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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (10): 162-172.DOI: 10.11686/cyxb2022472

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Effects of dietary broad bean skin on growth rate, slaughter performance, organ development and meat quality of Hu sheep

Zhao WANG1(), Jing LIU1, Hao YU1, Peng LI2, Wei-qiang NIU2, Yong-jie WAN1, Yan-li ZHANG1, Da-gan MAO1()   

  1. 1.College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China
    2.Qidong Ruipeng Animal Husbandry Co. ,Ltd. ,Qidong 226200,China
  • Received:2022-11-30 Revised:2023-01-12 Online:2023-10-20 Published:2023-07-26
  • Contact: Da-gan MAO

Abstract:

This study aimed to investigate the effect of a dietary broad bean skin supplement on growth rate, slaughter performance, organ development and meat quality of Hu sheep. Healthy 4-month-old male Hu sheep (n=60; 27.00±2.00 kg) were randomly divided into four treatment groups of 15 animals (3 replicates in each group and 5 sheep in each replicate) and fed diets containing 0% (control, Group C), 10% (Group I), 20% (Group II) and 30% (Group III) broad bean skin. The trial period was 60 days. Compared with the control group, the body weight, average daily feed intake and daily gain of Hu sheep in groups fed broad bean skin were very significantly increased (P<0.01). In Group III, the carcass weight (19.62±0.73 vs 17.75±0.86 kg) and live weight before slaughter (37.22±1.01 vs 34.76±0.71 kg) were very significantly increased (P<0.01) compared to Group C while the area of eye muscle was significantly increased (35.84±2.47 vs 27.84±0.13 cm2P<0.05); The liver weight tended to be increased (670.00±73.37 vs 588.00±49.87 g, P=0.071), the rumen weight (659.40±66.44 vs 548.00±75.48 g) and small intestine weight (1107.80±150.56 vs 901.00±41.32 g) were significantly increased (P<0.05); The cross-sectional area of muscle fiber was extremely significantly lower (584.67±32.01 vs 832.90±53.48 μm2P<0.01); The glutamic acid content was very significantly increased (37.74±1.64 vs 13.19±3.38 mg·g-1P<0.01); The contents of arginine (19.08±1.28 vs 11.25±2.39 mg·g-1) and nonessential amino acids (118.44±1.98 vs 90.59±9.56 mg·g-1) were significantly higher (P<0.05), and the contents of valine (12.40±1.09 vs 7.98±1.61 mg·g-1P=0.086) and essential amino acids (135.25±3.51 vs 106.79±11.14 mg·g-1P=0.071) tended to increase. In summary, the addition of broad bean skin to the diet improved the growth rate, slaughter performance, gastrointestinal development, muscular fiber and amino acid composition of Hu sheep, and the data provide a scientific basis for ration formulation incorporating broad bean skin in the production of Hu sheep.

Key words: broad bean skin, Hu sheep, growth performance, slaughter performance, organ development, meat quality