无抗蛋鸡日粮的研制与应用

Development and application of non-antibiotic feed for layer

试验的目的是研究益生素和酵母细胞壁不同配比浓度对蛋鸡生产性能的影响,开发无抗蛋鸡日粮。选择体重相近、健康的华裕海兰褐蛋鸡4万羽,随机分成4组,分别饲喂基础饲粮（对照组,A组）、基础饲粮＋400g/t酵母细胞壁＋50 g/t益生素（B组）、基础饲粮＋800 g/t酵母细胞壁＋100 g/t益生素（C组）、基础饲粮＋1 200 g/t酵母细胞壁＋150 g/t益生素（D组）。试验期为28~50周龄。结果表明：整个试验期各组间蛋鸡日采食量、平均蛋重没有显著差异（P〉0.05）。与A组相比,B、C和D组蛋鸡产蛋率分别提高了2.99%（P〈0.05）、5.60%（P〈0.05）和2.94%（P〈0.05）,料蛋比分别下降了1.43%（P〉0.05）、6.67%（P〈0.01）和2.38%（P〈0.05）。与B、D组相比,C组蛋鸡产蛋率分别提高了2.48%（P〉0.05）、2.52%（P〉0.05）;料蛋比下降了5.61%（P〉0.05）、4.26%（P〈0.05）。结果提示,饲粮中添加酵母细胞壁、益生素组合对蛋鸡生产性能影响明显,饲粮中添加800 g/t酵母细胞壁＋100 g/t益生素（C组）效果最佳。运用系统而综合的免疫管理措施,适宜浓度的益生素和酵母细胞壁组合有效地促进了有益菌在肠道的定殖增殖、提高了肠道的屏障功能以及增强免疫细胞的免疫活性,试验证明其可以替代蛋鸡饲料中抗生素的使用,维持蛋鸡高水平的健康状况。

The purpose of this experiment was to study the effects of different probiotics and yeast cell wall concentrations on performance of layer and develop non-antibiotic feed for layer. In the experiment, 40 000 healthy Hailan-brown laying hens with similar body weight were randomly divided into four groups, and fed basal diet（control group, A group）, basal diet ＋ 400 g/t yeast cell wall ＋50 g/t probiotics（group B）, basal diet ＋ 800 g/t yeast cell wall ＋ 100 g/t probiotics（group C）, basal diet ＋ 1 200 g/t yeast cell wall ＋150 g/t probiotics（group D）, respectively. Experiment started at age of 28 weeks and ended at the age of 50 weeks. The results showed that daily feed intake and average egg weight were not significantly different（P 0.05）between the groups throughout the test period.Compared with group A, laying rate of layers in group B、C and D was increased by 2.99%（P0.05）、5.60%（P0.05）and 2.94%（P 0.05）, feed to egg ratio was decreased by 1.43%（P0.05）, 6.67%（P0.01）and 2.38%（P0.05）, respectively. Compared with the B, D,laying rate of group C was increased by 2.48%（P 0.05）and 2.52%（P 0.05）; feed egg ratio was decreased by 5.61%（P 0.05）and4.26%（P0.05）, respectively. Results suggested that yeast cell wall and probiotics had significant effect on performance of laying hen,adding 800 g/t yeast cell wall ＋ 100 g/t probiotics（group C） to diet had best effect. Systemic and comprehensive immune management and proper concentration of probiotics and yeast cell wall in diet could effectively promote the proliferation of beneficial bacteria in gut colonization and improve intestinal barrier function and enhance immune activity of immune cells. The experiment confirms that proper concentration of probiotics and yeast cell wall can replace antibiotics for feed of hens, maintain hens in a high level of health.