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中文摘要：
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。
英文摘要：
The accurate wheat management needs a reasonable nitrogen application,and it is one of the key measures for real-time and quantitatively monitoring of nitrogen status to gain the higher yield of wheat.In the present study,two field experiments were conducted with different nitrogen stress and wheat cultivars,the relationship was analyzed between spectral parameters and the partial factor productivity from applied N（PFPn）,and the estimating model was established for PFPn in the growth stages of wheat.The result indicated that there was a highly significant correlation between the PFPn and GreenNDVI at jointing,the correlation coefficient（r） was 0.640 4,the estimating model of PFPn was established,and the root mean square errors（RMSE） was 0.459 7.The result indicated that the PFPn can be effectively estimated by using spectral parameters.
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Comparison of two methods for estimation of leaf total chlorophyll content using remote sensing in w
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