摘要
试验旨在探究不同化学方法处理的高粱秸秆对肉牛的生长性能、养分表观消化率及血清生化指标的影响。选取体重相近、健康的育成牛35头,随机分为5组,每组7个重复,每个重复1头牛。A组(对照组)肉牛饲喂未经特殊处理的高粱秸秆,B组、C组、D组肉牛分别饲喂经“三化”处理、碱化复合处理、氨化处理的高粱秸秆,E组肉牛饲喂含有苜蓿的日粮。结果表明,B组、D组肉牛平均日增重分别比A组提高了12.36%、6.74%(P<0.05),B组、C组肉牛平均日采食量显著高于A组(P<0.05)。C组、D组肉牛粗蛋白表观消化率显著高于A组(P<0.05),酸性洗涤纤维表观消化率显著降低(P<0.05),各处理组肉牛中性洗涤纤维表观消化率均显著低于A组(P<0.05)。B组、C组、D组肉牛瘤胃氨态氮含量显著高于A组(P<0.05),C组、D组肉牛瘤胃总挥发性脂肪酸含量显著高于A组(P<0.05),B组、C组、D组肉牛瘤胃微生物含量比A组分别提高16.00%、27.58%、28.68%(P<0.05)。各处理组肉牛血清尿素氮含量显著高于A组(P<0.05)。研究表明,经化学处理的高粱秸秆可以提高肉牛的生长性能,对肉牛健康无不利影响,氨化处理高粱秸秆的饲喂效果较好。
The experiment was to investigate the effect of sorghum straw treated with different chemical methods on growth performance,nutrient apparent digestibility and serum biochemical indexes of beef cattle.A total of 35 healthy cattle with similar body weight were randomly divided into five groups,with seven replicates in each group and one cattle in each replicate.The beef cattle in group A(control group)were fed with sorghum straw without special treatment,the beef cattle in group B,group C and group D were fed with sorghum straw treated by"three chemical method"treatment,alkaline compound treatment and ammoniation treatment,respectively,and the beef cattle in group E were fed with alfa.The results showed that compared with group A,the average daily gain of beef cattle in group B and group D was increased by 12.36%and 6.74%(P<0.05),respectively,and the daily feed intake in group B,and group C was significantly higher than that in group A(P<0.05).The apparent digestibility of crude protein in group C and group D was significantly higher than that in group A(P<0.05),the apparent digestibility of acid detergent fiber was significantly decreased(P<0.05),and the apparent digestibility of neutral detergent fiber in all treatment groups was significantly lower than that in group A(P<0.05).The rumen ammonia nitrogen content of group B,group C and group D was significantly higher than that of group A(P<0.05),and the total volatile fatty acid content of group C and group D was significantly higher than that of group A(P<0.05).Compared with group A,the microbial content of group B,group C and group D was increased by 16.00%,27.58%and 28.68%,respectively(P<0.05).The serum urea nitrogen content of beef cattle in treatment group was significantly higher than that in group A(P<0.05).The experiment indicates that by the chemical treatment of sorghum straw can improve the growth performance of beef cattle,no adverse impact on the health of beef cattle feeding of sorghum straw ammoniation processing effect is better.
作者
赵峥嵘
贾新彦
孔丹
孙瑞琳
古洋
ZHAO Zheng-rong;JIA Xin-yan;KONG Dan;SUN Rui-lin;GU Yang
出处
《饲料研究》
CAS
北大核心
2023年第19期10-15,共6页
Feed Research
基金
中原英才计划—中原教学名师支持项目(项目编号:豫组通[2020]48号)。
关键词
肉牛
高粱秸秆
化学处理
生长性能
养分表观消化率
beef cattle
sorghum straw
chemical treatment
growth performance
nutrient apparent digestibility
