Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Egg Quality and Serum Biochemical, Antioxidant and Hormone Indices of Breeding Geese during Laying Period

SHI Jing, WANG Baowei, GE Wenhua, ZHANG Ming'ai, YUE Bin, DAI Guotao, WANG Hefei, SUI Fuliang

doi:10.3969/j.issn.1006-267x.2019.05.021

2019 , Vol. 31 >Issue 5: 2144 - 2151

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.05.021

Molecular Nutrition

Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Egg Quality and Serum Biochemical, Antioxidant and Hormone Indices of Breeding Geese during Laying Period

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Nutrition and Feed Laboratory of China Agriculture Research System, Institute of High Quality Waterfowl, Qingdao Agricultural University, Qingdao 266109, China

Received date: 2018-10-15

Online published: 2019-05-15

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Abstract

This experiment was conducted to study the effects of dietary zinc supplemental level on reproductive performance, egg quality and serum biochemical, antioxidant and hormone indices of breeding geese during laying period. A total of 120 thirty-four-week-old breeding geese with the similar body condition were randomly divided into 6 groups with 4 replicates per group and 5 geese per replicate (1 male 4 female). Geese in the 6 groups (groups Ⅰ to Ⅵ) were fed experimental diets supplemented with 0, 25, 50, 75, 100 and 125 mg/kg. The pre-experimental period lasted for 1 week, and the experimental period lasted for 10 weeks. The results showed as follows: 1) the hatching egg qualified rate of groups Ⅲ, Ⅳ and Ⅴ was significantly higher than that of group Ⅰ (P<0.05), the hatching egg fertilization rate of groups Ⅳ and Ⅴ was significantly higher than that of groups Ⅰ, Ⅱ and Ⅵ (P<0.05 or P<0.01), the hatching egg hatching rate of groups Ⅳ and Ⅴ was significantly higher than that of other groups (P<0.05 or P<0.01), the healthy rate of groups Ⅲ and Ⅳ was significantly higher than that of other groups (P<0.05 or P<0.01). 2) Dietary zinc supplemental level had no significant effects on egg weight, egg shape index, egg proportion, eggshell strength, eggshell thickness, yolk ratio and protein height (P>0.05). The yolk color of group Ⅲ was the highest, and significantly higher than that of group Ⅰ (P<0.05); the Haugh unit of group Ⅳ was the highest, and significantly higher than that of groups Ⅰ, Ⅱ and Ⅵ (P<0.05). 3) Dietary zinc supplemental level had no significant effects on serum albumin content and glutamic oxaloacetic transaminase activity (P>0.05). The serum total protein content of group Ⅰ was significantly lower than that of other groups (P<0.05), the serum alkaline phosphatase activity of group Ⅲ was significantly higher than that of groups Ⅰ, Ⅱ and Ⅵ (P<0.05). 4) Dietary zinc supplemental level had no significant effects on serum malondialdehyde content and total superoxide dismutase and glutathione peroxidase activities (P>0.05). The serum total antioxidant capacity of groups Ⅲ and Ⅳ was significantly higher than that of group Ⅵ (P<0.05). 5) Dietary zinc supplemental level had no significant effects on the contents of insulin-like growth factor-Ⅰ, estradiol and testosterone in serum(P>0.05). The serum growth hormone content of group Ⅳ was the highest, and significantly higher than that of groups Ⅰ, Ⅱ and Ⅵ (P<0.05). In conclusion, dietary suitable zinc supplemental level has effects on reproductive performance, serum indices, yolk color and Haugh unit of breeding geese during laying period, it is suggested that the dietary zinc supplemental level of breeding geese during laying period is 65 to 70 mg/kg.

Key words： breeding geese; laying period; zinc; reproductive performance; egg quality; serum indices

Cite this article

SHI Jing, WANG Baowei, GE Wenhua, ZHANG Ming'ai, YUE Bin, DAI Guotao, WANG Hefei, SUI Fuliang . Effects of Dietary Zinc Supplemental Level on Reproductive Performance, Egg Quality and Serum Biochemical, Antioxidant and Hormone Indices of Breeding Geese during Laying Period[J]. Chinese Journal of Animal Nutrition, 2019 , 31(5) : 2144 -2151 . DOI: 10.3969/j.issn.1006-267x.2019.05.021

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