杂交构树青贮对杜寒杂交肉羊生产性能、血清指标及背最长肌脂肪酸组成的影响

doi:10.11843/j.issn.0366-6964.2019.07.011

摘要/Abstract

摘要： 旨在研究饲粮中添加杂交构树青贮对肉羊生长性能、血清指标及背最长肌脂肪酸组成的影响。本研究用3月龄左右，体重（26±2.5） kg，体况良好的杜泊×小尾寒羊杂交肉羊96只，分为4组，每组24只，公母各半，A组为对照组，无添加，B、C和D组为试验组，分别添加杂交构树青贮15%、30%和45%（干物质基础）。试验期70 d。结果表明：1）杂交构树青贮对肉羊具有很好的适口性，提高了干物质采食量，D组平均日增重（ADG）及干物质采食量（DMI）显著高于A和B组（P<0.05）；2）与对照组相比，杂交构树青贮对肉羊机体的免疫能力和抗氧化能力有促进作用，D组血清的免疫球蛋白A（IgA）、免疫球蛋白G（IgG）和免疫球蛋白M（IgM）含量显著高于A和B组（P<0.05）；D组血清总抗氧化能力（T-AOC）、过氧化氢酶（CAT）活性显著高于A组（P<0.05），而丙二醛含量显著低于A组（P<0.05）；3）饲粮中添加杂交构树青贮提高了肉羊背最长肌中n-3多不饱和脂肪酸（n-3 PUFA）含量，B、C、D组显著高于A组（P<0.05）。本试验结果揭示，饲粮中添加杂交构树青贮提高了肉羊的生长性能、免疫力和抗氧化能力，促进肉羊健康，同时提高了肉羊背最长肌中n-3 PUFA含量，改善了羊肉脂肪酸的构成，在3个构树青贮添加组中，最大添加组（D组）的效果最显著。

Abstract: The aim of this study was to investigate the effect of broussonetia papyrifera L. (Paper mulberry) silage on growth performance, biochemical indexes of serum and fatty acid composition in the longissimus dorsi muscle of Dorper×Thin-tailed Han crossbred sheep. Ninety-six healthy sheep weighted (26±2.5) kg on 3 months old were allocated into 4 groups with 24 sheep per group, 12 male sheep and 12 female sheep in each group. The sheep in control group (A) were fed the diet without Paper mulberry silage, the sheep in experimental group (B, C and D) were fed the diets with 15%, 30% and 45% (dry matter basis) Paper mulberry silage, respectively. The experiment lasted for 70 d. The results showed that:1) Paper mulberry silage was very palatable to sheep, increased dry matter intake. The average daily gain (ADG) and dry matter intake (DMI) of D group were significantly higher than that of A and B groups (P<0.05); 2) Compared with control group, Paper mulberry silage promoted the immunity and antioxidation capacity of sheep, the content of IgA, IgG and IgM in serum of D group were significantly higher than those of A and B groups (P<0.05), the total antioxidant capacity (T-AOC) and activity of catalase (CAT) of serum in D group were significantly higher than those in A group (P<0.05), the content of malondialdehyde (MDA) of D group was significantly lower than that of A group (P<0.05); 3) The addition of Paper mulberry silage to the diet increased the content of n-3 polyunsaturated fatty acids (n-3 PUFA) in the longissimus dorsi muscle of sheep, and the content of n-3 PUFA of B,C,D groups was significantly higher than that of A group (P<0.05). The results showed that Paper mulberry silage supplementation might improve the growth performance, immunity and antioxidant capacity of sheep, was good for the health of sheep, meanwhile, the content of n-3 PUFA in the longissimus dorsi muscle of sheep increased and the fatty acids composition in muscle was improved. D group had the most significant effects in the 3 silage addition groups.

中图分类号:

S826.5

司丙文, 徐文财, 郭江鹏, 崔凯, 王淑艳, 屠焰, 刁其玉. 杂交构树青贮对杜寒杂交肉羊生产性能、血清指标及背最长肌脂肪酸组成的影响[J]. 畜牧兽医学报, 2019, 50(7): 1424-1432.

SI Bingwen, XU Wencai, GUO Jiangpeng, CUI Kai, WANG Shuyan, TU Yan, DIAO Qiyu. Effect of Broussonetia papyrifera L. (Paper mulberry) Silage on Growth Performance, Biochemical Indexes of Serum and Fatty Acid Composition in the Longissimus dorsi Muscle in Dorper×Thin-tailed Han Crossbred Sheep[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2019, 50(7): 1424-1432.

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