文献类型： 外文期刊

作者： Yan Xu ² ; Bai Shi-qie ¹ ; Yan Jia-jun ¹ ; Hu Chao ⁴ ; Li Da-xu ¹ ; You Ming-hong ¹ ; Zhang Yu ¹ ; Dao Zhi-xue ⁴ ; Zhang Cha ¹ ;

作者机构： 1.Sichuan Acad Grassland Sci, Chengdu 611731, Peoples R China

2.Sichuan Agr Univ, Grassland Sci Dept, Yaan 625014, Peoples R China

3.Sichuan Acad Agr Sci, Sericulfural Res Inst, Nanchong 637000, Peoples R China

4.Southwest Univ Nationalities, Coll Life Sci & Technol, Chengdu 610041, Peoples R China

关键词： NIRS;Elymus sibiricus;CP;NDF;IVDMD

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： 2015 年 35 卷 8 期

页码：

收录情况： SCI

摘要： Siberian wildrye (Elymus sibiricus L.) is one of the predominant pasture species in Qinghai-Tibet plateau of China. It supplies a large number of kidders 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 R-cal(2) 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 R-val(2) 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.