不同品种核桃叶片含水量与高光谱反射率的相关性差异分析  

Analysis of Correlation and Differences between Leaf Moisture and Hyperspectral Reflectance among Different Walnut Varieties

作　　者：潘庆梅 张劲松[1,2] 张俊佩[1] 孟平[1,2] 汪贵斌[2] 杨洪国 王鑫梅 原文文 周宇 PAN Qing-mei;ZHANG Jin-song;ZHANG Jun-pei;MENG Ping;WANG Gui-bin;YANG Hong-guo;WANG Xin-mei;YUAN Wen-wen;ZHOU Yu(Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China;Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]中国林业科学研究院林业研究所,北京100091 [2]南京林业大学南方现代林业协同创新中心,江苏南京210037

出　　处：《林业科学研究》2019年第6期1-6,共6页Forest Research

基　　金：北京市科技计划课题(Z161100000916011);国家科技支撑计划课题(2015BAD07B05)

摘　　要：[目的]探究不同品种核桃(Juglans regia L.)叶片含水量与叶片高光谱反射特征的相关性,分析品种间差异,为核桃叶片水分的准确诊断提供参考。[方法]本研究以5个不同品种的核桃叶片为研究对象,测定了脱水过程中叶片水分含量及其同步反射光谱响应曲线,分析并对比了不同品种核桃叶片含水量与光谱反射率的相关关系,探讨了核桃叶片水分敏感波段的品种间差异。[结果]表明:(1)不同品种核桃叶片的构成物质与叶片结构相似,在叶绿素和水分含量上存在差异;(2)核桃叶片含水量与叶片反射率的相关关系不受水分表征量的影响,在621~703、1244~2500 nm范围内各品种核桃叶片含水量与反射率均呈显著相关关系(p<0.05);(3)在704~1243 nm范围内,不同品种核桃叶片具有不同的水分敏感波段,各品种间差异明显。[结论]不同品种核桃叶片含水量与高光谱反射率的相关关系在704~1243 nm范围内具有明显的品种间差异。[Objective]To explore the correlation between leaf moisture and leaf hyperspectral reflectance characteristics among walnut(Juglans regia L.)varieties and the differences among varieties.[Method]The leaves of five walnut varieties were selected as the test materials,the leaf moisture and hyperspectral reflectance during the dehydration process were measured,and the correlation between leaf moisture and hyperspectral reflectance were analyzed.The differences in the water sensitive bands among walnut varieties were compared.[Result](1)The leaf constituents and the leaf structure among walnut varieties were similar,and only the differences in chlorophyll and moisture content were observed;(2)The correlation between leaf moisture and reflectance among walnut varieties was significant(p<0.05)in 621-703 nm and 1244-2500 nm,and was not affected by moisture indicators;(3)The leaf reflectance showed obvious differences among walnut varieties,and had different water-sensitive bands in 704-1243 nm.[Conclusion]The differences in the correlation between water content and hyperspectral reflectance of leaves are significant among walnut varieties in the range of 704-1243 nm.

关 键 词：核桃 叶片含水量 高光谱反射率 品种 差异 

分 类 号：S718.51[农业科学—林学] S792.13