家畜生态学报2017，Vol.38Issue(4)：38-43,6.
日粮尿素添加水平对秦川肉牛瘤胃发酵性能的影响
Effects of Urea Supplementation on Rumen Fermentation Parameters of Qinchuan Beef Cattle
摘要
Abstract
To research the effect of urea (non protein nitrogen) supplement on rumen fermentation environment for Qinchuan beef cattle,three Qinchuan bulls,with rumen fistula,were fed the diet supplied with different urea level,in five treatment stages.Before the treatment,there was a 25-day's preliminary feeding period,in which every bull was fed with normal diet.Then,urea was added in normal diet,at 0％ (dry matter percentage,the control group),0.5％ (group A),1.0％(group B),1.5％ (group C) and 2％ (group D),respectively,in each stage.Every stage has 25 days.And the rumen fluid contents was collected per 5 days to detect the pH,ammonia nitrogen (NH3-N),microbial protein (MCP) and volatile fatty acid (VFA).The result showed that the pH value presented a trend of decreasing first and then increasing,with the urea concentration rising.And the lowest pH was 6.36-±-0.17 (B group),significantly lower than the other groups (P＜0.05).Between the all treatment groups,there was much significant difference in pH value(P＜0.05),too.For total VFA,all treatment groups were significantly higher than control group(P＜0.05).And the B group had the highest total VFA level,with a significant difference(P＜0.05).Compared with the control group,A group and B group was significantly higher in all VFA items(P＜0.05).But between A group and B group,there was no significant difference (P＞0.05) in VFA items,except the total VFA.In NH3-N,each treatment group was significantly higher than control group.And the D group had the significantly highest level compared with the other treatment group.Meanwhile,the treatment groups were significantly higher than control group,except the D group,in microbial protein content.The B group had the highest microbial protein content compared with the other treatment groups.To sum up,the B group had the best effect of urea addition.So,it is suggested that the diet with 1％ urea should be the safe and effective non protein nitrogen dosage for Qinchuan cattle.关键词
秦川肉牛/日粮/尿素添加水平/瘤胃发酵参数Key words
Qinchuan beef cattle/diet/urea addition level/rumen fermentation parameters分类
农业科技引用本文复制引用
李玉帅,吴森,曹阳春,昝林森..日粮尿素添加水平对秦川肉牛瘤胃发酵性能的影响[J].家畜生态学报,2017,38(4):38-43,6.基金项目
国家肉牛牦牛产业技术体系(CSRS-38) （CSRS-38）
陕西省科技统筹计划(2014KTZB02-02) （2014KTZB02-02）
