Research on Predicting the Nutrition Value of Pelletized Alfalfa by Near Infrared Reflectance Spectroscopy
HUA Rong1, HAN Jian-guo1*, QI Xiao1, NIE Zhi-dong1, LI Bo2
1. Institute of Grassland Science, China Agricultural University,Beijing Major Laboratory, Beijing 100094, China 2. State Key Laboratories for Agrobiotechnology, Beijing 100094, China
Abstract:The present research aimed to predict the qualities of pelletized alfalfa by near infrared reflectance spectroscopy. Sixty pelletized alfalfa samples were collected, including 22 whole plant alfalfa samples, 19 stem samples and 19 leaf samples. They were divided into a calibration sample set (45 samples) and a validation sample set (15 samples). The Fourier transform-near infrared reflectance spectroscopy (FT-NIRS) and the partial least square (PLS) were used to calibrate models of the pelletized alfalfa nutrition value, involving crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents. All models had great calibration performances. The correlation coefficients of cross-validation (RCV) were between 0.964 10 and 0.968 87, and the root mean square errors of cross-validation (RMSECV) were between 0.80% and 2.59%. Fifteen validation samples were used to predict the performances of these models, all the correlation coefficients of NIRS value and chemical value (r) were between 0.966 9 and 0.974 3, and the root mean square errors of prediction (RMSEP) were between 0.85% and 2.07%. The RPD values of cross-validation and prediction were all above 3. The results showed that pelletized alfalfa’s CP, NDF, ADF contents were exactly predicted by near infrared reflectance spectroscopy.
Key words:Pelletized alfalfa;Near infrared reflectance spectroscopy;Nutrition value
滑荣1,韩建国1*,齐晓1,聂志东1,李博2. 近红外漫反射光谱法预测紫花苜蓿草颗粒营养价值[J]. 光谱学与光谱分析, 2008, 28(12): 2826-2829.
HUA Rong1, HAN Jian-guo1*, QI Xiao1, NIE Zhi-dong1, LI Bo2. Research on Predicting the Nutrition Value of Pelletized Alfalfa by Near Infrared Reflectance Spectroscopy. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(12): 2826-2829.
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