Metabolizable Energy Requirement for Slowly-Growing Yellow-Feathered Male Chickens from 1 to 28 Days of Age

JIANG Shouqun, WANG Weiwei, RUAN Dong, LI Long, GOU Zhongyong, HONG Ping, JIANG Zongyong

doi:10.3969/j.issn.1006-267x.2019.03.015

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 3: 1103 - 1110

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.03.015

Molecular Nutrition

Metabolizable Energy Requirement for Slowly-Growing Yellow-Feathered Male Chickens from 1 to 28 Days of Age

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1. Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou 510640, China;
2. Academy of State Administration of Grain, Beijing 100037, China

Received date: 2018-08-16

Online published: 2019-03-18

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Abstract

This experiment was conducted to investigate the metabolizable energy requirement (MEr) for slowly-growing yellow-feathered male chickens from 1 to 28 days of age. One thousand and two hundred 1-day-old male slowly-growing yellow-feathered male chickens were allotted into 4 groups in a completely randomized design based on body weight for a 28-day study. Chickens in each group were fed diets limited containing one of four levels of dietary metabolizable energy which were 11.14, 11.56, 11.92 and 12.59 MJ/kg, respectively. The effects of dietary metabolizable energy level on growth performance, plasma biochemical indices, carcass quality, empty body composition, energy deposition rate and fat content in breast muscle were investigated. The results showed that, with the dietary metabolizable energy level increasing, the average daily metabolizable energy intake of chickens was extremely significantly increased (P<0.01) and that in each group was 206.45, 214.79, 220.77 and 235.82 kJ/d, respectively. Dietary metabolizable energy level extremely significantly affected the average daily gain (ADG), feed to gain ratio and plasma uric acid content (P<0.01), and significantly affected the fat content in breast muscle (P<0.05) of birds. In conclusion, under the condition as our experiment, the MEr for slowly-growing yellow-feathered male chickens from 1 to 28 days of age is 235.82 kJ/d according to the results of growth performance and fat content in breast muscle, and the corresponding dietary metabolizable energy level is 12.59 MJ/kg. The model for ME requirement of slowly-growing yellow-feathered male chickens from 1 to 28 days of age is as follows:MEr (kJ/d)=0.138 7BW^0.75 (g)+5.156 2ADG (g).

Key words： slowly-growing yellow-feathered male chickens; metabolizable energy; requirement; growth performance

Cite this article

JIANG Shouqun, WANG Weiwei, RUAN Dong, LI Long, GOU Zhongyong, HONG Ping, JIANG Zongyong . Metabolizable Energy Requirement for Slowly-Growing Yellow-Feathered Male Chickens from 1 to 28 Days of Age[J]. Chinese Journal of Animal Nutrition, 2019 , 31(3) : 1103 -1110 . DOI: 10.3969/j.issn.1006-267x.2019.03.015

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