Animal Husbandry and Feed Science ›› 2020, Vol. 41 ›› Issue (6): 17-25.doi: 10.12160/j.issn.1672-5190.2020.06.004

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Research Advances on the Effects of Energy Spillover and Reserve Carbohydrate Synthesis on Rumen Microbial Growth Efficiency

LI Sheng-li1, CUI Shuang-qing2, SUN Hai-zhou1, ZHANG Chun-hua1, Sangdan1, JIN Lu1, ZHANG Chong-zhi1, BING Xin-shuai2   

  1. 1. Institute of Animal Nutrition and Feed,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Inner Mongolia Key Laboratory of Herbivores Nutrition, Hohhot 010031,China;
    2. College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China
  • Received:2020-06-03 Online:2020-11-30 Published:2020-12-17

Abstract: Rumen microorganisms use some ATP to maintain metabolism, and the remaining ATP is used for reserve carbohydrate synthesis and energy overflow (ineffective circulation and heat generation). Therefore, rumen microorganisms have low protein synthesis efficiency. Carbohydrate stored by rumen protozoa accounts for the majority. Energy spillover was found in some pure bacterial culture experiments. Recent studies have found that energy spillover can also occur in mixed rumen flora. By accurately measuring the amount of carbohydrate storage and energy spillover, and assessing their influence on the growth efficiency of microorganisms, it is preferably possible to predict the yield of microbial protein and formulate measures to improve the efficiency of rumen microbial protein production. This article reviews the research advances on rumen microbial energy spillover and glycogen reserve rules, in hoping to provide a reference for better estimation of microbial protein synthesis and improving feed protein utilization efficiency.

Key words: rumen microorganisms, energy spillover, reserve carbohydrate

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