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中国农学通报 ›› 2021, Vol. 37 ›› Issue (35): 88-92.doi: 10.11924/j.issn.1000-6850.casb2021-0870

所属专题: 畜牧兽医

• 畜牧·动物医学·蚕·蜂 • 上一篇    下一篇

奶牛围产前期钙的稳态和负DCAD日粮的应用

李岩1(), 付瑶2, 陈勇3, 魏政1()   

  1. 1农业农村部人力资源开发中心/中国农学会,北京 100125
    2北京市畜牧总站,北京 100107
    3北京市顺义区农业农村局,北京 101399
  • 收稿日期:2021-09-06 修回日期:2021-11-08 出版日期:2021-12-15 发布日期:2022-01-07
  • 通讯作者: 魏政
  • 作者简介:李岩,女,1992年出生,吉林图们人,博士,研究方向:农业科技发展与动物营养科学。通信地址:100125 北京市朝阳区麦子店街22号楼农业农村部人力资源开发中心/中国农学会,Tel:010-59194480,E-mail: liyan@moahr.com

Calcium Homeostasis and Application of Negative DCAD Diet in Cows During Close-up Period

Li Yan1(), Fu Yao2, Chen Yong3, Wei Zheng1()   

  1. 1Human Resources Development Center of Ministry of Agriculture and Rural Affairs and China Association of Agricultural Science Societies, Beijing 100125
    2Beijing General Station of Animal Husbandry, Beijing 100107
    3Shunyi District Bureau of Agriculture and Rural Affairs of Beijing Municipality, Beijing 101339
  • Received:2021-09-06 Revised:2021-11-08 Online:2021-12-15 Published:2022-01-07
  • Contact: Wei Zheng

摘要:

围产期是奶牛泌乳周期乃至一生中最为关键的阶段,围产期的饲养管理对奶牛整个泌乳期的产奶性能、繁殖性能和健康状况都有影响。鉴于围产期奶牛的营养和生理研究的不断深入,尤其是奶牛围产前期钙的稳态得到越来越多的关注,负日粮阴阳离子差(dietary cation-anion difference, DCAD)日粮,即阴离子日粮作为一种有益的探索在国外牛场获得大规模推广应用,本文在综合阐述钙的稳态、吸收、释放规律和负DCAD日粮的特征的基础上,对负DCAD日粮的应用提出生产上的建议:在合理的干物质采食量(dry matter intake, DMI)基础上,目前普遍使用负DCAD日粮和高钙水平相结合,设定-100~ -150 meq/kg的DCAD水平,配合0.4%左右的高镁含量和低磷水平,对应尿液应该在pH 5.5~6.5。

关键词: 围产期, 奶牛, 钙, 负DCAD日粮, 低血钙症, 生产应用

Abstract:

Periparturition is the most critical period of lactation cycle and even the whole life of cows. The feeding management of periparturition has impacts on milking performance, reproductive performance and health status of cows in the whole lactation period. In view of the research about the nutrition and physiology of periparturition cows in recent years, especially that calcium homeostasis of cows during close-up period has been attached with more and more attention, negative DCAD (dietary cation-anion difference) diet or anionic diet has been widely promoted and applied in foreign farms as a beneficial exploration. Based on the comprehensive description of calcium homeostasis, absorption and release rules and the characteristics of negative DCAD diets, this article puts forward production recommendations for the application of negative DCAD diets. On the basis of reasonable DMI (dry matter intake), a combination of negative DCAD diets and high calcium levels is commonly used currently. Set the DCAD level of -100 to -150 meq/kg, combined with the high magnesium content of about 0.4% and low phosphorus level, the corresponding urine pH should be 5.5 to 6.5.

Key words: periparturition, cows, calcium, negative DCAD diet, hypocalcemia, production application

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