Effects of Diets with Different Proportions of Whole Mulberry on Growth Performance, Nutrient Apparent Digestibility, Serum Antioxidant Indexes and Rumen Fermentation Parameters of Fattening Hu Sheep

  • KOU Yufei ,
  • ZHU Wenbin ,
  • LI Fei ,
  • LI Fadi ,
  • WENG Xiuxiu ,
  • TANG Defu ,
  • HAO Shengyan ,
  • YUAN Lyufeng
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  • 1. State Key Laboratory of Grassland Agro-Ecosystem, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
    2. Engineering Laboratory of Mutton Sheep Breeding and Reproduction Biotechnology in Gansu Province, Minqin 733300, China;
    3. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    4. Institute of Animal Husbandry, Pasture and Green Agriculture, Gansu Academy of Agricultural Science, Lanzhou 730070, China

Received date: 2020-10-30

  Online published: 2021-05-14

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Abstract

The purpose of this experiment was to study the effects of diets with different proportions of whole mulberry on growth performance, nutrient apparent digestibility, serum antioxidant indexes and rumen fermentation parameters of fattening Hu sheep. Fifty-four 3-month-old healthy male Hu sheep with the initial body weight of (25.02±1.81) kg were randomly divided into 3 groups with 18 repetitions each group and 1 Hu sheep each repetition. Hu sheep in the 3 groups were diets with the adding proportions of 0 (CON group), 4% (MUL4 group) and 8% whole mulberry (MUL8 group), respectively. The whole experimental period included the pre-feeding period of 7 days and the formal period of 63 days. The results showed as follows:1) There were no significant differences in the final body weight, dry matter intake (DMI), feed/gain (F/G) of fattening Hu sheep among groups (P>0.05). With the dietary whole mulberry proportion increasing, the average daily gain (ADG) of fattening Hu sheep was increased linearly (P<0.05), and the ADG in MUL8 group was significantly higher than that in CON group (P<0.05). 2) Dietary whole mulberry proportion had no significant differences in the apparent digestibility of dry matter (DM), organic matter (OM), ether extract (EE), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of fattening Hu sheep (P>0.05). 3) With dietary whole mulberry proportion increasing, the serum glutathion peroxidase (GSH-Px) activity and total antioxidant capacity (T-AOC) of fattening Hu sheep were increased linearly (P<0.05), the serum T-AOC in MUL8 group was significantly higher than that in CON group (P<0.05), and the serum GSH-Px activity in MUL4 group and MUL8 group was significantly higher than that in CON group (P<0.05). There were no significant differences in the serum malondialdehyde (MDA) content, catalase (CAT) and superoxide dismutase (SOD) activities of fattening Hu sheep among groups (P>0.05). 4) With dietary whole mulberry proportion increasing, the concentration of NH3-N in rumen fluid was increased linearly (P<0.05), and the rumen fluid NH3-N concentration in MUL4 group and MUL8 group was significantly higher than that in CON group (P<0.05). There were no significant differences in the concentration of total volatile fatty acids, acetate, propionate, isobutyrate, butyrate, isovalerate, valerate and acetate/propionate in rumen fluid among groups (P>0.05). The results indicate that under the conditions of this experiment, adding 4% or 8% whole mulberry in diets do not significantly affect the nutrient apparent digestibility and volatile fatty acids in rumen fluid of fattening Hu sheep, but 8% whole mulberry can improve the average daily gain and antioxidant capacity of fattening Hu sheep.

Cite this article

KOU Yufei , ZHU Wenbin , LI Fei , LI Fadi , WENG Xiuxiu , TANG Defu , HAO Shengyan , YUAN Lyufeng . Effects of Diets with Different Proportions of Whole Mulberry on Growth Performance, Nutrient Apparent Digestibility, Serum Antioxidant Indexes and Rumen Fermentation Parameters of Fattening Hu Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(5) : 2776 -2785 . DOI: 10.3969/j.issn.1006-267x.2021.05.036

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