Effects of Dietary Particulate to Ground Limestone Ratio on Laying Performance, Egg Quality, Serum Biochemical Indices and Tibia Indices of Cage-Rearing Laying Ducks

HUANG Xuan; LI Chuang; ZHANG Xu; JIANG Guitao; HU Yan; ZHOU Wangping; DAI Qiuzhong

doi:10.3969/j.issn.1006-267x.2019.11.018

2019 , Vol. 31 >Issue 11: 5039 - 5045

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.11.018

Effects of Dietary Particulate to Ground Limestone Ratio on Laying Performance, Egg Quality, Serum Biochemical Indices and Tibia Indices of Cage-Rearing Laying Ducks

HUANG Xuan ,
LI Chuang ,
ZHANG Xu ,
JIANG Guitao ,
HU Yan ,
ZHOU Wangping ,
DAI Qiuzhong

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1. Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
2. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China;
3. Hunan Engineering Research Center of Poultry Production Safety, Changsha 410128, China

Received date: 2019-04-15

Online published: 2019-11-19

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Abstract

This experiment was conducted to study the effects of dietary particulate to ground limestone ratio on laying performance, egg quality, serum biochemical indices and tibia indices of cage-rearing laying ducks. A total of 200 Linwu ducks with similar body weight at 29 weeks of age were randomly allocated to 5 groups with 5 replicates in each group and 8 ducks in each replicate. Ducks in groups Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ were fed experimental diets which contained 100% ground limestone, 25% particulate limestone+75% ground limestone, 50% particulate limestone+50% ground limestone, 75% particulate limestone+25% ground limestone and 100% particulate limestone (calcium level was 3.52% in each group), respectively. The experiment lasted for 63 days. The results showed as follows:1) the qualified egg rate of groups Ⅲ and Ⅳwas significantly higher than that of group Ⅰ (P<0.05). 2) The eggshell strength of groups Ⅲ and Ⅳ was significantly higher than that of groups Ⅰ and Ⅱ (P<0.05), and the eggshell strength of group Ⅴ was significantly higher than that of group Ⅰ (P<0.05). 3) The serum calcium content of group Ⅳ was significantly higher than that of groups Ⅰ and Ⅱ (P<0.05), and the serum alkaline phosphatase (AKP) activity of groups Ⅲ, Ⅳ and Ⅴ was significantly lower than that of groups Ⅰ and Ⅱ (P<0.05). 4) Dietary particulate to ground limestone ratio had no significant effects on tibia indices of cage-rearing laying ducks (P>0.05). In conclusion, dietary particulate to ground limestone ratio can change the qualified egg rate and eggshell strength of laying ducks, thereby affecting the calcium content and AKP activity in serum. Synthesize these indicators, the suitable dietary limestone supplemental form of cage-rearing laying ducks in peak laying period is 75% particulate limestone+25% ground limestone under the condition of ensuring consistent dietary calcium level.

Key words： ground limestone; cage-rearing laying ducks; laying performance; egg quality; tibia quality

Cite this article

HUANG Xuan , LI Chuang , ZHANG Xu , JIANG Guitao , HU Yan , ZHOU Wangping , DAI Qiuzhong . Effects of Dietary Particulate to Ground Limestone Ratio on Laying Performance, Egg Quality, Serum Biochemical Indices and Tibia Indices of Cage-Rearing Laying Ducks[J]. Chinese Journal of Animal Nutrition, 2019 , 31(11) : 5039 -5045 . DOI: 10.3969/j.issn.1006-267x.2019.11.018

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