Animal Husbandry and Feed Science ›› 2022, Vol. 43 ›› Issue (5): 55-60.doi: 10.12160/j.issn.1672-5190.2022.05.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Predisposing Factors for Subacute Ruminal Acidosis (SARA) and Its Affects on Ruminal Function in Dairy Cows

YANG Kun1,HU Hong-lian2,LI Da-biao1,LI Lan-zhu3,ZHANG Jian-xia1,QIAN Na1,YU Liang-yi1,BAI Meng-ting1,GUO Lin1,GAO Min2   

  1. 1. College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China
    2. Institute of Animal Nutrition and Feed,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China
    3. Northeast Agricultural University,Harbin 150030,China
  • Received:2022-04-23 Online:2022-09-30 Published:2022-09-21

Abstract:

Subacute ruminal acidosis (SARA) is a nutritional metabolic disease with a high frequency in dairy farming. With the development of intensive dairy farming in China, feeding a large amount of high-energy grain feed to improve the production performance of dairy cows is prone to develop SARA, which lowers the ruminal fluid pH value, alters the ruminal bacterial flora, impairs the ruminal epithelial mucosa, and eventually affects the ruminal metabolic function. This paper analyzed the predisposing factors of SARA including various physiological stages, feed intake behaviors and individual differences of dairy cows, discussed the affects of SARA on the changes of ruminal bacterial flora, gene expression of ruminal epithelial cells and ruminal barrier function of dairy cows, in hoping to provide references for elucidating the mechanisms of ruminal function damage caused by SARA and reducing the risk of SARA in dairy cows.

Key words: dairy cows, subacute ruminal acidosis, predisposing factors, ruminal function

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