Dietary Sulphur Amino Acids Requirement of Jinghong Commercial Layers from 7 to 12 Weeks of Age

SUO Feiya, LIANG Zhongjun, MA Qiugang, ZHANG Jianyun, ZHAO Lihong, JI Cheng

doi:10.3969/j.issn.1006-267x.2018.02.019

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 2: 553 - 559

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.02.019

Molecular Nutrition

Dietary Sulphur Amino Acids Requirement of Jinghong Commercial Layers from 7 to 12 Weeks of Age

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State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2017-08-07

Online published: 2018-02-02

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Abstract

This experiment was conducted to explore the effects of different sulphur amino acid levels on growth performance and serum biochemical indices of Jinghong commercial layers from 7 to 12 weeks of age and to evaluate the dietary sulphur amino acids requirement for them. A total of 750 Jinghong layers aged of 6 weeks with similar body weight and tibia length were randomly divided into 5 groups with 5 replicates per group and 30 hens per replicate. Dietary sulphur amino acid level was 0.42% in a basal diet of control group (group A), and the same amount of bentonite in the basal diet was replaced with 0.08%, 0.16%, 0.24% and 0.32% methionine which made the levels of sulfur amino acids were 0.50%, 0.58%, 0.66% and 0.74% in groups B, C, D and E, respectively. The feeding trial lasted 6 weeks. The results showed as follows:1) the final body weight and average daily gain of hens in 0.58%, 0.66%, 0.74% sulfur amino acid groups were significantly higher than those in 0.42% and 0.50% sulfur amino acid groups (P<0.05). The ratio of feed to gain of hens in 0.66% sulfur amino acid group was significantly lower than that in 0.50% sulfur amino acid group (P<0.05), and the contents of total protein and globulin were significantly higher than those in the other experimental groups (P<0.05). 2) According to one-slope nonlinear broken-line regression analysis based on final body weight and average daily gain, the sulphur amino acid requirement of Jinghong commercial layers from 7 to 12 weeks of age was 0.62%. In conclusion, the sulphur amino acid requirement of Jinghong commercial layers from 7 to 12 weeks of age is recommended for 0.62% to 0.66%.

Key words： Jinghong commercial layers; sulphur amino acids; growth performance; serum biochemical indices; requirement

Cite this article

SUO Feiya, LIANG Zhongjun, MA Qiugang, ZHANG Jianyun, ZHAO Lihong, JI Cheng . Dietary Sulphur Amino Acids Requirement of Jinghong Commercial Layers from 7 to 12 Weeks of Age[J]. Chinese Journal of Animal Nutrition, 2018 , 30(2) : 553 -559 . DOI: 10.3969/j.issn.1006-267x.2018.02.019

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