Effects of dietary rumen-protected lysine on milk yield and composition in lactating cows fed diets containing double-low rapeseed meal

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• 作者：Gang Liu ; Zhi Ma ; Anshan Shan ; Lin Wang and Zhongpeng Bi
• 刊名：International Journal of Dairy Technology
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：69
• 期：3
• 页码：380-385
• 全文大小：89K
• ISSN：1471-0307

文摘

This study investigated the effects of dietary rumen-protected lysine (RPLys) on milk yield and composition in lactating cows fed diets containing double-low rapeseed meal. Twenty-four cows were divided into three groups and fed one of three dietary treatments: 10% soya bean meal (SBM) diet (control), 15% double-low rapeseed meal (DLRSM) diet and 15% DLRSM + 32 g/d RPLys (DLRSML) diet. The results showed that no differences (P > 0.05) were observed in milk yield, 4% fat correction milk (FCM), energy correction milk (ECM), protein yield, milk fat yield, milk fat, lactose yield and lactose between control and DLRSM. Supplementation with DLRSML increased (P < 0.05) milk yield, 4% FCM, ECM, and protein yield compared with the SBM. The results indicated that DLRSM and DLRSML might be used to substitute for SBM as a protein source in lactating cows, and the latter might be more beneficial to improve the performance.