NIRS for Predicting Nutritive Value of Elymus Sibiricus
YAN Xu1,2,3, BAI Shi-qie1, 2*, YAN Jia-jun1, HU Chao4, LI Da-xu1, YOU Ming-hong1, ZHANG Yu1, DAO Zhi-xue4, ZHANG Chang-bing1, GAN You-min2
1. Sichuan Academy of Grassland Science, Chengdu 611731, China 2. Grassland Science Department of Sichuan Agricultural University, Ya’an 625014, China 3. Sericulfural Research Institute, Sichuan Academy of Agricultural Sciences, Nanchong 637000, China 4. College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China
Abstract：Siberian wildrye (Elymus sibiricus L.) is one of the predominant pasture species in Qinghai-Tibet plateau of China. It supplies a large number of fodders to domestic animals in spring and winter, and provides a large proportion of the summer and autumn grazing in these alpine regions. Crude protein (CP), acid detergent fiber (ADF)，neutral detergent fiber (NDF) and in vitro dry matter digestibility (IVDMD) are the most important aspects of nutritive value of forages. A successful application of near infrared spectroscopy (NIRS) in combination with partial least square regression (PLSR) for the determination of four parameters (CP, ADF, NDF and IVDMD) of Siberian wildrye was developed. The standard errors of calibration (SEC, %DM) and R2cal values (in parentheses) were 0.329 9(0.994 5), 0.779 9(0.949 9), 1.343 0(0.913 3), and 1.376 2(0.982 2) for CP, ADF, NDF and IVDMD equations, respectively. The standard errors of prediction (SEP, %DM) and R2val values (in parentheses) were 0.362 1(0.993 8), 0.787 8(0.944 9), 1.385 2(0.890 7), and 1.430 3(0.979 0) for CP, ADF, NDF and IVDMD, respectively. A good correlation (r>0.943 8) was found between results from NIRS and the traditional chemical method, and residual predictive deviation (RPD) ranged from 3.02 to 12.63. It was concluded that NIR spectroscopic technique associated with chemometrics is sufficiently sensitive to allow the accurate prediction of the concentrations of components (CP, ADF and NDF) and IVDMD of Siberian wildrye.
严 旭1, 2，3，白史且1, 2*，鄢家俊1，胡 超4，李达旭1，游明鸿1，张 玉1，刀志学4，张昌兵1，干友民2 . 近红外光谱法测定老芒麦营养价值 [J]. 光谱学与光谱分析, 2015, 35(08): 2103-2107.
YAN Xu1,2,3, BAI Shi-qie1, 2*, YAN Jia-jun1, HU Chao4, LI Da-xu1, YOU Ming-hong1, ZHANG Yu1, DAO Zhi-xue4, ZHANG Chang-bing1, GAN You-min2 . NIRS for Predicting Nutritive Value of Elymus Sibiricus . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(08): 2103-2107.
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