• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tropical Animal Health and Production >Practice on improving fattening local cattle production in Vietnam by increasing crude protein level in concentrate and concentrate level
【24h】

Practice on improving fattening local cattle production in Vietnam by increasing crude protein level in concentrate and concentrate level

机译：通过提高精矿和精矿中粗蛋白水平来改善越南本地牛育肥的实践

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two experiments were conducted to determine the effects of crude protein (CP) level in concentrate (experiment 1) and concentrate level (experiment 2) on feed intake, nutrient digestibility, nitrogen (N) retention, ruminal pH and NH3-N concentration and average daily gain (ADG) of Vietnamese local fattening cattle. Animals (24 cattle, initial live weight (LW) 150.3 +/- 11.8 kg in experiment 1 and 145.1 +/- 9.8 kg in experiment 2) were allotted based on LW to one of four treatments in a randomised complete block design. In experiment 1, concentrate with four levels of CP (10, 13, 16 and 19 %) was fed at 1.5 % of LW. In experiment 2, concentrate was fed at 1.0, 1.4, 1.8 and 2.2 % of LW. In both experiments, roughage was 5 kg/day native grass and ad libitum rice straw (fresh basis). Results showed that the CP level in concentrate significantly affected dry matter (DM) intake (P < 0.05), N retention, ADG and ruminal NH3-N concentration (P < 0.01), but it had no significant effect on DM, organic matter (OM) and neutral detergent fibre (NDF) digestibility (P > 0.05), whereas CP digestibility increased (P < 0.001) along with the CP level. DM intake, N retention and ADG increased (P < 0.001) linearly with concentrate intake. DM and CP digestibility were not significantly affected by concentrate intake (P > 0.05). OM digestibility and NH3-N concentration increased linearly (P < 0.05), whereas NDF digestibility and ruminal pH declined linearly with increased concentrate consumption (P < 0.01). These results indicate that 16 % CP in concentrate and feeding concentrate at the rate of 2.2 % of LW are recommendable for fattening local cattle in Vietnam.
机译：进行了两个实验，以确定浓缩物（实验1）和浓缩物水平（实验2）中粗蛋白（CP）水平对饲料摄入，养分消化率，氮（N）保留，瘤胃pH和NH3-N浓度及平均值的影响。越南当地育肥牛的日增重（ADG）。将动物（24头牛，实验1的初始活重（LW）150.3 +/- 11.8 kg，实验2的145.1 +/- 9.8 kg）基于LW分配给随机完全区组设计中的四种处理方法之一。在实验1中，以1.5％的LW进料具有四个CP水平（10％，13％，16％和19％）的精矿。在实验2中，以LW的1.0％，1.4％，1.8％和2.2％进料精矿。在这两个实验中，粗饲料为每天5千克的天然草和任意量的稻草（新鲜）。结果表明，浓缩物中的CP水平显着影响干物质（DM）摄入（P <0.05），氮保留，ADG和瘤胃NH3-N浓度（P <0.01），但对DM，有机物（ OM）和中性洗涤剂纤维（NDF）的消化率（P> 0.05），而CP消化率与CP含量一起增加（P <0.001）。 DM摄入量，N保留量和ADG随浓缩物摄入量线性增加（P <0.001）。 DM和CP的消化率不受浓缩物摄入量的显着影响（P> 0.05）。 OM消化率和NH3-N浓度呈线性增加（P <0.05），而NDF消化率和瘤胃pH随着精矿消耗量的增加呈线性下降（P <0.01）。这些结果表明，建议在越南精饲料和精饲料中添加16％的CP（以LW的2.2％的比率）来肥育当地的牛。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号