在麦秸日粮条件下添喂β-受体激动剂对绵羊采食量与消化的影响

THE EFFECT OF β-AGONIST ON THE DM INTAKE AND NUTRIENT DIGESTION OF ROUGHAGE BASED DIET IN SHEEP

将8只新疆美利奴羯羊喂以麦草占88 %的粗饲料日粮 ,并在试验期喂给β-受体激动剂。结果表明 ,添喂 β-受体激动剂可使动物的干物质采食量由每只羊(713.8±107.1)g/d增加到(1028.0±152.6)g/d(P<0.05) ,并且使有机物、粗纤维和粗蛋白的消化率( %)分别由48.1±2.2、49.0±2.2和56.9±2.6提高到56.5±9.0(P<0.05)、60.1±8.5(P<0.01)和68.5±5.6(P<0.001)。不过 ,β-受体激动剂提高绵羊采食量、消化率特别是纤维素消化率的作用机理需进一步研究。

Xinjiang Merino wethers were fed with roughage diet containing 88% wheat straw,and during experimental period,the animals were fed β-agonist.The results shown that feeding β-agonist increased dry matter intake from(713.8±107.1) to(1028.0±152.6)g/day/sheep(P<0.05),and increased the digestibility(%) of organic matter,crude fiber and crude protein from 48.1±2.2,49.0±2.2 and 56.9±2.6 to 56.5±9.0(P<0.05),60.1±8.5(P<0.01)and 68.5±5.6(P<0.001) respectively.It is suggested that the mechanism of increasing DM intake and especially fiber digestion by β-agonist should be further studied.