Effects of Dietary Folic Acid Supplemental Level on Laying Performance, Egg Quality, Reproductive Organ and Plasma Reproductive Hormone Indices of Shanma Laying Ducks

XIA Weiguang; WANG Shenglin; CHEN Wei; RUAN Dong; WANG Shuang; FOUAD A M; LIN Yingcai; ZHENG Chuntian

doi:10.3969/j.issn.1006-267x.2016.07.007

2016 , Vol. 28 >Issue 7: 2024 - 2031

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.07.007

POULTRY NUTRITION

Effects of Dietary Folic Acid Supplemental Level on Laying Performance, Egg Quality, Reproductive Organ and Plasma Reproductive Hormone Indices of Shanma Laying Ducks

XIA Weiguang ,
WANG Shenglin ,
CHEN Wei ,
RUAN Dong ,
WANG Shuang ,
FOUAD A M ,
LIN Yingcai ,
ZHENG Chuntian

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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. Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt

Received date: 2016-01-11

Online published: 2016-07-28

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Abstract

This experiment was conducted to study the effects of dietary folic acid (FA) supplemental level on laying performance, egg quality, reproductive organ and plasma reproductive hormone indices of shanma laying ducks, and to estimate dietary FA requirement for Shanma laying ducks in laying period from 18 to 32 weeks of age. A total of 360 Shanma laying ducks at 16 weeks of age were randomly allotted to 5 groups, each with 5 replicates of 12 birds. All birds were offered a basal diet without FA supplementation for 2 weeks. Then birds were fed the experimental diets supplemented with 0, 0.5, 1.0, 2.0, 4.0 and 8.0 mg/kg FA, respectively. The experiment lasted for 15 weeks. The results showed as follows: 1) in the early laying period, peak laying period and the whole experimental period, dietary FA supplemental level had no significant effect on laying performance indices of laying ducks (P>0.05). 2) Eggshell relative weight and thickness were firstly increased and then decreased with dietary FA supplemental level increasing, and the eggshell relative weight of 1.0 mg/kg FA group was significantly higher than that of other groups (P<0.05). 3) Large yellow follicle (LYF) weight and LYF weight/ovarian weight were firstly increased and then decreased with dietary FA supplemental level increasing, and the maximal value was at the level of 4.0 mg/kg (P<0.05). 4) Plasma concentration of progesterone was firstly increased and then decreased with dietary FA supplemental level increasing, and the maximal value was at the level of 2.0 mg/kg (P<0.05). Luteinizing hormone concentration of 8.0 mg/kg FA group was significantly higher than that of other groups (P<0.05). In conclusion, FA supplementation in corn-soybean meal basal diet is beneficial to improving the development of LYF, but do not affect laying performance of Shanma laying ducks. Only considering laying performance of Shanma laying ducks, it is not necessary to supplement with FA in corn-soybean meal basal diet, but based on eggshell relative weight and thickness, the optimal FA supplementation for Shanma laying ducks in laying period from 18 to 32 weeks of age is 1.0 mg/kg.

Key words： folic acid; Shanma ducks; laying performance; egg quality; reproductive organ

Cite this article

XIA Weiguang , WANG Shenglin , CHEN Wei , RUAN Dong , WANG Shuang , FOUAD A M , LIN Yingcai , ZHENG Chuntian . Effects of Dietary Folic Acid Supplemental Level on Laying Performance, Egg Quality, Reproductive Organ and Plasma Reproductive Hormone Indices of Shanma Laying Ducks[J]. Chinese Journal of Animal Nutrition, 2016 , 28(7) : 2024 -2031 . DOI: 10.3969/j.issn.1006-267x.2016.07.007

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