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Real-time analysis of soil N and P with near infrared diffuse reflectance spectroscopy

文献类型： 外文期刊

作者： Chen Peng-fei 1 ; Liu Liang-yun 1 ; Wang Ji-hua 1 ; Shen Tao 1 ; Lu An-xiang 1 ; Zhao Chun-jiang 1 ;

作者机构： 1.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China

关键词： near infrared diffuse reflectance spectroscopy; soil; total N; total P

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）

ISSN： 1000-0593

年卷期： 2008 年 28 卷 2 期

页码：

收录情况： SCI

摘要： Improving the efficiency of fertilization is an effective method of enhancing income for farmers, but it depends on measuring the soil nutrients accurately and rapidly. Near infrared reflectance spectroscopy (NIBS) is a fast method to detect the soil nutrients. In order to evaluate the feasibility of using LAIRS to determine the soil N and P contents, the soil samples were collected from different LULC (land use and land cover) types in Daxing district, Beijing, and their biochemical parameters were determined by traditional chemical method. Then, the near infrared reflectance spectra of the samples were acquired, and LAIRS models were built using partial least square regression (PLS) and Fourier transform technology for the total N and total P. The determination coefficients of cross validation for the total N and total P were 0.862 6 and 0.668 5 respectively. Ten samples were used to test the performance of the models. The coefficients of correlation between the chemically determined value and the NIBS predicted one were 0.969 8(N) and 0.830 7(P) respectively. The root mean standard error of prediction for N and P were 0.009 5(%) and 0.008 6( %), respectively. The ratios of RMSEP to SD(RPD) were 3.78(N) and 1.69(P). The results showed that the LAIRS could be used to evaluate the soil N accurately and the soil P roughly.

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