Effects of Dietary Manganese Supplemental Level on Reproductive Performance, Egg Quality, Serum Reproductive Hormone and Antioxidant Indices of Breeding Geese during Laying Period
WANG Hefei1, LI Wenli1, SUI Fuliang1, DAI Guotao2, SHI Jing2, WANG Baowei2
1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
2. Nutrition and Feed Laboratory of China Agriculture Research System, Institute of High Quality Waterfowl, Qingdao Agricultural University, Qingdao 266109, China
Abstract：This experiment was conducted to study the effects of dietary manganese supplemental level on reproductive performance, egg quality, serum reproductive hormone and antioxidant 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 and 4 female). Geese in the group Ⅰ (control group) were fed a basal diet (manganese content was 36.40 mg/kg), and the others in the experimental groups (groups Ⅱ to Ⅵ) were fed basal diets supplemented with 20, 40, 60, 80, 100 mg/kg manganese, respectively. The experiment lasted for 10 weeks. The results showed as follows:1) the laying rate of group Ⅲ was significantly higher than that of groups Ⅰ, Ⅱ Ⅴ and Ⅵ (P<0.05 or P<0.01), the hatching egg qualified rate of groups Ⅱ and Ⅲ was significantly higher than that of groups Ⅰ, Ⅴ and Ⅵ (P<0.05), the hatching egg fertilization rate and hatching egg hatching rate of group Ⅲ were significantly lower than those of other groups (P<0.05 or P<0.01), and the healthy rate of group Ⅲ was significantly higher than that of groups Ⅰ, Ⅳ Ⅴ and Ⅵ (P<0.05 or P<0.01). 2) The eggshell strength of group Ⅲ was significantly higher than that of other groups (P<0.05 or P<0.01), and the eggshell thickness of group Ⅲ was significantly higher than that of groups Ⅰ, Ⅱ Ⅴ and Ⅵ (P<0.05 or P<0.01). 3) The serum total antioxidant capacity of groups Ⅲ and Ⅳ was significantly higher than that of group Ⅵ (P<0.05), and the serum malondialdehyde content of group Ⅲ was significantly lower than that of groups Ⅰ, Ⅱ and Ⅵ (P<0.05 or P<0.01). 4) The serum follicle stimulating hormone content of groups Ⅱ and Ⅲ was significantly higher than that of group Ⅵ (P<0.05). 5) Using the hatching egg qualified rate, hatching egg fertilization rate and healthy rate as indices, according to the regression equation of the quadratic curve model, the hatching egg qualified rate got the highest when dietary manganese supplemental level was 32.91 mg/kg, the hatching egg fertilization rate got the highest when dietary manganese supplemental level was 38.28 mg/kg, and the healthy rate got the highest when dietary manganese supplemental level was 24.27 mg/kg. In conclusion, dietary suitable manganese supplemental level can improve the reproductive performance, eggshell thickness, eggshell strength, serum total antioxidant capacity and follicle stimulating hormone content of breeding geese during laying period, decrease the serum malondialdehyde content. It is suggested that the dietary manganese supplemental level of breeding geese during laying period is 24.27 to 32.91 mg/kg (dietary manganese content is 60.67 to 69.31 mg/kg).
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WANG Hefei, LI Wenli, SUI Fuliang, DAI Guotao, SHI Jing, WANG Baowei. Effects of Dietary Manganese Supplemental Level on Reproductive Performance, Egg Quality, Serum Reproductive Hormone and Antioxidant Indices of Breeding Geese during Laying Period. Chinese Journal of Animal Nutrition, 2019, 31(7): 3095-3102.
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