泌乳驴的日粮蛋白水平对驴驹生长发育的影响

试验旨在研究泌乳驴的日粮蛋白水平对驴驹生长发育的影响.选取健康、体况良好的5岁龄、胎次(1.9±0.4)胎、体重(240±30)kg、泌乳日期(29±5)d的带驹德州三粉驴24头,分为3个处理组(H、M、L组),饲喂蛋白水平分别为13.18％、12.22％和11.34％的日粮.每个处理组4个重复,每个重复2头驴.正式试...

Effect of lactating donkeys fed with different protein levels of diets on the growth and development of donkey foals

The research explored the effect of dietary protein level of lactating donkey on the growth and development of donkey foals. Twenty four healthy and well-conditioned five-year-old three-pink Dezhou donkeys with similar average parity(1.9±0.4), average weight(240±30) kg and day in milk(29±5) d, were divided into three treatment groups(H, M,L groups), and were fed with three different protein levels of diets(13.18%, 12.22% and 11.34%), respectively. There were four replicates in each treatment group, with two donkeys in each replicate. The test period was eight weeks, divided into the early period(1~4 weeks) and the late period(5~8 weeks). At the same time, 24 donkey foals, with similar age(29±5) d and the body weight(48±8) kg, followed by female donkeys were divided into three treatment groups, and the ratio of male and female donkey foals was the same. In addition to breast milk, all donkey foals were fed with the same concentrates and roughage. The results showed that: in the early stage of the experiment, the dietary protein level of lactating donkeys had no significant effect on the daily weight gain of donkey foals(P>0.10). In the later stage of the experiment, with the increase of lactating donkey dietary protein level, the daily weight gain of donkey foals increased significantly(P<0.05), the feed conversion efficiency showed a certain increasing trend, but did not have a significant impact on its body size(P>0.10). Feeding high-protein diets for lactating donkey significantly or tends to significantly promote the contents of Asp, Thr, Ser and His in the plasma of donkey foals. Increasing the dietary CP level of lactating donkeys has a certain promotion effect on the daily weight gain of donkey foals, with 12.22% and 13.18% CP more effective.