口感化及颗粒化开食料对早期断奶羔羊生长和胃肠道发育的影响

Effect of texturized and pelleted starter on growth and gastrointestinal development of early weaning lambs

分析探讨口感化及颗粒化开食料对早期断奶羔羊生长和胃肠道发育的影响。选取新生健康的双羔湖羊公羔42只,随机分为两组,分别饲喂颗粒化和口感化开食料,试验期42 d。两组羔羊21日龄之前的采食量、体重和绝对生长的变化趋势相似。21日龄以后,口感化开食料组羔羊的采食量、体重、绝对生长和相对生长均明显高于颗粒化开食料组,42日龄体重、后两周的采食量及15~21日龄的相对生长率在两组间有显著差异(P<0.05)。口感化开食料还显著提高(P<0.05)了羔羊42日龄时的育肥指数、体长指数、胸围指数、管围指数和断奶前的瘤胃质量和瘤胃/胴体。以上结果表明,与颗粒化开食料相比,口感化开食料更有利于羔羊早期断奶前后的瘤胃发育、采食量提高、体重和体尺的发育,但对其他胃室及肠道发育没有影响。

The purpose of this study was to evaluate the effect of texturized and pelleted starter on the growth and gastrointestinal development of early weaning lambs. Forty-two newborn, healthy male lambs were selected and randomly assigned to two groups;lambs were fed pelleted, and texturized starter feed, respectively. The experiment lasted for 42 days.The changes in feed intake, body weight, and absolute growth of lambs in two groups were similar before 21 days old. After21 days of age, the starter feed intake, body weight, absolute growth, and relative growth of lambs fed texturized starter feed were higher than those fed with pelleted starter feed. There were differences(P<0.05) in the body weight at 42 days of age,the starter feed intake in the last two weeks, and the relative growth rate at 15~21 days of age. The fattening index, body length index, chest circumference index, and tube circumference index at 42 days, and rumen weight and rumen weight/preweaning carcass weight were also improved(P<0.05) in the texturized group. Compared with the pelleted starter, the texturized starter was more beneficial to rumen development, an increase of feed intake, and body weight and body size of lambs pre-and post-weaning, but there was no effect on the development of other stomach chambers and intestines.