Measurement of Soil Organic Matter with Near Infrared Spectroscopy Combined with Genetic Algorithm and Successive Projection Algorithm
ZHANG Hai-liang1,2, LUO Wei2, LIU Xue-mei2, HE Yong1*
1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China 2. School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China
Abstract：Visible near infrared spectroscopy combined with genetic algorithm and successive projection algorithm was investigated to detect soil organic matter (OM). A total of 394 soil samples were collected from Wencheng, Zhejiang province. In order to simplify calibration model, a total of 18 characteristic wavelengths were selected with usinggenetic algorithm and successive projections algorithm. These characteristic wavelengths were subjected to partial least squares regression (PLSR) with leave-one-out cross validation to establish calibration model of soil organic matter (OM) with coefficient of determination (R2) of 0.81, 0.83, RMSEP of 0.22, 0.20 and residual prediction deviation (RPD) of 2.31, 2.45 for the calibration set and prediction set respectively. The results showed that using genetic algorithm and successive projections algorithm can simplify the model greatly while the assessing indexes of model such as R2, RMSEP and RPD were not reduced greatly compared with indexes of model using full spectra data to develop calibration model. Therefore, genetic algorithm combined with successive projections algorithm can be used to simply the model to predict soil organic matter.
Key words：Visible near infrared spectroscopy;Soil organic matter;Genetic algorithm;Successive projection algorithm
章海亮1, 2，罗 微2，刘雪梅2，何 勇1* . 应用遗传算法结合连续投影算法近红外光谱检测土壤有机质研究 [J]. 光谱学与光谱分析, 2017, 37(02): 584-587.
ZHANG Hai-liang1,2, LUO Wei2, LIU Xue-mei2, HE Yong1* . Measurement of Soil Organic Matter with Near Infrared Spectroscopy Combined with Genetic Algorithm and Successive Projection Algorithm . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(02): 584-587.
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