典型保供作物生育期高光谱时序特征分析——以水稻为例  

Hyperspectral Time Series Characteristics of Typical Guaranteed Crop in Growth Periods:Taking Rice as an Example

作　　者：王小攀 马泽忠 罗鼎 张斌 WANG Xiaopan;MA Zezhong;LUO Ding;ZHANG Bin(Chongqing Geomatics and Remote Sensing Application Center,Chongqing 401120)

机构地区：[1]重庆市地理信息和遥感应用中心,重庆401120

出　　处：《现代农业科技》2023年第16期163-166,共4页Modern Agricultural Science and Technology

基　　金：重庆市科研机构绩效激励引导专项(cstc2021jxjl00024)。

摘　　要：为进一步挖掘高光谱识别耕地种植属性的能力,掌握典型保供作物在不同生育期时序上的光谱特征,本研究以重庆市南川区大观镇某水稻田为试验区,重点分析了孕穗期、抽穗期、灌浆期和成熟期4个生育期水稻叶光谱的变异系数、光谱特征参量以及光谱一阶导数与氮含量的相关性。结果表明:光谱变异系数在孕穗期最高、灌浆期最低,可见光和短波红外范围变异系数大于其他波段;各生育期“三边”及红谷、绿峰位置变化不大,但是在水稻发育后期,红边位置向短波方向偏移,出现“蓝移”现象;光谱一阶导数与氮含量具有较强的相关性,灌浆期光谱一阶导数与氮含量相关性最大。In order to further explore the identification ability of hyperspectrum on the cultivated land plantingattributes and grasp the hyperspectral time series characteristics of typical guaranteed crop in different growth periods,this study took a rice field in Daguan town,Nanchuan District,Chongqing City as the experimental area,and focused onthe analysis of the coefficient of variation(CV) of rice leaf spectrum,spectral characteristic parameters and thecorrelation between the first derivative of spectra and nitrogen content at booting stage,heading stage,filling stage andripening stage.The results showed that CV was the highest at booting stage and the lowest at filling stage,CV of visiblelight and short-wave infrared was higher than that of the other bands.The position of“three sides”,red valley and greenpeak changed little in each stage,but the red side shifted to short wave and appeared“blue shift”in the later period ofrice growth.The first derivative of spectra had strong correlation with the nitrogen content,the correlation at filling stagewas the greatest.

关 键 词：耕地 种植属性 水稻 高光谱 时序特征 

分 类 号：S127[农业科学—农业基础科学]