苹果树冠氮素含量高光谱探测机理与模型研究

项目名称： 苹果树冠氮素含量高光谱探测机理与模型研究

项目编号： No.41271369

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 朱西存

作者单位： 山东农业大学

项目金额： 90万元

中文摘要： 苹果树氮素含量对苹果产量品质有非常重要的影响。传统的氮素检测方法无法满足对大面积果树快速、无损监测的需要，研究苹果树冠氮素含量的高光谱遥感探测机理与定量关系模型，对快速、无损的果树养分科学管理具有十分重要的理论意义和实际应用价值。在前期相关研究的基础上，本项目拟针对不同生育期不同树龄的苹果树、尤其以盛果期的苹果树，通过对树冠不同部位的叶片、采用不同探测角度对树冠、树冠与背景土壤混合的高光谱探测，揭示树冠氮素含量的高光谱探测机理；结合同步氮素含量实验室测定结果，系统分析苹果树冠叶片、纯树冠和冠层等不同层次的高光谱数据与氮素含量的定量关系，建立基于高光谱数据的氮素含量定量关系模型；利用独立试验数据，评估与验证模型的精度，实现苹果树氮素含量的快速、无损高光谱监测，为苹果树精准化与信息化养分科学管理提供理论依据和技术支撑。

中文关键词： 高光谱遥感；氮素含量估测；苹果树叶片和冠层；估测模型；高光谱特征

英文摘要： The nitrogen content of the apple tree has very impotant influence on the yield and quality of the apple tree,and the traditional nitrogen determination method can not meet with rapid and nondestructive monitoring for large-area fruit tree.The research about the hyperspectral remote sensing detection mechanism and quantitative relation model of the apple tree nitrogen content is very important theoretical and practical application value for quick and nondestructive scientific managerment of the apple tree nutrient.Based on the previous related research,this project aims at different growth periods and different age of the apple tree,especially in full apple crown,detecting hyperspectral data about the leaves at different parts,using different angles detection the the apple tree crown,crown and the background soil mixture.The hyperspectral detection mechanism is revealed nitrogen content of the apple crown at different detection ways.With the synchronous test of the nitrogen content in the laboratory,this research systematically analyzes the defferent levels of hyperspectral detection of nitrogen content in quantitative relationship in the apple tree leaves,pure crown and canopy ect.,and establishes the quantitative relation model between hyperspectral data and the nitrogen content,and uses independent test data

英文关键词： Hyperspectral remote sensing；Nitrogen content estimation；Leaf and canopy of apple tree；Estimation model；Hyperspectral characteristics