Effects of Alternation Feeding of Low and High Calcium Diets on Performance, Egg Quality and Serum Indexes of Laying Hens at Late Period of Laying

HAO Erying, CHEN Hui, WANG Dehe, HUANG Renlu, LIU Ping, DAI Zhanhui, ZHENG Lijie, ZHAO Xiaoyu, XU Lijun, MU Xiaoxu

doi:10.3969/j.issn.1006-267x.2018.04.014

2018 , Vol. 30 >Issue 4: 1311 - 1319

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.04.014

Molecular Nutrition

Effects of Alternation Feeding of Low and High Calcium Diets on Performance, Egg Quality and Serum Indexes of Laying Hens at Late Period of Laying

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1. Animal Science and Technology College of Hebei Agricultural University, Baoding 071000, China;
2. Breeding Poultry Co., Ltd. of Dawu Group, Baoding 071000, China;
3. Baoding Municipal Bureau of Agriculture, Baoding 071000, China

Received date: 2017-10-18

Online published: 2018-04-03

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Abstract

The purpose of this experiment was to study the effects of alternation feeding of high and low calcium diets on performance, egg quality and serum indexes of laying hens at late period of laying. Sixty-weight 68-week-old Dawufen No.1 hen breeders were selected and randomly divided into 2 groups with 32 birds in each group, and single cage reared in individual intelligent cage. The laying hens in control group were fed 43.3 and 86.7 g middle calcium diet (calcium content was 3.66%) at 08:00 and 14:00, respectively. The laying hens in experimental group were fed 43.3 g low calcium diet (calcium content was 2.00%) at 08:00, and they were fed 86.7 g high calcium diet (calcium content was 4.49%) at 14:00. The test period lasted for 5 weeks including 1 week for pre-test period and 4 weeks for trial period. The results showed that the average daily feed intake, average egg weight, laying rate and feed/egg in the experimental group were not significantly different from those in the control group (P>0.05), but the numerical value of laying rate in the experimental group at each week of experiment was higher than that in the control group. The eggshell thickness at the 2nd week in the experimental group was significantly higher than that in the control group (P<0.05), but the albumen height and Haugh unit at each week had no significant differences between the experimental group and the control group (P>0.05). In the control group, serum calcium content at 18:00 and 22:00 was significantly higher than that at 10:00 and 14:00 (P<0.05), and higher than that at 06:00 and 02:00 (morrow) (P>0.05). In the experiment group, serum calcium content at 22:00 was significantly higher than that at 06:00, 10:00, 18:00 and 02:00 (morrow) (P<0.01), and significantly higher than that at 14:00 and 18:00 (P<0.05). From 06:00 to 22:00, serum calcium content in the experimental group showed an increasing trend. At 22:00, serum calcium and calcitonin contents in the experimental group were significantly higher than those in the control group (P<0.05). It is concluded that alternating feeding of high and low calcium diets (high calcium diet is fed in the afternoon) can increase laying rate and the absorption and deposition of calcium for laying hens at late stage of laying, and improve the eggshell quality to a certain extent.

Key words： calcium content; laying hens; performance; egg quality; serum calcium

Cite this article

HAO Erying, CHEN Hui, WANG Dehe, HUANG Renlu, LIU Ping, DAI Zhanhui, ZHENG Lijie, ZHAO Xiaoyu, XU Lijun, MU Xiaoxu . Effects of Alternation Feeding of Low and High Calcium Diets on Performance, Egg Quality and Serum Indexes of Laying Hens at Late Period of Laying[J]. Chinese Journal of Animal Nutrition, 2018 , 30(4) : 1311 -1319 . DOI: 10.3969/j.issn.1006-267x.2018.04.014

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