China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (4): 1343-1351.doi: 10.16431/j.cnki.1671-7236.2022.04.016

• Nutrition and Feed • Previous Articles     Next Articles

Effects of Compound Nutrients on Growth Performance,Nutrient Apparent Digestibility and Serum Parameters of Fattening Sheep

HU Yuchao1,2, GUO Tao1,2, YANG Yi1,2, YANG Lei1,2, CUI Zhiwei1,2, MAO Jinju1,2, GUO Hui1,2, WANG Chunyuan1,2, WANG Yuan1,2, AN Xiaoping1,2, QI Jingwei1,2   

  1. 1. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Inner Mongolia Herbivorous Livestock Feed Engineering and Technology Research Center, Hohhot 010018, China
  • Received:2021-09-13 Online:2022-04-05 Published:2022-03-25

Abstract: 【Objective】 The objective of this study was to evaluate the effects of compound nutrients mainly composed of fermented wheat bran polysaccharides,cinnamaldehyde,eugenol and capsicum oleoresin on growth performance,nutrient apparent digestibility and serum biochemical parameters of Dorper×Thin-tailed Han crossbred fattening sheep,expecting to provide a certain theoretical basis for the application of compound nutrients in the production of mutton sheep.【Method】 A single-factor randomized block design was adopted in the experiment,thirty-six 2-3-month-old Dorper×Thin-tailed Han crossbred lambs with body weight of (29.69±3.11) kg were randomly divided into 3 groups with 6 replicates per group and 5 lambs per replicate.Lambs in the control group (CON) were fed with basal diets,lambs in the groups Ⅰ and Ⅱ were fed with basal diets supplemented with 2.5 and 5.0 g/kg compound nutrients,respectively.The pre-experimental period lasted for 14 days,and the experimental period lasted for 60 days.The sheep were weighed at the beginning and ending of the experiment to determine their growth performance,blood samples were collected to determine serum physiological and biochemical indexes,antioxidant and immune ability.Fecal samples and feed samples were collected continuously for 7 days on the 24th to 30th day and 54th to 60th day of the trial period,once in the morning and once in the evening,to determine the apparent digestibility of nutrients.【Result】 ① Compared with control group,the final weight and average daily gain of the fattening sheep in group Ⅰ were increased significantly (P<0.05),and the feed-to-gain ratio was decreased,but the difference was not significant (P>0.05).The dry matter intake of the fattening sheep in the experiment groups Ⅰ and Ⅱ was significantly increased (P<0.05).② Compared with control group,the apparent digestibility of dry matter and organic compound of groups Ⅰ and Ⅱ were significantly increased on the 24th to 30th day (P<0.05).③ Dietary compound nutrients had no significant effect on serum biochemical parameters of fattening sheep (P>0.05).Compared with control group,at the end of the trial,the content of serum superoxide dismutase (SOD) and immunoglobulin M(IgM) in groups Ⅰ and Ⅱ were significantly increased (P<0.05),the contents of serum glutathione (GSH) and immunoglobulin G(IgG) in group Ⅱ were significantly reduced (P<0.05),the content of serum malondialdehyde (MDA) in group Ⅰ was significantly reduced (P<0.05).【Conclusion】 Adding 2.5 g/kg of compound nutrients to the diet could increase dry matter intake and apparent digestibility,improve immunity and increase the body’s antioxidant level of fattening sheep.

Key words: compound nutrients; fattening sheep; growth performance; nutrient apparent digestibility; serum parameters

CLC Number: