• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Livestock Science >Exploring feeding value of oak (Quercus incana) leaves: Nutrient intake and utilization in calves
【24h】

Exploring feeding value of oak (Quercus incana) leaves: Nutrient intake and utilization in calves

机译：探索橡树叶的营养价值：犊牛的养分吸收和利用

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

For evaluating the feeding value of oak leaves as a supplement to wheat straw an in vivo study was conducted involving fifteen male calves (aged 6-9 months, average body weight 84 kg,) distributed randomly into three equal groups. The calves in group 1 (G1) received a maintenance diet of concentrate (C) and wheat straw (WS) as the sole roughage; in group 2 (G2), C, WS and oak leaves (OL) at a ratio of 31:39:30 on dry matter (DM) basis and in group 3 (G3), C, WS and OL at a ratio of 33:45:22. The feeding lasted for 4 weeks and included a metabolism trial of 6 days duration. The DMI (kg/day) increased (41 and 38% in G2 and G3, respectively) with supplementation of oak leaves, being higher in G2 (2.90) followed by G3 (2.82) and G1 (2.05). Digestibility (%) of DM, organic matter and neutral detergent fiber was higher in G2 (51.5, 55.8, 49.0) compared to G1 (43.9, 49.3, 43.7) and G3 (45.4, 50.1, 44.0) contributing to higher ME intake (17%). Increased N utilization efficiency (20.6, 67.7 and 55.1% in G1, G2 and G3, respectively) and microbial protein production (180, 209, 194 g/day) coupled with a decrease in plasma urea level (about 25%) was observed in oak leaf supplemented groups. Supplementation of WS/OL ratio of 44:56 enhanced DMI, digestibility, efficiency of N utilization and body weight gain compared with a WS/OL ratio of 100/0.
机译：为了评估橡树叶作为小麦秸秆补充剂的取食价值，进行了一项体内研究，涉及十五只雄性犊牛（6-9个月大，平均体重84公斤），随机分为三个相等的组。第一组（G1）的小牛只接受粗饲料（C）和麦秸（WS）的日常饲喂;在第2组（G2）中，C，WS和橡树叶（OL）以干物质（DM）为基准以31:39:30的比例;在第3组（G3）中，C，WS和OL以33:33的比例：45：22。喂养持续了4周，包括持续6天的新陈代谢试验。随着橡树叶的添加，DMI（kg /天）增加（G2和G3中分别为41％和38％），G2（2.90）中依次是G3（2.82）和G1（2.05）中更高。 G2（51.5、55.8、49.0）中的DM，有机物和中性洗涤剂纤维的消化率（％）高于G1（43.9、49.3、43.7）和G3（45.4、50.1、44.0），这有助于提高ME摄入量（17） ％）。观察到氮利用效率增加（G1，G2和G3分别为20.6、67.7和55.1％）和微生物蛋白产量（180、209、194克/天）以及血浆尿素水平的降低（约25％）。橡树叶补充团体。与WS / OL比为100/0相比，补充WS / OL比为44:56增强了DMI，消化率，氮素利用效率和体重增加。

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