葡萄渣单宁对绵羊养分消化代谢及瘤胃发酵的影响

doi:10.11686/cyxb20140435

摘要/Abstract

摘要： 选用4只体重28 kg左右且安装永久瘤胃瘘管羯羊[萨福克(Suffolk)♂×小尾寒羊(small tail Han-yang)♀],采用4×4拉丁方试验设计,通过消化代谢试验,研究饲料中不同含量葡萄渣单宁对绵羊养分消化代谢及瘤胃发酵的影响。试验共设4个处理,葡萄渣缩合单宁含量分别为0.00,0.85,1.70和2.25 g/kg DM。结果表明,葡萄渣单宁对绵羊干物质、有机物、中性洗涤纤维、酸性洗涤纤维、钙和磷的表观消化率没有产生显著影响(P>0.05),但显著提高绵羊氮表观消化率和存留率(P<0.05);显著降低绵羊瘤胃液总氮和蛋白氮浓度而显著提高尿素氮浓度(P<0.05),对绵羊瘤胃液氨氮浓度没有产生显著的影响(P>0.05);显著提高绵羊瘤胃液丙酸摩尔比而显著降低丁酸摩尔比和乙丙比(P<0.05),对绵羊瘤胃液pH、总挥发性脂肪酸浓度和乙酸及其他酸摩尔比没有产生显著的影响(P>0.05)。此外,试验结果表明饲料中添加2.25 g/kg DM含量的葡萄渣单宁,能够提高绵羊对饲料蛋白质的利用率。

Abstract: Four sheep (Suffolk♂×small tail Han-yang♀) of average weight 28 kg were fitted with permanent rumen fistula to investigate the effects of tannins from grape pomace on digestion,metabolism and rumen fermentation in sheep in a 4×4 Latin square design experiment. Condensed tannin (CT) contents in treatments 1,2,3 and 4 were 0.00,0.85,1.70 and 2.25 g/kg DM,respectively. Tannins from grape pomace did not significantly impact the apparent digestibility of dry matter,organic matter,neutral detergent fiber,acid detergent fiber,calcium and phosphorus. However,it significantly (P<0.05) improved the apparent digestibility and retention of nitrogen. It also significantly (P<0.05) reduced the concentration of total nitrogen and protein nitrogen and raised the concentration of urea nitrogen in ruminal fluid,but did not significantly influence the concentration of ammonia nitrogen. In addition,it significantly (P<0.05) increased the propionate molar ratio but reduced the butyrate molar ratio and acetate/propionate ratio. It did not significantly affect the pH,the concentration of total volatile fatty acid,acetate and other acids molar ratio in ruminal fluid. It is concluded that 2.25 g/kg DM tannins from grape pomace can improve feed protein utilization.

中图分类号:

S826.4

赵栋，郑琛，李发弟，李冲，李廷福. 葡萄渣单宁对绵羊养分消化代谢及瘤胃发酵的影响[J]. 草业学报, 2014, 23(4): 285-292.

ZHAO Dong,ZHENG Chen,LI Fa-di,LI Chong,LI Ting-fu. Effects of tannins from grape pomace on digestibility, metabolism and rumen fermentation in Sheep[J]. Acta Prataculturae Sinica, 2014, 23(4): 285-292.

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