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Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (3): 170-184.DOI: 10.11686/cyxb2025136

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Effects of diets with different concentrate-to-roughage ratios on the growth rate, serum biochemical indexes, and rumen fermentation of Guangfeng goats

Hao-bin JIA1(), Hao-yun JIANG1, Ai-hua LI2, Hai-bo WANG1,3, Sun-quan LIN2, Yue PAN1,4, Jun-hong HUO1(), Jin-shun ZHAN1()   

  1. 1.Jiangxi Academy of Agricultural Sciences Institute of Animal Husbandry and Veterinary Medicine,Key Laboratory of Green and Healthy Livestock and Poultry Breeding in Jiangxi Province,Nanchang 330200,China
    2.Guangfeng District Agricultural and Rural Industry Development Service Center,Shangrao 334000,China
    3.College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China
    4.College of Animal Science and Veterinary Medicine,Tianjin Agricultural University,Tianjin 300384,China
  • Received:2025-04-17 Revised:2025-06-03 Online:2026-03-20 Published:2026-01-19
  • Contact: Jun-hong HUO,Jin-shun ZHAN

Abstract:

We evaluated the effects of different concentrate-to-roughage ratios on the growth rate, serum biochemical indexes, and rumen fermentation of Guangfeng goats. Thirty-nine healthy Guangfeng goats with similar body weight were randomly divided into three treatment groups (n=13). The concentrate-to-roughage ratios in the three groups were 40∶60 (I), 45∶55 (II), and 50∶50 (III), and the experimental period was 90 days. The results indicate that: 1) Different concentrate-to-roughage ratios in the diets had no significant effects on the body height, chest circumference, cannon circumference, average daily gain, average daily feed intake, and feed conversion ratio of Guangfeng goats (P>0.05); however the body length of group III was significantly greater than that of group I (P<0.05). 2) The serum total protein, albumin, globulin, and total cholesterol levels in group III were significantly higher than those of the other groups; the tetraiodothyronine content was significantly lower than that in group II, and the triiodothyronine content was significantly lower than that in the other groups (P<0.05). The serum urea nitrogen content in group I was significantly lower than that in the other groups (P<0.05). 3) The 45-minute pH value of muscle in group II was significantly higher than that in other groups, and the carcass weight and cooked meat rate were significantly lower than those in the other groups (P<0.05). The net meat percentage in group III was significantly higher than that in group II (P<0.05). The contents of lysine, serine, non-essential amino acids, umami amino acids, sweet amino acids, behenic acid, eichlerianic acid, arachidonic acid, and polyunsaturated fatty acids in the muscle of group II were significantly higher than those in the muscle of group I (P<0.05). The loin muscle area of group III was significantly lower than that of the other groups (P<0.05). The shear force, rate of water loss, drip loss rate, and hexanoic acid content in the muscle of group III were significantly lower than those in group I, and the redness, yellowness, and proline content in the muscle of group III were significantly higher than those in group I (P<0.05). 4) The rumen papilla length in group III was significantly higher than that in group I, and the ileal villus length was significantly higher than that in group II (P<0.05); the rumen organ index in group I was significantly lower than that in the other groups, and the muscle fiber diameter was significantly higher than that in the other groups (P<0.05). 5) The pH value of the rumen in group III was significantly higher than that in group I, and the acetic acid/propionic acid was significantly higher than that in group II (P<0.05). In conclusion, different concentrate-to-roughage ratios of diets affect the metabolism of Guangfeng goats and their muscle quality.

Key words: Guangfeng goat, concentrate-to-roughage ratio diet, production performance, serum biochemical indexes, rumen fermentation parameters