复合微生态制剂的制备及其对雏鸡生长性能的影响

Preparation of compound micro-ecological preparation and its effect on growth performance of chicks

研究对动物来源的产朊假丝酵母菌和具有抑菌功能的乳酸菌进行固体发酵条件的筛选,制备活菌数高的功能性复合微生态制剂,通过在雏鸡日粮中添加不同微生态制剂,研究其对雏鸡生产性能的影响。试验经重复检测,验证出产朊假丝酵母固态发酵菌制剂和嗜酸乳杆菌制剂活菌数最高的发酵底物配比及最优发酵条件,并按照11的添加比例进行饲养试验。饲养试验选用1日龄的AA肉用公鸡雏240只,随机分成4组(对照组、产朊假丝酵母菌组、嗜酸乳杆菌组和复合菌添加组),每组5个重复,每个重复12只鸡。试验期28 d,分别在第1、15、29 d称重并记录采食量。研究结果表明:在活菌数最高的发酵底物配比及最优发酵条件下产朊假丝酵母菌固体发酵的活菌数稳定在1.05×1010CFU/g,嗜酸乳杆菌固体发酵的活菌数稳定在3.7×1010CFU/g;添加复合微生态制剂的雏鸡日增重在各个时期均显著高于对照组(P<0.05),而料肉比在3~4周和1~4周显著低于对照组(P<0.05)。由此可见,复合微生态制剂,可以提高肉仔鸡的生长性能,增加肉鸡养殖的经济效益。

In this study, the solid fermentation conditions of Candida utilis and Lactic Acid bacteria with antimierobial activity were screened, to prepare functional compound probiotics with high viable count, and study the effects of different preparationson the performance of chicks. Repeated test veri- fied that the fermentation substrate ratio and the optimal fermentation conditions of the highest in the solid state fermentation and Lactobacillus acidopbilus preparation, and the feeding experiment was car- ried out according to the proportion of 1 ： 1. 240 AA male broilers aged 1 days were selected and were randomly divided into 4 groups （control group, Candida utilis group, Lactobacillus acidopbilus group and the combination of the two groups）, each group had 5 replicates, each repeat had 12 broil- ers. The experimental period was 28 days, weigh and feed intake were recorded on day 1, 15, 29. The results showed that the number of viable Candida utilis bacteria in solid fermentation was stable at 1.05×10^10 cfu/g and the number of viable Lactic acid bacteria in solid fermentation was stable at 3.7×10^10cfu/g under the optimal fermentation conditions. The ratio of daily gain of broilers in the compound probiotics group were significantly higher than those in the control group （P〈0.05）. And the ratio of feed to meat in the compound probiotics group were significantly lower than those in three to four weeks and one to four weeks （P〈0.05）. Thus it can be seen, the growth performance of broilers can be improved and the economic benefits of broiler breeding can be increased by adding a combination of probiotics to the basal diet in a certain proportion.