Molecular Nutrition

Effects of Packaging Forage Sweet Sorghum Silage on Performance and Serum Indexes of Mutton Sheep

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  • 1. Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, Lanzhou University, Lanzhou 730020, China;
    2. State Key Laboratory of Pastoral Agriculture Ecosystem, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
    3. College of Life Science, Lanzhou University, Lanzhou 730000, China

Received date: 2017-11-01

  Online published: 2018-05-06

Abstract

The aim of this study was to investigate the effects of packaging forage sweet sorghum silage on growth performance and serum indexes of mutton sheep, in order to evaluate the feeding effect of packaging forage sweet sorghum silage for mutton sheep. Fourteen 3-to 4-month-old Dorper female sheep[(33.40±1.68) kg] and fourteen 3-to 4-month-old small-tailed Han female sheep[(25.70±1.50) kg] as test animals were divided into four groups according to roughage, including Dorper sheep sweet sorghum silage group (DG group, n=7), Dorper sheep corn silage group (DY group, n=7), small-tailed Han sheep sweet sorghum silage group (HG group, n=7) and small-tailed Han sheep corn silage group (HY group, n=7). The feeding experiment lasted for 3 months, and the body weight and blood samples were sampled on the morning of the day 30, 60 and 90 of experiment. The results showed that:1) the average daily feed intakes (ADFI) and average daily gain (ADG) of corn silage group (DY group+HY group, n=14) were significantly higher than those of sweet sorghum silage group (DG group+HG group, n=14) (P<0.01). 2) The serum total antioxidant capacity (T-AOC) for Dorper sheep group (DG group+DY group, n=14) was significantly higher than that for small-tailed Han sheep during the whole experiment (P<0.05); on day 60 of experiment, the serum malondialdehyde (MDA) content for Dorper sheep group was significantly lower than that for small-tailed Han sheep (P<0.05); on day 90 of experiment, the serum superoxide dismutase (SOD) activity for sweet sorghum silage group was significantly higher than that of corn silage group (P<0.05); on day 90 of experiment, serum MDA content of HY group was significantly higher than that of DY and HG group(P<0.05); on day 90 of experiment, the serum SOD activity for sweet sorghum silage group was significantly lower than that on day 60 and 90 of experiment (P<0.05). 3) The breed effects were significant on the serum urea nitrogen (UN) content, glutamic-pyruvic transaminase (GPT) and alkaline phosphatase (AKP) activities on day 60, 90 and 60 of experiment (P<0.05), respectively; the treatment effects were significant on the serum β-hydroxybutyrate (BHBA) content, GOT and AKP activities on day 90, 30 and 90, 60 of experiment (P<0.05), respectively; on day 90 of experiment, the serum GOT and AKP activities of HY group were significantly higher than those on day 30 of experiment (P<0.05). In summary, the performance of mutton sheep fed diets with packaging corn silage is superior to mutton sheep fed diets with packaging forage sweet sorghum silage. There will be existed in security risks when the higher ratio silage diets were fatten mutton sheep for a long time, but the packaging forage sweet sorghum silage may be more benefit to sheep liver health, and away from the "high blood fat" and reduce the chance for animal ketoacidosis than packaging corn silage.

Cite this article

ZHANG Xia, FU Xiaoyue, WANG Hucheng, HOU Mingjie, SHANG Zhanhuan . Effects of Packaging Forage Sweet Sorghum Silage on Performance and Serum Indexes of Mutton Sheep[J]. Chinese Journal of Animal Nutrition, 2018 , 30(5) : 1771 -1780 . DOI: 10.3969/j.issn.1006-267x.2018.05.019

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