Effects of Dietary Crude Protein Level on Reproductive Performance, Organ Indexes and Serum Biochemical Parameters for Newborn Chicks of Jining Bairi Chickens

YIN Ruoxin; ZHANG Shuai; ZHANG Qian; SHI Tianhong; CAO Bingjian; HU Xiyi; DING Xiangwen; SU Pengcheng; SONG Zhigang

doi:10.3969/j.issn.1006-267x.2016.12.010

2016 , Vol. 28 >Issue 12: 3784 - 3791

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.12.010

Molecular Nutrition

Effects of Dietary Crude Protein Level on Reproductive Performance, Organ Indexes and Serum Biochemical Parameters for Newborn Chicks of Jining Bairi Chickens

YIN Ruoxin ,
ZHANG Shuai ,
ZHANG Qian ,
SHI Tianhong ,
CAO Bingjian ,
HU Xiyi ,
DING Xiangwen ,
SU Pengcheng ,
SONG Zhigang

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1. Poultry Institute, Shandong Academy of Agricultural Science, Jin'an 250023, China;
2. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
3. Huangdao Entry-Exit Inspection and Quarantine Bureau, Qingdao 266555, China

Received date: 2016-06-13

Online published: 2016-12-17

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Abstract

This experiment was conducted to study the effects of dietary crude protein level on reproductive performance and organ indexes, serum biochemical parameters for newborn chicks of Jining Bairi chickens, and to measure the optimal protein requirement of Jining Bairi chickens from 41 to 48 weeks of age. A single-factor completely randomized experiment design was applied, and a total of 525 healthy 40-week-old Jining Bairi laying hens with similar weight and laying rate (P>0.05) were randomly allocated into 5 groups with 5 replicates per group and 21 chickens per replicate. The crude protein levels of the experimental diets were 13%, 14%, 15%, 16% and 17%, respectively. The pretest period lasted for 7 days and the experiment lasted for 56 days. The results showed as follows:1) dietary crude protein level had an extremely significant effect on average daily crude protein intake (ADCPI) (P<0.01), and the ADCPI was increased with dietary crude protein level increasing. 2) Dietary crude protein level had significant effects on total egg number, hatchable egg number and hatched chick number (P<0.05 or P<0.01). 3) Breed dietary crude protein level had a significant effect on heart index of newborn chicks hatched at the age of 44 weeks (P<0.05). Breed dietary crude protein level had a significant effect on small intestine index of newborn chicks hatched at the age of 48 weeks (P<0.05), and had extremely significantly effects on liver index and serum uric acid content of newborn chicks hatched at the age of 48 weeks (P<0.01). In conclusion, the suitable dietary crude protein level for the breed optimal reproductive performance of Jining Bairi laying hens from 41 to 48 weeks of age is 14.81%.

Key words： crude protein level; Jining Bairi chickens; reproductive performance; newborn chicks

Cite this article

YIN Ruoxin , ZHANG Shuai , ZHANG Qian , SHI Tianhong , CAO Bingjian , HU Xiyi , DING Xiangwen , SU Pengcheng , SONG Zhigang . Effects of Dietary Crude Protein Level on Reproductive Performance, Organ Indexes and Serum Biochemical Parameters for Newborn Chicks of Jining Bairi Chickens[J]. Chinese Journal of Animal Nutrition, 2016 , 28(12) : 3784 -3791 . DOI: 10.3969/j.issn.1006-267x.2016.12.010

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