摘要
为了测定不同中性洗涤纤维(NDF)水平对肉羊日粮养分表观消化率的影响,选用4只体重相近[(23.5±0.6)kg]的4月龄杂交一代(小尾寒羊×无角陶赛特)羯羊,采用4×4拉丁方设计进行试验。4种试验日粮按等能等氮而NDF水平分别为30%、35%、40%和45%进行配制(干物质基础),定量饲喂。在本试验条件下,除45%NDF日粮的干物质表观消化率显著(P<0.05)低于其他日粮外,不同NDF水平对肉羊日粮的有机物、粗蛋白质和淀粉表观消化率均未产生显著影响(P>0.05);不同NDF水平并未显著影响(P>0.05)肉羊日粮的NDF、酸性洗涤纤维、纤维素和半纤维素表观消化率,但30%和45%NDF日粮相应指标均较低。综合分析,不同NDF水平对肉羊日粮养分的表观消化率有一定影响,肉羊日粮的适宜NDF水平为35%～40%。
To evaluate the effects of dietary NDF levels on apparent nutrients digestibility of mutton sheep, four 4-month-old crossbred （Small-tail Han sheep × Poll dorset） wethers were fed four iso-caloric and iso-nitrogen diets containing different NDF levels （30%, 35%, 40% and 45% of DM） with a limited feed intake in 4× 4 Latin-square design. The present results showed that dietary NDF levels did not influence （P〉0.05） the apparent digestibility of OM, CP and starch but the apparent digestibility of DM of the diet containing 45% NDF was significantly lower （P〈0.05） than the other groups. Dietary NDF levels also did not affect （P〉0.05） the apparent digestibility of NDF, ADF, cellulose and hemicellulose, but corresponding values in 30% and 45% NDF diets were lower than those in 35% and 40% NDF diets. In conclusion, dietary NDF levels had an influence on apparent nutrients digestibility of mutton sheep to some degree and the suitable level of NDF in ration of mutton sheep was 35% -40%.
出处
《动物营养学报》
CAS
CSCD
北大核心
2010年第1期70-74,共5页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家“863”课题(2002AA241181)
