澳门威斯人游戏网址

当前位置:澳门线上真人赌博网址 >>学术论文 > 2020年 >> 正 文

Effects of feeding level of alfalfa hay on nitrogen utilization for 1?kg daily gain of crossbred Simmental male calves

发布时间:2020-03-17 字体大小 T |T

Title: Effects of feeding level of alfalfa hay on nitrogen utilization for 1?kg daily gain of crossbred Simmental male calves

Authors: Nobuyuki Kobayashi, Fujiang Hou, Atsushi Tsunekawa, Xianjiang Chen, Tianhai Yan, Toshiyoshi Ichinohe

Journal: Grassland Science

Impact Factor: IF2018=0.806 (农林科学4)

Abstract:In Gansu Province, a key beef cattle production area in China, feeding systems are changing from grazing to stall?feeding. To reduce production costs, alternative feeding regimens with domestic forages, such as alfalfa hay (AH), are needed. We evaluated the effects of the AH feeding level on nitrogen balance and daily gain (DG) of Simmental calves by two feeding trials. In trial 1, when AH was consumed at 0%19% of total dry matter intake, no clear effect of AH intake on metabolizableprotein supply and DG was observed. In trial 2, when more concentrate feed was fed than in trial 1, metabolizable-protein supply and nitrogen retention increased as the AH consumption rate increased (0%?38% of total intake); these effects appeared to be related to the DG increase. Our results suggest that AH inclusion in concentrate?based diets increases the metabolizableprotein supply for the optimal DG of growing beef calves.

链接: https://onlinelibrary.wiley.com/doi/10.1111/grs.12273

全文:Effects of feeding level of alfalfa hay on nitrogen utilization for 1 kg daily gain of crossbred Simmental male calves.pdf

Baidu