Effects of Silage Feeding Rape on Growth Performance, Slaughter Performance, Rumen Fermentation and Organ Development of Hu Sheep

  • YIN Yuyang ,
  • JIANG Yongqing ,
  • HUANG Jie ,
  • LI Yufeng ,
  • REN Yun ,
  • ZHU Jianfang
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  • 1. Huzhou Academy of Agricultural Sciences, Huzhou 313000, China;
    2. Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received date: 2020-07-22

  Online published: 2021-02-04

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Abstract

The purpose of this experiment was to investigate the effects of silage feeding rape on growth performance, slaughter performance, rumen fermentation and organ development of Hu sheep. Twelve healthy weaned Hu lambs with similar birth date, parity and weight were selected and randomly divided into 2 groups with 6 sheep per group. Lambs in 2 groups were fed the peanut vine total mixed ration (peanut vine group) and silage feeding rape total mixed ration (rape group), respectively. The experiment lasted for 60 days. The results showed that compared with the peanut vine group, the final weight and (P=0.043) and average daily gain (P=0.011) of rape group were significantly increased; the carcass weight had an increasing trend (P=0.062); the rumen (P=0.028), abomasum (P=0.029), jejunum (P=0.008) and small intestine (P=0.013) weights were significantly increased, and the duodenum weight had an increasing trend (P=0.055); the percentage of rumen to live weight before slaughter was significantly increased (P=0.033), while the percentages of duodenum (P=0.048) and caecum (P=0.016) to live weight before slaughter were significantly decreased; the crude protein content of longissimus muscle had an increasing trend (P=0.062), the contents of threonine (P=0.019), proline (P=0.010), glycine (P=0.008), alanine (P=0.016), valine (P=0.039), methionine (P=0.007), isoleucine (P=0.023), leucine (P=0.017), tyrosine (P=0.025), phenylalanine (P=0.012), lysine (P=0.033), arginine acid (P=0.024), total amino acids (P=0.028), essential amino acids (P=0.021) and non-essential amino acids (P=0.036) were significantly decreased, and the contents of serine (P=0.056), glutamic acid (P=0.052) and histidine (P=0.055) had an increasing trend; the contents of acetate (P=0.062) and total volatile fatty acids (P=0.087) in rumen fluid had an increasing trend. In conclusion, silage feeding rape replacing peanut vine in the same proportion increase the growth performance, rumen fermentation rate and gastrointestinal development of Hu sheep, and have the potential to increase the muscle protein content, improve the flavor and nutritional value of muscle, and increase the meat quality.

Cite this article

YIN Yuyang , JIANG Yongqing , HUANG Jie , LI Yufeng , REN Yun , ZHU Jianfang . Effects of Silage Feeding Rape on Growth Performance, Slaughter Performance, Rumen Fermentation and Organ Development of Hu Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(2) : 1153 -1162 . DOI: 10.3969/j.issn.1006-267x.2021.02.056

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