乳酸菌对蛋鸡产蛋后期生产性能、蛋品质及发酵粪中NH_3、H_2S浓度的影响

Effects of Lactobacillus on production performance,egg quality,fecal emission of ammonia and sulfureted hydrogen of layers at the latter laying period

本试验旨在研究日粮中添喂不同水平乳酸菌对蛋鸡产蛋后期生产性能、蛋品质及发酵粪中氨气(NH_3)、硫化氢(H_2S)浓度的影响。选取60周龄京红蛋鸡360只,随机分为4组,每组6个重复,每个重复15只。对照组、试验Ⅰ组、Ⅱ组和Ⅲ组在饲喂相同基础日粮的条件下分别添喂0、50、100、150 mg/kg乳酸菌。结果表明:试验Ⅲ组平均日产蛋重、平均蛋重、产蛋率和商品蛋合格率均极显著高于对照组17.23%、1.07%、15.07%和1.21%(P<0.01),料蛋比较对照组降低了14.46%(P<0.01);试验Ⅱ组蛋黄重量显著提高(P<0.05),试验Ⅲ组蛋壳重量较对照组提高了14.56%(P<0.01);试验Ⅲ组粪便含水率极显著低于对照组3.39%(P<0.01),试验Ⅲ组发酵粪中NH_3和H_2S浓度极显著低于对照组38.76%和20.17%(P<0.01)。综上所述,在蛋鸡产蛋后期日粮中添喂150 mg/kg乳酸菌可以明显提高其产蛋性能,改善蛋品质,降低发酵粪中NH_3和H_2S浓度。

The experiment was conducted to study the effects of Lactobacillus on production performance, egg quality, fecal emission of ammonia and sulfureted hydrogen of layers at the later laying period.A total of 360 layers with 60- weeks- old were randomly divided into 4 groups with 6 replications and 15 layers per replication.They were fed the same basal diet with 0,50,100,150 mg/kg Lactobacillus .The total duration of the experiment was 60 days, the first 6 days of experiment was preliminary period and the formal experiment lasted for 54 days.The results showed that dietary supplementation different levels of Lactobacillus could improve the production performance of layers at the later laying period.Compared with control group,average daily egg yield, average egg weight, laying rate and commodity qualified egg rate of trial group Ⅲ were ex-tremely significant increased by 17.23%,1.07%,15.07% and 1.21% （P 〈 0.01） , feed egg ratio of trial group Ⅲ was decreased by 14.46%（P 〈0.01）;the yolk weight of trial group Ⅲ was significantly increased （P 〈 0.05） , the eggshell weight of trial group Ⅲ was significantly increased by 14.56%; the fecal moisture percentage of trial group Ⅲ was significantly decreased by 3.39%（P 〈0.01）, fecal emission of sulfureted hydrogen and ammonia were decreased by 38.76% and 20.17% （P 〈 0.01）. In conclusion,dietary supplementation with 150 mg/kg Lactobacillus could improve production performance, egg quality, re- duce fecal emission of ammonia and sulfureted hydrogen of layers at the later laying period.