摘要
应用６ 头安装瘤胃瘘管的１ 岁龄杂交肉用阉牛，研究饲料添加瘤胃素（Ｒｕｍｅｎｓｉｎ） 和人为控制采食量变化时，瘤胃内酸度（ｐＨ） 的变化效果和发展趋势。试验共进行１１０ｄ ， 试验牛首先通过２０ ｄ 的适应期，饲喂含精料９２－５％ 的肥育试验日粮， 然后转入自由采食期、低变化期（ 采食量变化为±１－０ ｋｇ／ｄ） 和高变化期（ 采食量变化为±２－０ ｋｇ／ｄ）３ 个肥育阶段。在整个试验期内，持续监测与记录试验动物的采食量、采食速度和瘤胃ｐＨ 的变化。结果表明：添加瘤胃素提高了瘤胃平均ｐＨ 水平，即降低了酸度；缩短了ｐＨ 在５－６ 以下水平的持续时间。此外，当采食量大幅度变化时，它具有稳定采食量、缓冲瘤胃ｐＨ 波动的作用，从而减少了酸中毒的发生率。
Six ruminally fistulated yearling steers were used to evaluatethe effect of Rumensin and controlfeed intake variation on the changes and developing trends of ruminal pH- The studies were conducted for 110 days- Steers were adapted to 92-5 % concentrate finishing trial diet for 20 days and then subjected to three levels of feed intake variation :ad libitum ;low feed intake variation ( ±1-0 kg/d) ;high feed intake variation ( ±2-0 kg/d)- Feed intake,rate offeed in take and ruminal pH were monitored and recorded continuously throughout the entire trial- Re sultsindicated that Rumensin reduced acidosis by elevating average ruminalpHand decreasing du ration ofruminal pHbelow 5-6- In addition , Rumensin stabilized rate offeed intake and daily ru minal pHfluctuation at high level offeed intake variation-
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
1999年第4期1-5,共5页
Journal of Jilin Agricultural University
基金
中加合作研究资助
