数字农科院2.0

Winter Wheat Lai Inversion Considering Morphological Characteristics At Different Growth Stages Coupled With Microwave Scattering Model And Canopy Simulation Model

文献类型： 外文期刊

作者： Wu, SR; Yang, P; Ren, JQ; Chen, ZX; Liu, CG; Li, H

作者机构：

关键词： LAI inversion; Winter wheat; Canopy simulation model; Microwave scattering model for winter wheat at different growth stages; Morphological characteristics

期刊名称： REMOTE SENSING OF ENVIRONMENT

ISSN： 0034-4257

年卷期： 2020 年 240 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： To better eliminate the adverse effects of the ground surface on winter wheat Leaf area index (LAI) inversions and to further improve the accuracy of regional winter wheat LAI inversion using SAR remote sensing data, considering the morphological characteristics at different wheat growth stages, a winter wheat LAI inversion model coupled with the microwave scattering model (MSM) for winter wheat at different growth stages (MSMDGS) and the canopy scattering simulation model (CSSM) was proposed. In this research, taking Hengshui City of Huanghuaihai Plain of North China as the study region, using RADARSAT-2 data as image sources and based on parameter sensitivity analysis and model calibration, the proposed model was applied and validated. The LAI inversion results of winter wheat showed that the proposed model had good performance in the regional application and that LAI inversion results with high accuracy could be obtained. Among the three key growth stages (jointing stage, booting stage and heading stage) of winter wheat, the R-2, adjusted R-2 and RMSE between the LAI inversion value and the ground-measured data were 0.918, 0.917 and 0.675, respectively, which indicated that the winter wheat LAI inversion model coupled with MSMDGS and CSSM had certain feasibility and applicability.

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