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  • 软件名称:基于植被指数融合的冬小麦生物量反演研究
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 孙奇,关琳琳,焦全军,刘新杰,戴华阳
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 作物群体生物量是形成产量的物质基础,遥感技术是高效、客观监测作物地上生物量的重要手段,对农业生产管理具有重要意义。以安徽省龙亢农场为研究区,通过PROSAIL模拟光谱分析了4个LAI相关的可见光-近红外植被指数、2个叶片干物质相关的短波红外植被指数和8个融合植被指数与冬小麦地上生物量的关系,并建立反演模型。模拟结果显示,干物质植被指数与作物生物量的相关性高于LAI相关的植被指数,两者融合的植被指数增强了常用植被指数冬小麦生物量的探测能力。利用实测冬小麦数据对生物量反演模型进行验证,结果显示:融合植被指数普遍提高了单一植被指数的地上生物量反演精度,其中MTVI2×NDMI精度最高(RMSE=606.8 kg/hm2),并为作物地上生物量的高精度反演提供新的技术途径。 关键词: 生物量反演;  冬小麦;  PROSAIL模型;  植被指数融合     Abstract: Crop biomass is a vital fundamental substance for predicting yield. Remote sensing is an important technology to monitor crop above-ground biomass efficiently and objectively, which is of great significance for agricultural production and management. Taking Longkang farm in Anhui province as the research area, this paper analyzes the relationship between aboveground biomass of winter wheat and 4 LAI-VIs, 2 DMIs and 8 combined vegetation indices by PROSAIL simulation spectrum, and builds retrieval models. The results show that the correlation between DMIs and crop biomass is higher than LAI-VIs, and the combined vegetation index enhances the crop biomass detection ability of commonly used vegetation indices. The biomass retrieval models are validated with the measured biomass of winter wheat, and the results show that the combined vegetation index generally improves the above-ground biomass retrieval accuracy of single vegetation index, among which MTVI2×NDMI has the highest accuracy (RMSE=606.8 kg/hm2).This paper provides a new technique for high precision retrieval of crop above-ground biomass.

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