基于无人机的烟草氮元素定量反演与空间差异分析  

Quantitative Inversion and Spatial Difference Analysis of Tobacco Nitrogen Based on UAV

作　　者：梁雪映 冯珊珊 郭颖 王塞 伍建恒 郭治兴 樊风雷 LIANG Xueying;FENG Shanshan;GUO Ying;WANG Sai;WU Jianheng;GUO Zhixing;FAN Fenglei(National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China,Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management,Institute of Eco-environmental and Soil Sciences,Guangdong Academy of Sciences,Guangzhou 510650,China;School of Geography,South China Normal University,Guangzhou 510631,China)

机构地区：[1]广东省科学院生态环境与土壤研究所,华南土壤污染控制与修复国家地方联合工程研究中心,广东省农业环境综合治理重点实验室,广州510650 [2]华南师范大学地理科学学院,广州510631

出　　处：《热带地貌》2020年第2期18-26,共9页Tropical Geomorphology

基　　金：广东省烟草专卖局科技项目(粤烟科项201705);广东省科技计划项目(2018B030320003);2019年广东省省级农业科技创新及推广项目(2019KJ147)

摘　　要：氮含量是反映烟草生长状况和烟叶品质的重要指标之一。实时快速监测烟草氮含量对于制定施肥策略和提高农田氮肥精准管理效率意义重大。本文以粤北始兴县烟田示范片为研究区,基于无人机多光谱遥感,利用6个时相的烟叶样本实测氮含量与其光谱特征参数(NRI、光谱夹角参数),分别构建了旺长期和成熟期的烟草氮含量反演模型,并进行精度验证。精度验证结果显示,旺长期R2为0.68,RE为10.51%;成熟期R2为0.71,RE为9.38%。这说明通过无人机多光谱遥感进行烟田氮元素定量反演,能够实时、有效、快速地监测烟草氮含量。Nitrogen content is one of the most important indexes reflecting tobacco growth and quality.It is of great significance for fertilization strategies development and precision management of nitrogen fertilizer.In this paper,Shixing tobacco field demonstration plot in northern Guangdong was taken as the research area.Base on UAVRS,measured nitrogen of tobacco samples and its spectral characteristics(NRI and spectral angle parameters)from 6 periods were used to constructed the inversion model of tobacco nitrogen content in fast-growing stage and mature stage respectively and their accuracy were verified.The result of accuracy validation shows that the fast-growing stage model has a coefficient of determination(R2)of 0.68 and relative error of 10.51%,and the mature stage was 0.71 and 9.38%respectively.Therefore,it proves that quantitative inversion of tobacco nitrogen based on UAV multi-spectral remote sensing can monitor tobacco nitrogen content in real time,effectively and rapidly.

关 键 词：氮含量 无人机 定量反演 烟草 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]