水解单宁酸对肉仔鸡肠道菌群和粪便中氨气含量的影响

Effects of hydrolyzed tannin acid on intestinal flora and the content of NH_3 in faeces of broilers

为研究水解单宁酸对肉仔鸡肠道菌群和粪便中氨气含量的影响,本试验选取1日龄健康AA肉仔鸡2000只,随机分为5组,每组4个重复,每个重复100只鸡。Ⅰ组为对照组,饲喂基础日粮,Ⅱ、Ⅲ、Ⅳ、Ⅴ组为试验组,分别添加0.05%、0.10%、0.15%和0.20%的水解单宁酸,试验期42 d。结果显示,日粮中添加水解单宁酸可以使42日龄肉鸡肠道内有益菌(双歧杆菌和乳酸杆菌)增殖,抑制有害菌(大肠杆菌)的生长,其中Ⅲ、Ⅳ、Ⅴ组与对照组相比差异显著(P<0.05)。日粮中添加水解单宁酸可以降低粪便中氨气含量,其中Ⅱ、Ⅲ、Ⅴ组与对照组相比差异显著(P<0.05),Ⅳ组与对照组相比差异极显著(P<0.01)。研究表明加入适量的水解单宁酸(1.5 kg/t)可以明显改善肉仔鸡肠道菌群和降低粪便中氨气的含量。

To study the effects of hydrolyzed tannin acid on intestinal flora and the content of NH3 in faeces of broil- ers,a total of 2000 one-day-old AA broilers were randomly divided into 5 groups with 4 replications of 100 eaeh.Hy- drolyzed tannin adding level was in diet 0%, 0.05%, 0.10%, 0.15%, 0.20% respectively.The test lasted for 42 d.The results showed that：hydrolyzed tannin acid increased the amount of beneficial bacterium and inhibited the beneficial bacterium. The effects of group Ⅲ, Ivand Vwere significantly,compared with control（P 〈 0.05）.At the same time,hydrolyzed tannin acid could decrease the content of NH3 in feaees, the effects of group Ⅱ , Ⅲ and Ⅴ were signifieantly（P 〈 0.05 ）, group Ⅳ was very significantly （P 〈 0.01）.Above all,appropriate hydrolyzed tannin acid （1.5 kg/t） could significantly improve in- testinal flora and decrease the content of NH3 in faeces of broilers.