不同水平酶制剂对肉牛生长性能、养分表观消化率及经济效益的影响
The effects of different levels of enzyme preparation on the growth performance,nutrient apparent digestibility,and economic benefits of beef cattle
许莹 1吴东龙2
作者信息
- 1. 桂林学院,广西 桂林 541006
- 2. 桂林华诺威生物科技有限公司,广西 桂林 541004
- 折叠
摘要
文章旨在研究不同水平酶制剂对肉牛生长性能、养分表观消化率及经济效益的影响.试验将 60 头初始体重一致[(415.82±13.65)kg],18 月龄左右的健康西门塔尔牛随机分为 4 组,每组 3 个重复,每个重复 5 头.对照组饲喂基础日粮,3 个试验组分别在基础日粮中添加 300、600、900 mg/kg的酶制剂.试验为期 60 d.结果表明:(1)与对照组相比,添加 600 mg/kg的酶制剂,肉牛平均日增重显著提高 11.70%(P＜0.05),饲料转化率显著降低9.04%(P＜0.05);添加 900 mg/kg的酶制剂,肉牛平均日增重显著提高 10.64%(P＜0.05),饲料转化率显著降低7.59%(P＜0.05).(2)与对照组相比,添加 300 mg/kg的酶制剂,肉牛干物质、中性洗涤纤维表观消化率显著提高(P＜0.05);添加600～900 mg/kg的酶制剂,肉牛干物质、粗蛋白质、中性洗涤纤维表观消化率显著提高(P＜0.05).(3)4 组肉牛的毛利润分别为 740.33、807.15、904.55、868.29 元.结论:基础日粮添加酶制剂能提高西门塔尔肉牛生长性能、养分表观消化率及经济效益.综合考虑肉牛的饲养效果,在本试验条件下,酶制剂的适宜添加水平为600 mg/kg.
Abstract
Objective:This experiment aims to investigate the effects of different levels of enzyme preparation on the growth performance,apparent nutrient digestibility,and economic benefits of beef cattle.Method:Sixty healthy Simmental cattle with the same initial body weight(415.82±13.65kg)aged about 18 months were randomly divided into 4 groups with 3 replicates per group and 5 cows per replicate.Hens in the control group were fed a basal diet,and three experimental groups were fed the basal diet supplemented with 300 mg/kg,600 mg/kg and 900 mg/kg enzyme preparations,respectively.The experiment lasted for 60 days.Results:(1)Compared with control group,supplemented with 600 mg/kg enzyme preparation,the average daily gain was increased by 11.70%(P＜0.05),and feed conversion rate was decreased by 9.04%(P＜0.05);The average daily gain of beef cattle increased by 10.64%(P＜0.05)and feed conversion rate decreased by 7.59%(P＜0.05)when 900 mg/kg of enzyme preparation was added.(2)Compared with control group,the apparent digestibility of dry matter and neutral detergent fiber of beef cattle supplemented with 300 mg/kg enzyme preparation was significantly increased(P＜0.05);The apparent digestibility of dry matter,crude protein and neutral detergent fiber of beef cattle was significantly increased by adding 600～900 mg/kg enzyme preparation(P＜0.05).(3)The gross profit of the four groups of beef cattle was 740.33 yuan,807.15 yuan,904.55 yuan and 868.29 yuan,respectively.Conclusion:The growth performance,nutrient apparent digestibility and economic benefit of Simmental beef cattle could be improved by adding enzyme preparation to base diet.Considering the feeding effect of beef cattle comprehensively,the appropriate supplemental level of enzyme preparation under the experimental conditions is 600 mg/kg.
关键词
酶制剂/肉牛/生长性能/养分表观消化率/经济效益Key words
enzyme preparation/beef cattle/growth performance/nutrient apparent digestibility/economic benefits引用本文复制引用
出版年
2024
NETL
NSTL
万方数据