农业现代化研究2012，Vol.33Issue(4)：481-484,4.
利用高光谱数据估测不同温度胁迫下的水稻籽粒中粗蛋白和直链淀粉含量
Estimating Contents of Crude Protein and Amylose Content in Rice Grain by Hyper-spectral under Different High Temperature Stress
摘要
Abstract
Grain crude protein and amylose content are two important indexes for evaluating rice quality. The relationships between grain crude protein and amylose content in rice and canopy spectral reflectance at different growth stages were analyzed on the basis of the data from the field experiments under different temperature. The results showed that there were significantly increased grain crude protein content and reduced amylose content under high-temperature, and that there was also significantly or very significantly correlation of grain crude protein and amylose content with canopy spectra and its first derivative at different growth stages in some wavebands. The correlation of grain crude protein and amylose content with the ratio, differential and normalized difference vegetation indices as well as red edge parameters were further analyzed. Those fitting spectral parameters with better correlation were subsequently selected by regression analysis, and the model was established for predicting grain crude protein content (GCPC) and grain amylose content (GAQ in rice. The established model was tested with observed data from other independent experiments with estimation precision of 0.393-0.683, estimation accuracy of 0.708-0.923, and RMSE of 8.706%-l 1.296%, which indicated a good fit between predicted values in this model and observed values. It was concluded that the established spectral index model can be used for predicting grain crude protein and amylose content in rice with different temperature levels.关键词
水稻籽粒/粗蛋白质含量/直链淀粉含量/反射光谱/光谱参数Key words
rice grain/ crude protein content/ amylose content/ canopy reflectance spectra/ spectral parameter分类
农业科技引用本文复制引用
谢晓金,李秉柏,朱红霞..利用高光谱数据估测不同温度胁迫下的水稻籽粒中粗蛋白和直链淀粉含量[J].农业现代化研究,2012,33(4):481-484,4.基金项目
国家公益性行业科研专项项目(编号:GYHY201106027) （编号:GYHY201106027）
江苏省农业气象重点实验室开放基金(编号:JKLAM201204). （编号:JKLAM201204）
