Effects of Different Sources and Levels of Vitamin D3 on Performance, Eggshell Quality and Tibial Quality of Laying Hens

YANG Tao; GAN Yuening; SONG Zhifang; ZHAO Tingting; GONG Yuesheng

doi:10.3969/j.issn.1006-267x.2014.03.015

2014 , Vol. 26 >Issue 3: 659 - 666

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.03.015

Poultry Nutrition

Effects of Different Sources and Levels of Vitamin D₃ on Performance, Eggshell Quality and Tibial Quality of Laying Hens

YANG Tao ,
GAN Yuening ,
SONG Zhifang ,
ZHAO Tingting ,
GONG Yuesheng

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College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China

Received date: 2013-10-08

Online published: 2014-03-04

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Abstract

This experiment was conducted to investigate the effects of different sources and levels of vitamin D₃ on performance, eggshell quality and tibial quality of laying hens. Three hundred and twenty 21-week-old healthy Nick laying hens with similar body weight were randomly allocated to 8 groups with 4 replicates per group and 10 hens per replicate. Test laying hens were all fed corn-soybean meal type basal diet. The laying hens in groups 1 to 4 were fed the basal diet supplemented with 100, 300, 900 and 2 700 IU/kg ordinary vitamin D₃ (OVD₃), respectively, and the laying hens in groups 5 to 8 were fed the basal diet supplemented with 100, 300, 900 and 2 700 IU/kg nano vitamin D₃ (NVD₃), respectively. The pre-feeding period lasted for 1 week, and the experimental period lasted for 18 weeks. The results showed as follows: 1) the ratio of soft and broken egg of laying hens in NVD₃ group was significantly lower than that in OVD₃ group (P<0.05). With the increase of vitamin D₃ level, the ratio of soft and broken egg was significantly decreased (P<0.05). 2) Vitamin D₃ source and level had no significant effects on the indices of egg quality of laying hens (P>0.05). 3) The tibial strength of laying hens in NVD₃ group was significantly higher than that in OVD₃ group (P<0.05), while the content of tibial phorsphorus in OVD₃ group was significantly higher than that in NVD₃ group (P<0.05). The tibial strength showed a increase trend with the vitamin D₃ level increasing, and that in 100 IU/kg group was significantly lower than that in 900 and 2 700 IU/kg groups (P<0.05). 4) There were no significant interactions between vitamin D₃ source and level in the performance, egg quality and tibial quality (P>0.05). The results indicate that NVD₃ can replace OVD₃ as a vitamin D₃ source in diets of laying hens, and its effect on performance and tibial quality is better than OVD₃. Combining with performance, egg quality and tibial quality, the suitable dietary vitamin D₃ level of laying hens is in the range of 900 to 2 700 IU/kg.

Key words： nano; vitamin D₃; laying hens; performance; egg quality; tibial quality

Cite this article

YANG Tao , GAN Yuening , SONG Zhifang , ZHAO Tingting , GONG Yuesheng . Effects of Different Sources and Levels of Vitamin D₃ on Performance, Eggshell Quality and Tibial Quality of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2014 , 26(3) : 659 -666 . DOI: 10.3969/j.issn.1006-267x.2014.03.015

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