玉米冠层全光谱特征在不同施氮量和品种下的响应  

Responses of Corn Canopy Full Spectrum Characteristics under Different Nitrogen Amount and Varieties

作　　者：赵明家[1] 张忠庆[1] 李志洪[1] 

机构地区：[1]吉林农业大学资源与环境学院,长春130118

出　　处：《吉林农业大学学报》2014年第3期327-332,共6页Journal of Jilin Agricultural University

基　　金：吉林省科技发展重点项目(20120208);国家自然科学基金项目(40671124)

摘　　要：采用光谱分析方法对生长在东北黑土上的大喇叭口期春玉米进行了不同施氮量、不同品种的冠层光谱特征研究。结果表明：不同施氮量下玉米冠层全光谱曲线图具有类似的趋势,350～500 nm和640～660 nm波段内反射曲线随着施氮水平的增加呈上升趋势,光谱反射率在不同波段差异较大,在可见光波范围内,350～500 nm波段内N2处理光谱反射率普遍高于其他处理,在500～650 nm附近反射率N0〉N3〉N2〉N1,反射曲线呈先下降后上升趋势排列;在750～1 350,1 450～1 800,2 000～2 350 nm波段内的玉米冠层光谱特征在不同施氮量下也呈现不同的趋势;施氮量对750～1 350,1 450～1 800,2 000～2 350 nm波段内的玉米冠层光谱特征有一定程度的影响;正常施氮量条件下不同品种玉米全光谱曲线在整个波段的趋势均一致,聚类分析显示不同玉米品种在不同波段光谱反射率差异较大。Using the method of spectral analysis,in the bell mouth period of black soil spring corn,canopy spectral characteristics under different N application and different varieties were studied.The results showed that the corn canopy full spectrum graph under different N application has a similar trend,and reflection curve within 350—500 nm and 640—660 nm increases with the increase of nitrogen level.Spectral reflectivity is greatly different at different wavelengths,and within the scope of visible light,N2 treatment within 350—500 nm is generally higher than that of other spectral reflectance,near the 500—650 nm reflectivity is N0 〉N3 〉N2〉 N1,and reflection curves are arranged to first show a falling then rising trend;In 750—1 350 nm,1 450—1 800 nm and 2 000—2 350 nm bands,corn canopy spectral characteristics under different N application amount also show a trend of difference;N application amount has certain effects on corn canopy spectral characteristics of 750—750 nm,1 350—1 800 nm and 2 000—2 350 nm bands;Full spectrum curve of different corn variety under normal N application conditions in the whole band is consistent.Clustering analysis shows that spectral reflectance of different maize varieties in different bands is greatly different.

关 键 词：玉米冠层 全光谱 施氮量 品种 响应 

分 类 号：S513[农业科学—作物学] S143.1