高光谱与叶绿素计快速测定大麦氮素营养状况研究  

Study on Determining Nitrogenous Levels of Barley by Hyperspectral and Chlorophyll Meter

作　　者：唐延林[1] 王人潮[1] 张金恒[1] 王珂[1] 

机构地区：[1]浙江大学农业遥感与信息技术应用研究所,杭州310029

出　　处：《麦类作物学报》2003年第1期63-66,共4页Journal of Triticeae Crops

基　　金：国家自然科学基金 (3 0 0 70 44 4);浙江省自然科学基金 (4 980 15 )资助

摘　　要：为了寻找一种简便、快速、非接触性的方法测定作物氮素营养状况 ,通过田间试验 ,利用光谱仪和叶绿素计测量了不同氮素水平及不同时期大麦 (秀麦 3号、浙农大 3号 )的冠层光谱及叶片 SPAD值 ,在此基础上分析了大麦冠层光谱特性及一阶导数光谱、红边、叶片 SPAD值与氮素水平之间的相关性。结果表明 ,大麦冠层光谱及其一阶导数光谱和红边与氮素水平存在显著相关 ,不同供氮水平下叶片的 SPAD值具有显著性差异 ,叶片 SPAD值与氮素水平之间的相关系数在孕穗期均达到 0 .75以上 ,相关达 0 .0 1显著水平 ,从而说明可以通过光谱法来测定大麦的氮素水平。To look for a simple, quick and untouched method to check the level of nitrogen in crops, we determined the canopy spectra and SPAD values of barley leaves (Xiumai 3 and Zhenongda 3) at different nitrogenous levels and different periods by using spectroradiometer and chlorophyll meter through field test, and analysed spectra characteristics of barley canopy and the correlation between the nitrogenous level and first derivative spectra, red edge, SPAD values of leaves. The results showed that there were significant correlation among the canopy spectra, the first derivative spectra, red edge and nitrogenous levels . There were significant difference for the SPAD values of the barley leaves under different nitrogen support levels . The correlate coefficient between SPAD values of leaves and nitrogenous levels was above 0.75 and the correlation was significant at the 0.01 level. This result proved that the nitrogenous level could be diagnosed by spectral method.

关 键 词：光谱 叶绿素计 大麦 氮素 营养状况 

分 类 号：S512.3[农业科学—作物学]