冬小麦冻害高光谱遥感监测机理研究

项目名称： 冬小麦冻害高光谱遥感监测机理研究

项目编号： No.31201168

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 食品科学、农学基础与作物学

项目作者： 冯美臣

作者单位： 山西农业大学

项目金额： 22万元

中文摘要： "针对近年来极端气候的变化，冬小麦冻害的发生频率越来越高，对产量也造成了较大影响的问题。因此本项目分析冻害对冬小麦冠层高光谱曲线特征的影响及其变异规律，探求不同温度与波谱特征的定量关系。利用高光谱遥感技术监测冻害发生前后植被指数的差异，分析冻害前后冬小麦各生理生态指标的变化情况，探索冬小麦生长恢复度与各项生理生态指标在冻害发生前后变化量之间的关系，进而通过分析生理生态指标和产量的关系，阐明生长恢复度与产量的关系，以实现冻害的定量遥感监测。同时，进行冬小麦冻害的高光谱时序监测，对不同生育时期的生理生态指标进行相应的分析，辨别其生长状况，以及冻害对冬小麦后期生长的影响，以便适时调整栽培措施，使粮食损失最小化。通过研究加深对冬小麦冻害高光谱遥感信息机理的了解，解决冬小麦冻害监测耗工耗时的问题，提高信息获取的时效性，加强对冬小麦冻害过程认识的能力，为冬小麦生产的防灾、减灾决策提供有力的技术支撑。

中文关键词： 冬小麦；低温胁迫；高光谱；机理；变化向量分析

英文摘要： The frequency of winter wheat freeze injury is becoming higher and higher, and freeze injury has a main effect on yield，based on the extreme climate change in recent years. So, the project is to analyze the impact of freeze injury on winter wheat canopy spectral curve characteristics and its variation pattern, and seek the quantitative relationship between the different temperature and spectral characteristics. The differences will be monitored using high spectrum resolving power technology before and after freeze injury, and the changes of the physiological and ecological index will be analyzed. The relationship will be explored between winter wheat growth recovery rate and the variable quantity of the physiological and ecological index before and after freeze injury. The relationship between growth recovery rate and yield will be elucidated though analyzing therelationship of physiological and ecological index and yield，and to realize the quantitative remote sensing monitoring of winter wheat freeze injury. The physiological and ecological index will be analyzed in different growth stages by monitoring the hige spectrum time series of winter wheat after freeze injury, to identify the growth status and effect on the winter wheat growth. It can timely adjust the cultural practices and minimize food losses. The h

英文关键词： winter wheat；low temperature stress；high spectral；mechanism；CAV