• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Dietary cation anion difference: Impact on productive and reproductive performance in animal agriculture
【24h】

Dietary cation anion difference: Impact on productive and reproductive performance in animal agriculture

机译：饮食阳离子阴离子的差异：对动物农业生产和生殖性能的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Various nutritional tools have been used to improve the productive and reproductive performance of animals, among which difference between certain minerals, called dietary cation anion difference (DCAD) plays a pivotal role. Low or negative DCAD diets reduce blood pH and HCO3-?and animal becomes acidotic. This improves Ca absorption from the intestinal tract. It also induces mobilization of Ca from bones which improves Ca status of the animal, thus preventing the occurrence of milk fever at the time of parturition. This may increase milk production and health in subsequent lactation. However, animals fed high DCAD diets before parturition may suffer from milk fever. Milk fever affected animals have increased plasma cortisol level that causes immunosuppression at calving. It is also positively associated with other problems like retained placenta, mastitis and udder edema. On the other hand, feeding high DCAD diet results in increased ruminal pH which is pre-requisite for optimal microbial activity as well as improving the feed intake of the animal. Improved dry matter intake (DMI) is positively correlated with milk yield by providing precursors for various milk constituents. High DCAD diet results in increased milk fat percent due to shifting of ruminal volatile fatty acid production towards acetic acid and butyric acid. It also improves energy balance of the animal which causes increased blood flow towards ovaries and increased progesterone synthesis and follicular development due to positive association between energy balance and postpartum ovulation, which leads to improved reproductive performance of the animal. While feeding low DCAD diet reduces feed intake which causes negative energy balance in early lactating animals that lessens conception rate and increases services per conception. In conclusion, feeding low DCAD diets prepartum prevents the occurrence of milk fever via improving Ca status while feeding high DCAD diets results in improved productive and reproductive performance in lactating animals.
机译：已经使用了各种营养工具来改善动物的生产和生殖性能，其中某些矿物质之间的差异（称为饮食阳离子阴离子差异（DCAD））起着关键作用。低DCAD饮食或负DCAD饮食会降低血液pH值和HCO3-，并且动物会变得酸中毒。这改善了钙从肠道的吸收。它还可以诱导骨骼中Ca的动员，从而改善动物的Ca状况，从而防止分娩时发生乳热。在随后的哺乳期，这可能会增加牛奶的产量和健康状况。但是，分娩前饲喂高DCAD饮食的动物可能会出现乳热。受牛奶热影响的动物血浆皮质醇水平升高，导致产犊时免疫抑制。它也与其他问题如胎盘滞留，乳腺炎和乳房水肿呈正相关。另一方面，饲喂高DCAD饮食会导致瘤胃pH值升高，这是最佳微生物活性以及改善动物采食量的先决条件。通过提供各种牛奶成分的前体，改善的干物质摄入量（DMI）与牛奶产量呈正相关。高DCAD饮食会导致瘤胃中挥发性脂肪酸的产生向乙酸和丁酸转移，从而增加乳脂百分比。由于能量平衡和产后排卵之间的正相关性，它还改善了动物的能量平衡，从而导致流向卵巢的血流量增加，孕酮合成和卵泡发育增加，从而改善了动物的生殖性能。饲喂低DCAD的饲料会减少饲料摄入量，这会在哺乳早期的动物中造成负能量平衡，从而降低受孕率并增加每次受孕的服务。总之，低产DCAD饮食产前喂养可通过改善Ca状态来预防乳热的发生，而高DCAD饮食则可提高哺乳动物的生产和生殖能力。

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