Effects of Dietary Niacin Supplemental Level on Laying Performance, Egg Quality and Plasma Biochemical Indexes of Ducks during the Early Laying Period

WANG Shuang; ZHANG Hanxing; RUAN Dong; CHEN Wei; LIN Yingcai

doi:10.3969/j.issn.1006-267x.2014.07.012

2014 , Vol. 26 >Issue 7: 1807 - 1813

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.07.012

Poultry Nutrition

Effects of Dietary Niacin Supplemental Level on Laying Performance, Egg Quality and Plasma Biochemical Indexes of Ducks during the Early Laying Period

WANG Shuang ,
ZHANG Hanxing ,
RUAN Dong ,
CHEN Wei ,
LIN Yingcai

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State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Science, Guangzhou 510640, China

Received date: 2014-01-29

Online published: 2014-07-01

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Abstract

This experiment was conducted to study the effects of dietary niacin supplemental level on laying performance, egg quality and plasma biochemical indexes of ducks during the early laying period. One thousand and fifty healthy Fujian Longyan ducks with the age of 105 days were randomly allotted into 7 treatments with 6 replicates per treatment and 25 ducks per replicate. Ducks in the 7 treatments were fed the basal diets supplemented with 0, 15, 30, 45, 60, 75 and 90 mg/kg niacin, respectively. The experiment lasted for 28 days. The results showed as follows: 1) dietary niacin supplemental level had no significant effects on laying performance of ducks during the early laying period (P>0.05), when dietary niacin supplemental level was 15 mg/kg, the laying rate and daily egg weight got the maximal value. 2) When dietary niacin supplemental levels were 15, 45 and 60 mg/kg, the yolk color had a increased tendency (P>0.05), however, when dietary niacin supplemental levels were 75 and 60 mg/kg, it significantly decreased (P<0.05). The eggshell thickness was significantly increased with dietary niacin supplemental level increasing (P<0.05). 3) The contents of triglyceride, cholesterol and low density lipoprotein-cholesterol in plasma were significantly decreased with dietary niacin supplemental level increasing (P<0.05); the plasma high density lipoprotein-cholesterol content was significantly increased with dietary niacin supplemental level increasing (P<0.05), when dietary niacin supplemental level was 90 mg/kg, it significantly decreased (P<0.05). In conclusion, the suggested dietary niacin supplemental level is 15 mg/kg in the corn-soybean diet of ducks during the early laying period, which means dietary total niacin level is 47 mg/kg. Dietary niacin level regulates the lipids metabolism in dose-dependent manner.

Key words： niacin; laying performance; egg quality; lipids metabolism

Cite this article

WANG Shuang , ZHANG Hanxing , RUAN Dong , CHEN Wei , LIN Yingcai . Effects of Dietary Niacin Supplemental Level on Laying Performance, Egg Quality and Plasma Biochemical Indexes of Ducks during the Early Laying Period[J]. Chinese Journal of Animal Nutrition, 2014 , 26(7) : 1807 -1813 . DOI: 10.3969/j.issn.1006-267x.2014.07.012

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