Effects of Alfalfa Crude Polysaccharides on Performance, Egg Quality and Caecal Microflora Numbers of Laying Hens

WANG Jinyu, DONG Xiaofang, TONG Jianming

doi:10.3969/j.issn.1006-267x.2017.02.017

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 2: 502 - 510

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.02.017

Molecular Nutrition

Effects of Alfalfa Crude Polysaccharides on Performance, Egg Quality and Caecal Microflora Numbers of Laying Hens

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Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received date: 2016-08-01

Online published: 2017-02-17

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Abstract

This experiment was conducted to study the effects of dietary different supplemental levels of alfalfa crude polysaccharides (ACPS) on performance, egg quality and caecal microflora numbers of laying hens. Five hundred and forty 30-week-old Hy-line brown hens were randomly allocated to 6 groups with 6 replicates per group and 15 hens per replicate. Hens in control group were fed a corn-soybean meal basal diet, and those in testing groups were fed the basal diet supplemented with 250, 500, 1 000, 2 000 and 4 000 mg/kg ACPS, respectively. The experiment lasted for 144 days. The results showed as follows:1) during week 1 to 8, the laying rate of 2 000 and 4 000 mg/kg ACPS groups was significantly higher than that of the control and 250 mg/kg ACPS groups (P<0.05). During week 17 to 20, the average daily feed intake of 2 000 mg/kg ACPS group was significantly higher than that of the control and 250 mg/kg ACPS groups (P<0.05), while the feed to egg ratio of 250 mg/kg ACPS group was significantly lower than that of the control and 500 mg/kg ACPS groups (P<0.05). 2) Compared with the control group, all ACPS groups significantly improved the egg yolk color on day 144 (P<0.05), the 4 000 mg/kg ACPS group significantly decreased the Haugh unit on day 90 (P<0.05), the 2 000 and 4 000 mg/kg ACPS groups significantly decreased the egg shape index on day 60 (P<0.05), the 1 000 mg/kg ACPS group also significantly decreased the egg shape index on day 120 (P<0.05), the 250 and 1 000 mg/kg ACPS groups significantly decreased the soft shelled or cracked eggs rate during day 61 to 90 (P<0.05). 3) Compared with the control group, the 500 and 2 000 ACPS groups significantly decreased the number of Escherichia coli in cecum on day 80, while the number of Lactobacillus in cecum was significantly increased on day 80 (P<0.05), and the 4 000 mg/kg ACPS group also significantly increased the number of Lactobacillus in cecum on day 80 (P<0.05); the 1 000 mg/kg ACPS group significantly decreased the number of Salmonella in cecum on day 144 (P<0.05); the 500 and 1 000 mg/kg ACPS groups increased the number of Bifidobacterium in caecum on day 40, 80, 120 and 144, but differences between them were not significant (P>0.05). In conclusion, dietary supplemented suitable level of ACPS can enhance performance of laying hens during laying period, improve egg quality, and optimize caecal microflora structure. The appropriate supplemental level of ACPS is 500 mg/kg.

Key words： alfalfa crude polysaccharides; laying hens; performance; egg quality; caecal microflora

Cite this article

WANG Jinyu, DONG Xiaofang, TONG Jianming . Effects of Alfalfa Crude Polysaccharides on Performance, Egg Quality and Caecal Microflora Numbers of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2017 , 29(2) : 502 -510 . DOI: 10.3969/j.issn.1006-267x.2017.02.017

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