Effects of Non-Fasting Method Moulting on Performance, Egg Quality, Follicle Number and Reproductive Hormones of Laying Hens

LEI Meng; HUANG Chenxuan; HAO Erying; CHEN Yifan; WANG Dehe; SHI Lei; YANG Yawei; LI Feiyu; CHEN Hui; LIU Yajuan

doi:10.3969/j.issn.1006-267x.2022.11.022

2022 , Vol. 34 >Issue 11: 7013 - 7023

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.11.022

RESEARCH PAPER

Effects of Non-Fasting Method Moulting on Performance, Egg Quality, Follicle Number and Reproductive Hormones of Laying Hens

LEI Meng ,
HUANG Chenxuan ,
HAO Erying ,
CHEN Yifan ,
WANG Dehe ,
SHI Lei ,
YANG Yawei ,
LI Feiyu ,
CHEN Hui ,
LIU Yajuan

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1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
2. Mountain Research Institute, Hebei Agricultural University, Baoding 071000, China;
3. Yangling Hongyan Moulting Research Institute, Yangling 712100, China;
4. Regional Agricultural and Animal Husbandry Technology Extension Station in Dian Town, Jiaxian County, Shaanxi Province, Jiaxian 719208, China

Received date: 2022-04-06

Online published: 2022-11-14

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Abstract

The purpose of this experiment was to study the effects of non-fasting method moulting on the performance, egg quality, follicle number and reproductive hormones of laying hens. A total of 180 healthy Dawu Jinfeng laying hens with similar body weight and basically the same egg production rate were randomly divided into 3 groups with 5 replicates per group and 12 hens per replicate. The experimental group (non-fasting group) used the non-fasting method to moult the laying hens, the negative control group did not undergo centralized moulting, and the positive control group (fasting group) used the fasting method to moult. The results showed as follows:1) the laying hens in the non-fasting group stopped laying eggs on the 16th day, the body weight decreased to the standard range (25% to 35%) on the 40th day, and began to lay eggs after 14 days of returning to the basal diet. The egg production rate on the 20th day was 48.8%, and on the 29th day, the egg production rate was more than 85%, and there was no death phenomenon in the whole test period. 2) During the peak period of secondary egg production after moulting, the eggshell strength, protein height and Haugh unit in the non-fasting group were not significantly different from those in the fasting group (P>0.05), but were significantly higher than those in the negative control group (P<0.05). 3) During the moulting period, the numbers of preovulatory follicles (PF), small yellow follicles (SYF) and large white follicles (LWF) in the non-fasting group were significantly lower than those in the negative control group (P<0.05); after moulting, the number of follicles increased gradually, and there was no significant difference among the three groups at the peak of secondary egg production (P>0.05). 4) After moulting, the contents of serum follicle-stimulating hormone (FSH), luteinizing hormone (LH), estrogen (E) and progesterone (Prog) in the non-fasting group were significantly higher than those in the negative control group (P<0.05), but there were no significant differences with the fasting group (P>0.05). It can be seen that the non-fasting method moulting can stimulate the ovarian potential of later laying hens, improve performance and egg quality, and reduce mortality. Replacing the fasting method moulting in production, non-fasting method moulting can improve production efficiency on the basis of ensuring animal welfare, and it is of great significance to the production of laying hens.

Key words： non-fasting method; fasting method; laying hens; performance; egg quality; follicle number; reproductive hormone

Cite this article

LEI Meng , HUANG Chenxuan , HAO Erying , CHEN Yifan , WANG Dehe , SHI Lei , YANG Yawei , LI Feiyu , CHEN Hui , LIU Yajuan . Effects of Non-Fasting Method Moulting on Performance, Egg Quality, Follicle Number and Reproductive Hormones of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2022 , 34(11) : 7013 -7023 . DOI: 10.3969/j.issn.1006-267x.2022.11.022

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