• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Livestock Science >Comparative study between sheep and goats on rumenic acid and vaccenic acid in milk fat under the same dietary treatments
【24h】

Comparative study between sheep and goats on rumenic acid and vaccenic acid in milk fat under the same dietary treatments

机译：相同饮食对绵羊和山羊乳脂中瘤胃酸和牛痘酸的比较研究

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

A number of studies have shown that the rumenic acid (RA= cis-9 trans-11 C: CLA) content of milk fat is usually higher in sheep than in goats, due partly to different dietary regimens. An experiment was conducted with 12 lactating dairy ewes and 12 goats with the objective to compare the two animal species (sheep/goats) fed diet with the same forage/concentrate (F/C) ratio, on their milk fatty acids (FA) profile with emphasis on RA and vaccenic acid (VA) production. The experiment was carried out in three consecutive phases, lasted 3 weeks each, immediately after weaning of lambs and kids. In phase I, the ewes and the goats were fed according to their maintenance and lactation requirements, with 14 kg alfalfa hay, 4 kg wheat straw and 12 kg concentrate the 12 ewes (F/C ratio=60/40), and with 14 kg alfalfa hay, 4 kg straw and 24 kg concentrate the 12 goats (F/C ratio=43/57). In phase II, 14 kg alfalfa hay, 4 kg straw and 14 kg concentrate were offered daily to each group of sheep and goats, with a F/C ratio=56/44. In phase III, all ewes and goats were fed individually with 0.8 kg alfalfa hay, 0.2 kg wheat straw and 0.8 kg concentrate daily with a F/C ratio=56/44. The results showed that the different F/C ratio between sheep and goats diets, in phase I, changed significantly the milk FA profile, with no significant difference in RA and VA milk fat content between sheep and goats in phase I. In phases II (group feeding) and III (individual feeding), where sheep and goats fed with the same amount of food of the same F/C ratio, the sheep milk fat had higher RA and VA content compared to goats. In conclusion, these findings support the hypothesis that there are species differences, as RA and VA production concerns, which needs further investigation.
机译：大量研究表明，绵羊中牛奶中反刍动物的瘤胃酸（RA = cis-9 trans-11 C：CLA）含量通常高于山羊，部分原因是饮食习惯不同。对12头泌乳的母羊和12头山羊进行了实验，目的是比较两种饲喂相同饲草/精料（F / C）比率的动物（绵羊/山羊）的牛奶脂肪酸（FA）谱着重于RA和疫苗的生产。羔羊和孩子断奶后立即分三个连续的阶段进行实验，每个阶段持续3周。在第一阶段，根据母羊和山羊的饲养和泌乳要求喂养它们，分别给14公斤苜蓿干草，4公斤麦秸和12公斤浓缩母羊12头母羊（F / C比率= 60/40）和14头母羊。公斤苜蓿干草，4公斤稻草和24公斤精炼了12只山羊（F / C比= 43/57）。在第二阶段，每天向每组绵羊和山羊提供14公斤苜蓿干草，4公斤稻草和14公斤精矿，F / C比率= 56/44。在第三阶段，所有母羊和山羊分别饲喂0.8公斤苜蓿干草，0.2公斤小麦秸秆和0.8公斤精矿，F / C比率= 56/44。结果表明，在第一阶段，绵羊和山羊饮食之间不同的F / C比值显着改变了牛奶FA的分布，在第一阶段，绵羊和山羊之间的RA和VA乳脂含量没有显着差异。小组喂养）和第三次（单独喂养），其中绵羊和山羊以相同的F / C比喂食相同量的食物，与山羊相比，绵羊乳脂的RA和VA含量更高。总之，这些发现支持以下假设：由于存在RA和VA生产问题，存在物种差异，需要进一步研究。

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