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通过小麦氮素和品种对比试验,分析不同氮素和品种处理小麦生育期氮肥偏生产力与光谱参数的相关关系,建立小麦氮肥偏生产力的光谱参数估算模型,结果表明绿度植被指数(GREENNDVI)在拔节期与小麦氮肥偏生产力呈极显著相关,相关系数0.640 4。用GREENNDVI在拔节期建立小麦氮肥偏生产力的估算模型,均方根误差0.459 7。研究表明利用光谱参数可以有效地估算小麦氮肥偏生产力。
Through the comparison experiment of nitrogen and breed of wheat, the correlation between partial yield of nitrogen fertilizers and spectral parameters of different nitrogen and varieties during wheat growth period was analyzed, and the spectral parameter estimation model of partial yield of nitrogen fertilizer was established. The results showed that GREEN NDVI was The jointing stage was significantly and significantly correlated with the partial yield of nitrogen fertilizer in wheat, the correlation coefficient was 0.640 4. Using GREENNDVI to establish the estimating model of partial nitrogen fertilization in wheat at jointing stage, the root mean square error was 0.459 7. The results show that the spectral parameters can effectively estimate the partial nitrogen fertility of wheat.