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Effects of Acremonium terricola Culture on Ruminal Degradation Parameters of Roughages and Microflora of Dairy Cows

  • LI Yang ,
  • ZHANG Xingyi ,
  • ZHANG Guangning ,
  • WANG Yizhen ,
  • LIN Cong ,
  • XU Hongjian ,
  • JIANG Xin ,
  • LIU Shuai ,
  • ZHANG Yonggen
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  • College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China

Received date: 2016-03-28

  Online published: 2016-10-17

Abstract

This experiment was conducted to study the effects of Acremonium terricola culture (ATC) on ruminal degradation parameters of roughages and microflora of dairy cows. Three ruminally cannulated multiparous Holstein cows averaging 650 kg of body weight were used in a 3×3 Latin square design. Dairy cows in different groups were fed basal diets supplemented with 0 (control group), 15 (low-dose group) and 30 g/(d·cow) ATC (high-dose group), respectively; The experiment consisted of 3 periods with 27 days per period, and each period consisted of a 15-day pre-test period and 12-day test period. The changes of ruminal degradation parameters of Chinese wildrye, corn silage and alfalfa hay, and ruminal microflora were determined. The results showed as follows:1) compared with control group, effective degradability and degradation rate of fraction of slowly degraded of dry matter of corn silage in high-dose group were significantly increased (P<0.05); effective degradability of neutral detergent fiber of three kinds of roughages in high-dose group was significantly higher than that of the other groups (P<0.05), and degradation rate of fraction of slowly degraded of neutral detergent fiber of Chinese wildrye and degradable fraction content of neutral detergent fiber of alfalfa hay in high-dose group were significantly higher than those of the other groups (P<0.05); compared with control group, effective degradability and the content of fraction of immediately degraded of crude protein of corn silage in high-dose group were significantly increased (P<0.05), effective degradability of crude protein of alfalfa hay in test groups was significantly increased (P<0.05); the contents of fraction of immediately degraded and degradable fraction of Chinese wildrye in high-dose group were significantly increased (P<0.05), but effective degradability was not affected (P>0.05). 2) Compared with control group, ruminal protozoal population and the relative contents of Ruminococcus flavefaciens, Ruminococcus albus and Prevotella in high-dose group were significantly increased (P<0.05), and the relative content of Selenomonas ruminantium in test groups was significantly increased (P<0.05), however, the relative content of Fibrobacter succinogenes in high-dose group was significantly decreased (P<0.05). Therefore, under the conditions in the present study, ATC may adjust contents of certain rumen microbes and improve degradability of roughages of dairy cows, and the suitable recruitment is 30 g/(d·cow).

Cite this article

LI Yang , ZHANG Xingyi , ZHANG Guangning , WANG Yizhen , LIN Cong , XU Hongjian , JIANG Xin , LIU Shuai , ZHANG Yonggen . Effects of Acremonium terricola Culture on Ruminal Degradation Parameters of Roughages and Microflora of Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2016 , 28(10) : 3238 -3247 . DOI: 10.3969/j.issn.1006-267x.2016.10.027

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