中文摘要：

分别用Weende、VanSoest与CNCPS体系分析稻草、苜蓿、玉米秸秆、豆腐渣与啤酒糟的营养成分，并计算这5种饲料的相对值（RFV）与分级指数（GI）以及碳水化合物与蛋白质组分，旨在为各体系在江西奶牛业的合理应用提供基础理论数据。同时指出，Weende与VanSoest体系是奶牛饲料营养价值评定的基础，应根据需要选择综合评定指数还是CNCPS体系。

英文摘要：

To get the basic data for methods of Weende, Van Soest and CNCPS being used in Jiangxi cow industry reasonably,rice straw （RS）, Medicago Sativa L. （MSL）, corn stover （CS）, soybean curb residues （SBCR） and brewer＇ s grains （BG） were collected from several dairy farms in Jiangxi Province, and nutrient components were analysed with these methods respectively. Furthermore PA, PB1, PC and PB3 in CP and CC, CB2, CB1 and CA in carbohydrate of the diary feeds as well as their relative feed value （RFV） and grading index （GI） were also calculated respectively. It is suggested that whether to use RFV or GI or CNCPS depends on the aim.