Prediction of winter wheat grain protein content based on multiangulal hyperspectral information

文献类型： 外文期刊

第一作者： Xiao, Chunhua

作者： Xiao, Chunhua;Li, Shaokun;Lu, Yanli;Wang, Keru;Gao, Shiju;Xie, Ruizhi

作者机构：

关键词： ear nitrogen content;grains protein content;improved spectrum model;observation angle

期刊名称：PROGRESS OF INFORMATION TECHNOLOGY IN AGRICULTURE

ISSN：

年卷期： 2007 年

页码：

收录情况： SCI

摘要： Multi-time spectrum of winter wheat canopy at different angle were measured by trial, the relation among nitrogen content of wheat ears, protein content of wheat grains and spectrum of wheat canopy were studied. As a result, the correlation between nitrogen content of wheat ears at waxy stage and protein content of wheat grains was significative, between nitrogen content of wheat ears at waxy stage and ratio vegetation index (RVI[670, 890]) of backwards level observation angle was significative. The improved model of protein content of wheat grains based on observation angle was GPC% = 25.815-14.035RVI(0 degrees) r(2) = 0. 8404, the r(2) of the improved model was 35.12% higher than of the tradition model, the RMSE and exact ratio of improved model were 0. 7358, 95.28, the RMSE was 0. 9896 lower than of traditional model, and the precision of improved model was 6.64% higher than of traditional model.

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