基于无人机多光谱遥感的华北地区夏玉米LAI监测  

Study on LAI Monitoring of Summer Corn in North China Based on UAV Multispectral Remote Sensing

作　　者：张恒瑞 段喜明[1] 魏征[2,3] 张宝忠[2,3] ZHANG Hengrui;DUAN Ximing;WEI Zheng;ZHANG Baozhong(College of Forestry,Shanxi Agricultural University,Taigu 030801,China;State Key Laboratory of Simulation andRegulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;National Center for Efficient Irrigation Engineering and Technology Research-Beijing,Beijing 100048,China)

机构地区：[1]山西农业大学林学院,山西太谷030801 [2]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [3]国家节水灌溉北京工程技术研究中心,北京100048

出　　处：《山西农业科学》2021年第5期608-614,共7页Journal of Shanxi Agricultural Sciences

基　　金：“十三五”国家水体污染与控制重大专项课题(2017ZX07101004);国家重点研发计划项目(2017YFC0403202,2019YFC0609203);国家自然科学基金项目(51822907);中国水利水电科学研究院基本科研业务费专项(0145B102019)。

摘　　要：为了探索与建立一种可以快速实现估测夏玉米LAI的无人机多光谱遥感监测模型,以北京市大兴区夏玉米为研究对象,基于无人机多光谱遥感,分别建立LAI-多光谱混合指数优选模型,并进行精度评价。结果表明,随施肥梯度增加,各生育期LAI均在增大;随生育期推进,LAI呈现先急剧增大再逐渐减小的趋势;依据LAI与多光谱混合指数,分别建立的各生育期多元回归优选模型中,建模R2均大于0.6,拟合度较高,各生育期验证模型的R2均大于0.6,除拔节期MAE小于0.1外,其他生育期MAE均处于0.1~0.4,各生育期RE均在0.1附近,精度较高。无人机多光谱遥感对于夏玉米LAI反演研究效果较好,在继续深入研究的基础上,有助于进一步应用于华北地区夏玉米生长监测研究,为精准农业的实现提供一定技术支撑。To explore and establish a multi spectral remote sensing monitoring model for UAV that could quickly estimate LAI of summer maize,this study took summer maize in daxing district of Beijing as the research object,and established LAI multispectral mixed index optimization model based on UAV multi spectral remote sensing,and evaluated the accuracy.The results showed that with the increase of fertilization gradient,LAI in each growth period increased,and with the development of growth period,LAI increased sharply at first and then decreased gradually.According to LAI and multispectral mixed index,the R2 of modeling was greater than 0.6,and the fitting degree was higher.R2 of validation model was greater than 0.6,MAE of other growth stages was between 0.1 and 0.4,except that MAE was less than 0.1 at jointing stage.RE of each growth period was around 0.1,the accuracy was higher.UAV multispectral remote sensing has better effect on summer maize LAI inversion.On the basis of further research,it will be helpful for further research on summer maize growth monitoring in North China,and provide technical support for the realization of precision agriculture.

关 键 词：无人机多光谱 夏玉米 叶面积指数 冠层反射率 植被指数 

分 类 号：S513[农业科学—作物学]