguished for seriously deficient in nitrogen and normal nitrogen and excess nitrogen.

关 键 词：玉米冠层 高光谱反射率 氮素 红边参数 

分 类 号：S855.12[农业科学—临床兽医学]