基于不同玉米品种叶片高光谱的SPAD值估测模型研究  

Estimation Model of SPAD Value Based on Hyperspectral of Different Maize Varieties

作　　者：高鑫[1] 高聚林[1] 于晓芳[1] 王志刚[1] 张宝林[2] 胡树平[1] 谢岷[1] 孙继颖[1] 罗瑞林[2] 吕福虎 陈广庭[1] 王富贵[1] 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010018 [2]内蒙古师范大学,呼和浩特010022 [3]包头市农业科学研究所,内蒙古包头014030

出　　处：《玉米科学》2016年第2期108-114,共7页Journal of Maize Sciences

基　　金：国家粮食丰产科技工程(2011BAD16B13;2012BAD04B04;2013BAD07B04;2011BAD16B14);国家玉米产业技术体系(CARS-02-63);内蒙古自治区主席基金;内蒙古自治区主席基金及科技厅重大专项(内蒙古自治区中加饲用作物试验与示范项目)

摘　　要：通过研究不同玉米品种叶片SPAD值与高光谱参数的关系,建立玉米叶片SPAD值估测模型,并对模型进行品种间精度检验。通过两年试验,测定不同玉米品种的叶片SPAD值及其高光谱数据,综合分析叶片SPAD值与高光谱反射率、反射率一阶导数及其光谱参数的相关关系,对玉米叶片SPAD值估测模型进行构建。玉米叶片SPAD值与高光谱反射率最敏感波段在550和710 nm附近,反射率一阶导数最敏感波段出现在500～750 nm范围内。叶片SPAD值与单波段反射率的相关性要高于其一阶导数,以550 nm附近光谱反射率构建的模型对大多数品种的叶片SPAD预测值平均误差最小。By studying the relationship between the leaf SPAD values of different kinds of maize and high spec-tral parameters, estimate models of the leaf SPAD values in maize were established and accuracy tests among variet-ies were done to get generally applicable and higher precision models. Through 2 years＇ experiments, the leaf＇sSPAD value and the hyperspectral data of different kinds of maize were measured, the experiment also comprehen-sively analyzed the leaf＇s SPAD value, high spectral reflectivity, reflectivity first derivative and its correlation rela-tionship of spectrum parameters, and the estimating model of the leaf＇s SPAD value in maize was built. The resultshowed that the most sensitive waveband of the leaf＇s SPAD value in maize and hyperspectral reflectivity existed inthe near 550 nm and 710 nm, and between the leaf＇s SPAD value in maize and the first derivative of reflectivity, themost sensitive waveband were in the range of 500 nm to 750 nm. The correlation of leaf＇s SPAD value and the sin-gle waveband reflectivity was higher than its first derivative, and the precision of the model which was based on thespectral parameters 550 nm relative error on average was the least.

关 键 词：玉米 叶片 SPAD值 高光谱特征 估测模型 精度检验 

分 类 号：S513.01[农业科学—作物学]