A NIR technique for rapid determination of soil mineral nitrogen.
A NIR technique for rapid determination of soil mineral nitrogen.
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DOI：
10.1023/a:1009916108990
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发表时间：
1999-01-01
影响因子：
6.2
通讯作者：
Pelletier, M.
中科院分区：
文献类型：
--
作者：
Ehsani, M. R.;Upadhyaya, S. K.;Pelletier, M.
研究了利用近红外光谱快速检测土壤矿质氮含量的可能性。进行了模拟研究，以确定偏最小二乘法（PLS）和主成分回归（PCR）技术的能力，相关的近红外光谱数据的干扰效应和实验噪声的存在下，土壤硝酸盐含量。模拟研究表明，无论是PLS和PCR技术是相当强大的预测土壤硝酸盐含量的校准集包括相同的干扰效果。如果预测集包含校准集不包含的干扰效应，则这些技术完全失败。这意味着，一个网站特定的校准是必要的，这种技术的成功工作。实验室测试使用Yolo壤土和卡佩粘土土壤样品，以及验证测试使用田间土壤（Yolo壤土和卡佩粘土）与氮肥混合表明，土壤矿质氮含量可以使用近红外技术提供特定地点的校准使用。
The possibility of rapidly sensing soil mineral-N content using near infrared (NIR) reflectance was investigated. Simulation studies were conducted to determine the ability of Partial Least Squares (PLS) and Principal Components Regression (PCR) techniques to relate NIR spectral data to soil nitrate content in the presence of interfering effects and experimental noise. The simulation studies revealed that both PLS and PCR techniques were quite robust in predicting soil nitrate content provided the calibration set included the same interfering effects. These techniques failed completely if the prediction set contained interfering effects which were not included in the calibration set. This implies that a site-specific calibration is necessary for this technique to work successfully. Laboratory tests using Yolo loam and Capay clay soil samples as well as verification tests using field soils (Yolo loam and Capay clay) mixed with nitrogen fertilizer indicated that soil mineral-N content can be determined using the NIR technique provided site-specific calibration is used.