不同温度处理下水稻高光谱及红边特征分析  

Hyperspectral and Red Edge Characteristics for Rice under Different Temperature Stress Levels

作　　者：程高峰[1,2,3] 张佳华[2] 李秉柏[3] 李萍萍[1] 杨沈斌[4] 王小宁[4] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室,江苏省重点实验室,江苏镇江212013 [2]中国气象科学研究院,北京100081 [3]江苏省农业科学院农业资源与环境研究所,江苏南京210014 [4]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《江苏农业学报》2008年第5期573-580,共8页Jiangsu Journal of Agricultural Sciences

基　　金：国家科技支撑计划(2006BAD04B04);国家“863”项目(2006AA10Z213);国家“973”预研项目(2006CB708410)

摘　　要：通过田间试验,测定了3个温度处理下2个品种的水稻冠层不同生育期高光谱反射率及水稻叶片叶绿素含量等生物物理参数,对水稻叶绿素浓度与温度进行了相关分析,并对不同生育期不同温度处理下水稻冠层光谱的变化规律及红边特征进行了对比。结果表明:叶绿素浓度随温度升高而下降,水稻均在孕穗期近红外肩区的反射率达到最大,其反射率随温度胁迫的加深而下降,但晚上增温情形除外。国稻6号(杂交稻)在不同生育期不同温度处理下的光谱曲线差异比武运粳7号(粳稻)明显。国稻6号在抽穗期红边面积和红边幅值达最大值,在孕穗期红边位置达最大值;除晚上增温情形外,武运粳7号在孕穗期3个红边参数达最大值,受高温胁迫后,红边位置向短波方向移动。The hyperspectral reflectance of the canopy of two varieties of rice were measured by ASD FieldSpec Pro FR in field under three temperature stress levels at different growth stages, and the concentration of chlorophyll of the flag leaves were determined by SPAD-502. The correlation analysis between the concentration of chlorophyll and the correspond- ing temperature treatments were carried out. The red edge parameters and variation characteristics of rice canopy spectra un- der disparate temperature processing at different development stages were analyzed. The concentration of chlorophyll reduced along with the increase of temperature stress, and the spectral reflectance at near-infrared reached the maximum value in booting stage of rice ,except under night calefaction. The reflectance declined along with the temperature stress increasing, and the hybrid rice＇s spectral reflectance difference under disparate temperature stress levels during different stages was obvious than that of the other one. However, the red edge positions moved to near-infrared waveband till booting stage and then declined to visible bands after booting stage.

关 键 词：水稻 高温 高光谱反射率 红边参数 

分 类 号：S511[农业科学—作物学]