枯草芽孢杆菌对肥育猪生产性能和经济效益的影响

Effects of dietary bacillus subtilis on the growth performance and economic benefit of finishing pigs

试验选用杜长大三元杂交50kg左右健康猪368头,根据体重随机分为4组,每组4个重复。对照组饲喂玉米-豆粕型基础饲粮,试验组在玉米-豆粕型饲粮基础上添加枯草芽孢杆菌100、200、300g/t。结果表明,与对照组相比,饲粮中添加300g/t枯草芽孢杆菌显著地提高了肥育猪饲料转化率(P<0.05),降低料肉比5.3%,并且其个体重达到最大。添加枯草芽孢杆菌对肥育猪消化道疾病有改善,随着添加水平的增加消化道药物使用逐渐减少,与对照组相比,300g/t枯草芽孢杆菌组消化道药物使用最少。从经济效益上分析,与对照组相比,每吨饲粮添加300g枯草芽孢杆菌可以使每头猪多获益43元。由此可见,饲粮中添加300g/t枯草芽孢杆菌可以提高肥育猪生产性能和经济效益。

A total of 368 Duroc× Landrace X Large finishing pigs were randomly allocated to four treatments with 4 replicates per treatment according to body weight. Diets were： control without Bacillus subtilis; 100 g/t Bacillus subtilis supplementation; 200 g/t Bacillus subtilis supplementation and 300g/t Bacillus subtilis supplementation. Dietary 300 g/t Bacillus subtilis increased FCR （P〈0. 05） ,and decreased the use of gastrointestinal drugs compared with the control group. Finishing pigs in 300 g/t Bacillus subtilis supplementation group can make another 43 yuan in profit compared to the control. In conclusion, the re- sults indicate that bacillus subtilis supplementation can improve the growth performance and economic benefit of finishing pigs.