SHORT COMMUNICATION

Effects of Dietary Different Non-Fibrous Carbohydrate/Neutral Detergent Fiber on Growth Performance, Rumen Fermentation and Microbial Diversity of Plateau-Type Fattening Tibetan Sheep

  • LI Jiangwei ,
  • GUI Linsheng ,
  • ZHOU Li ,
  • HOU Shengzhen ,
  • WANG Zhiyou ,
  • YANG Baochun ,
  • MA Boyan
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  • College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China

Received date: 2021-05-06

  Online published: 2021-12-16

Abstract

The aim of this study was to investigate the effects of dietary different non-fibrous carbohydrate/neutral detergent fiber (NFC/NDF) on growth performance, rumen fermentation and microbial diversity of plateau-type fattening Tibetan sheep. A total of 210 healthy 3-month-old Tibetan female lambs with similar body weight[(22.14±0.02) kg] were randomly divided into 7 groups with 30 lambs per group. Lambs in 7 groups were fed experimental diets with NFC/NDF of 2.86 (group Ⅰ), 2.69 (group Ⅱ), 2.42 (group Ⅲ), 2.06 (group Ⅳ), 1.88 (group Ⅴ), 1.63 (group Ⅵ) and 1.43 (group Ⅶ), respectively. The pre-experimental period lasted for 10 days, and the experimental period lasted for 90 days. At the end of the experiment, the final body weight, average daily gain and average daily feed intake of each group were determined. Additionally, three individuals from each group were slaughtered and collected the rumen fluid, the volatile fatty acid content and microbial colony composition were detected. The results showed as follows:1) the final body weight of groups Ⅰ, Ⅱ, Ⅲ and Ⅳ was significantly higher than that of groups Ⅴ, Ⅵ and Ⅶ (P<0.05), and the average daily gain of groups Ⅰ and Ⅱ was significantly higher than that of groups Ⅳ, Ⅴ, Ⅵ and Ⅶ (P<0.05). 2) The rumen ammoniacal nitrogen content of groups Ⅰ and Ⅱ was significantly higher than that of groups Ⅴ, Ⅵ and Ⅶ (P<0.05), the rumen acetate content of group Ⅰ was significantly lower than that of groups Ⅴ, Ⅵ and Ⅶ (P<0.05), the rumen propionate content of groups Ⅰ and Ⅱ was significantly higher than that of group Ⅶ (P<0.05), the rumen butyrate of group Ⅲ was significantly higher than that of group Ⅶ (P<0.05), and the rumen total volatile fatty acids (TVFA) of group Ⅱ was significantly higher than that of other groups (P<0.05). 3) For the fungi, the relative abundances of Nectriaceae, Peniophoraceae and Lasiosphaeriaceae in rumen of groups Ⅳ, Ⅴ, Ⅵ and Ⅶ were significantly lower than that of group Ⅱ (P<0.05), the relative abundances of Aspergillaceae and Myxotrichaceae in rumen of group Ⅴ were significantly higher than that of groups Ⅱ and Ⅲ (P<0.05), and the rumen Sebacinaceae relative abundance of group Ⅲ was significantly higher than that of other groups (P<0.05). 4) For the bacteria, the rumen Quinella relative abundance of groups Ⅴ and Ⅶ was significantly higher than that of groups Ⅰ and Ⅱ (P<0.05), the rumen Christensenellaceae_R-7_group relative abundance of group Ⅵ was significantly higher than that of other groups (P<0.05), the rumen Ruminococcaceae_NK4A214_group relative abundance of groups Ⅴ, Ⅵ and Ⅶ was significantly higher than that of other groups (P<0.05), the rumen Prevotella_1 relative abundance of group Ⅲ was significantly higher than that of other groups (P<0.05), the rumen Lachnospiraceae_NK3A20_group relative abundance of group Ⅶ was significantly higher than that of other groups (P<0.05), and the rumen Sphingomonas relative abundance of groups Ⅴ, Ⅵ and Ⅶ was significantly lower than that of groups Ⅰ and Ⅱ (P<0.05). In conclusion, dietary NFC/NDF has a certain effect on growth and development, rumen volatile fatty acid content and microbial diversity of plateau-type fattening Tibetan sheep. When dietary NFC/NDF is 2.69, it can not only promote growth and development of plateau-type fattening Tibetan sheep, but also promote rumen fermentation and improve microbial diversity.

Cite this article

LI Jiangwei , GUI Linsheng , ZHOU Li , HOU Shengzhen , WANG Zhiyou , YANG Baochun , MA Boyan . Effects of Dietary Different Non-Fibrous Carbohydrate/Neutral Detergent Fiber on Growth Performance, Rumen Fermentation and Microbial Diversity of Plateau-Type Fattening Tibetan Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(12) : 7180 -7191 . DOI: 10.3969/j.issn.1006-267x.2021.12.057

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