日粮氮硫比对肉羊生产性能及养分代谢的影响  

Influence of different ratios of nitrogen and sulfur on performance and nutrient utilization in sheep

作　　者：张微[1] 王润莲[2] 高振刚[1] 贾志海[1] 朱晓萍[1] 

机构地区：[1]中国农业大学动物科学技术学院,北京100094 [2]广东海洋大学动物科学系,广东湛江524088

出　　处：《中国农业大学学报》2008年第2期49-52,共4页Journal of China Agricultural University

基　　金：“十一五”国家科技支撑项目(2006BAD14B07)

摘　　要：研究日粮不同氮硫比对肉羊生产性能及养分代谢的影响。选40只生长发育正常、体重相近(27.08±0.86)kg的6月龄杂交肉羊公羔,日粮添加4种不同含量硫(质量分数)(0.18%,N∶S=10.5;0.20%,N∶S=9.0;0.25%,N∶S=7.5和0.30%,N∶S=6.0),饲养40 d之后进行代谢测定。结果表明:肉羊日粮中不同的含硫量和氮硫比对其生产性能和养分利用有明显的影响,含硫量为0.25%、氮硫比为7.5的日粮明显促进肉羊的生长速度和饲料利用效率,并显著提高养分的表观消化率及蛋白利用率;其平均日增重和料重比分别为0.26 kg和5.15(对照组为0.20 kg和6.65),日粮DM、OM、NDF、ADF和蛋白利用率分别达65.93%、69.13%、62.10%、56.97%和41.41%。以羊草和苜蓿草为主的生长肉羊日粮中适宜的含硫量为0.25%、氮硫比为7.5。The experiment was aimed to study the effects of different sulfur or ratios of nitrogen and sulfur on performance and nutrient utilization in sheep. Forty healthy wethers with an average weight （27.06±0.86） kg were divided randomly into 4 groups which were fed with 4 diets supplied either 0.18%, 0.20%, 0.25% and 0.30% of sulfur or 4 ratios of nitrogen and sulfur （10.5 ： 1, 9.0 ： 1, 7.5 ： 1 and 6.0 ： 1） respectively. The feeding experiment lasted for 40 days and followed by the metabolism trial with 10 day adaptation period and subsequent 5 day collection period. The dietary sulfur level or the ratios of nitrogen and sulfur had marked influence on sheep performance and nutrient utilization. The optimum dietary sulfur or the ratio of nitrogen and sulfur significantly improved the growth and feed conversion rate of sheep with an average daily gain of 0.26 kg, feed/gain of 5.15, and digestibility of DM, OM, NDF, ADF and the utilization of nitrogen with values of 65.93%, 69.13%, 62.10%, 56.97%, 41.41% at the end of feeding experiment. The optimum dietary sulfur or the ratio of nitrogen and sulfur was recommended to be 0.25% and 7.5 in the Chinese wild rye and alfalfa hay based diets of sheep.

关 键 词：绵羊 氮 硫 生产性能 养分代谢 

分 类 号：S816.5[农业科学—饲料科学] S826[农业科学—畜牧学]