【摘要】 文章旨在评估日粮添加不同水平的饲用枯草芽孢杆菌对9～24周龄育肥猪生长性能、养分表观消化及粪便特征的影响。将600头9周龄平均初始体重为(22.96±0.09)kg的商品猪随机分为3组,每组5个重复,每个重复40头。对照组饲喂基础日粮,T1和T2组肥猪分别饲喂基础日粮+100和200mg/kg枯草芽孢杆菌(3×10~8CFU/kg),试验共进行15周。结果 :与对照组相比,T2组15w育肥猪体重显著提高4.37%(P <0.05),同时T1和T2组1～15w育肥猪的平均日增重较对照组分别显著提高3.81%和5.35%(P <0.05),饲料报酬分别显著提高4.44%和4.44%(P <0.05)。T1和T2组育肥猪干物质表观消化率分别较对照组显著提高8.75%和9.37%(P <0.05),同时T1组育肥猪有机物表观消化率较对照组显著提高了6.13%(P <0.05)。日粮添加100和200mg/kg枯草芽孢杆菌可以显著降低6和15w育肥猪粪便中氨气浓度和大肠杆菌数量(P <0.05),同时T1和T2组15w育肥猪粪便中乳酸杆菌数量也显著高于对照组(P <0.05)。结论 :日粮添加100～200mg/kg饲用枯草芽孢杆菌(3×10~8CFU/kg)可改善9～24周龄育肥猪的饲料报酬,改善干物质表观消化率,降低粪中氨气浓度和大肠杆菌数量。更多还原

【Abstract】 This experiment was conducted to evaluate the effects of dietary supplementation of different levels of feeding bacillus subtilis on growth performance,nutrient apparent digestion and fecal characteristics of finishing pigs aged 9 ～ 24 weeks. Six hundred 9 ～ week ～ old commercial pigs with an average initial body weight of(22.96±0.09)kg were randomly divided into 3 groups with 5 replicates per group and 40 pigs per replicate. Pigs in control group were fed basal diet,and pigs in T1 and T2 groups were fed basal diet +100 and 200 mg/kg bacillus subtilis(3×10~8 CFU/kg),respectively. The experiment lasted for 15 weeks. Results :Compared with control group,body weight of 15 w finishing pigs in T2 group was significantly increased by 4.37%(P < 0.05),while average daily gain of 1 ～ 15 w finishing pigs in T1 and T2 groups was significantly increased by 3.81% and 5.35%(P < 0.05),respectively,and feed return was significantly increased by 4.44% and 4.44%(P < 0.05),respectively. Compared with the control group,the apparent digestibility of dry matter in T1 and T2 groups was significantly increased by 8.75% and 9.37%(P < 0.05),respectively,and the apparent digestibility of organic matter in T1 group was significantly increased by 6.13%(P < 0.05). The supplementation of 100 and 200 mg/kg bacillus subtilis significantly decreased the ammonia concentration and the number of Escherichia coli in fecal of pigs at 6 and 15 w(P<0.05),and the number of Lactobacillus in stool of pigs at 15 w in T1 and T2 groups was significantly higher than that in control group(P< 0.05). Conclusions :Dietary supplementation of 100 ～ 200 mg/kg feeding Bacillus subtilis(3×10~8 CFU/kg)can improve feed return,dry matter apparent digestibility,and reduce fecal ammonia concentration and Escherichia coli number of finishing pigs aged from 9 to 24 weeks.更多还原