摘要
本试验旨在研究纳豆芽孢杆菌对断奶后犊牛生产性能、料重比、胴体率等指标的影响。试验选取12头60日龄左右中国荷斯坦奶牛公犊牛,采用完全区组设计,按体重差异随机分为对照组、试验1组和试验2组。试验中直接给犊牛饲喂纳豆芽孢杆菌菌液,至其开食料采食量达到规定要求时断奶,之后再饲喂7周屠宰,称胴体重。结果表明:(1)断奶后,试验1组犊牛日增重较对照组提高了16.2%(P=0.09),试验2组提高了22.1%(P=0.02);(2)与对照组相比较,试验1组和试验2组犊牛日采食量分别提高了6.1%(P>0.05)和5.6%(P>0.05);(3)试验1组、试验2组料重比也有降低的趋势,但与对照组差异不显著(P>0.05);(4)试验1组、试验2组胴体率较对照组有显著提高(P=0.01)。
The experiment was conducted to study the effects of Bacillus subtilis Natto on growth performance of weaned calves. Twelve male Holstein calves were used in a complete randomized block design, and allotted to 3 groups： （1） control group; （2） treatment 1 fed with N1 type Bacillus subtilis Natto; （3） treatment 2 fed with Na type Bacillus subtilis Natto. The experiment ended on the seventh week after the weaning, and the calves were slaughtered in 2 days when the experiment end. The results were as follows： compared with the control group （1） average daily weight gain of calves in treatment 1 were increased to 16.2% （ P = 0.09）, and that of treatment 2 increased to 22.1% （ P = 0.02） ; （2） the DMI in the treatment 1 and treatment 2 were increased to 6.1% （P〉0.05） and 5.6% （P〉0.05）, respectively; （3） the feed conversion ratio were decreased of treatment 1 and treatment 2, but the difference was not significant （P〉0.05）; （4） the carcass rate of treatment 1 and treatment 2 were significantly enhanced. （P = 0.01）.
出处
《动物营养学报》
CAS
CSCD
北大核心
2008年第2期158-162,共5页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
"十一五"科技支撑计划项目(2006BAD12B03
2006BAD04A08)
关键词
纳豆芽孢杆菌
开食料
犊牛
生长性能
料重比
Bacillus subtilis Natto
Starter
Calf
Growth performance
Feed conversion ratio
