Effects of Different Biological Treatments of Rice Straw on Growth Performance, Slaughter Performance and Organ Development of Mutton Sheep

FENG Wenxiao, CHEN Guoshun, TAO Lian, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2017.04.038

2017 , Vol. 29 >Issue 4: 1392 - 1400

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.04.038

Molecular Nutrition

Effects of Different Biological Treatments of Rice Straw on Growth Performance, Slaughter Performance and Organ Development of Mutton Sheep

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Feed Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Beijing 100081, China

Received date: 2016-10-01

Online published: 2017-04-14

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Abstract

In order to find the way to effectively utilize biological enzymes, the effects of different biological treatments of rice straw on growth performance, slaughter performance and organ development of mutton sheep were investigated in this experiment. Eighty "Dorper×small-tailed Han" F1 crossbred male lambs with the initial weight of (24.00±2.42) kg were randomly divided into four groups with five replicates in each group and four lambs per replicate. Lambs in blank control group were fed a rice straw diet, lambs in group Ⅰ were fed the rice straw diet which treated with bacterial and enzyme compound silage preparation, lambs in group Ⅱ were fed the rice straw diet which treated with compound enzyme preparation, and lambs in Leymus chinensis group wwere fed a Leymus chinensis diet. There was a adaptation period of 8 days followed by an experimental period of 60 days. The results showed as follows:the average daily gain and dry matter intake of sheep in group Ⅰ, group Ⅱ and Leymus chinensis group were significantly higher than those in blank control group (P<0.05), and the ratio of feed to gain was significantly lower than that in blank control group (P<0.05), but those in group Ⅰ, group Ⅱ and Leymus chinensis group were not significantly different (P>0.05). There was no significant difference in dressing percentage of sheep among all groups (P>0.05). The weight of head, feet, skin+wool, lungs, kidneys, reticulum, omasum, abomasum, small intestine and large intestine and their weight percentage of live weight before slaughter of sheep had no significant difference among all groups (P>0.05), the liver and rumen weights of sheep in group Ⅰ, group Ⅱ and Leymus chinensis group was significantly higher than those in blank control group (P<0.05). In conclusion, the rice straw is improved by bacterial and enzyme compound silage preparation, and the growth performance, slaughter performance and organ development of mutton sheep are close to the feeding effect of Leymus chinensis.

Key words： rice straw; compound enzyme preparation; micro ecological preparation; mutton sheep; growth performance

Cite this article

FENG Wenxiao, CHEN Guoshun, TAO Lian, DIAO Qiyu . Effects of Different Biological Treatments of Rice Straw on Growth Performance, Slaughter Performance and Organ Development of Mutton Sheep[J]. Chinese Journal of Animal Nutrition, 2017 , 29(4) : 1392 -1400 . DOI: 10.3969/j.issn.1006-267x.2017.04.038

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