Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 5: 1105 - 1112

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.05.028

Short Communications

Effects of Dietary Zinc Level on Growth Performance, Serum Biochemical Parameters and Hormone Contents of Geese

  • CHEN Miaolu ,
  • WANG Baowei ,
  • ZHANG Ming ,
  • YUE Bin ,
  • GE Wenhua ,
  • WANG Di ,
  • WANG Jiao ,
  • MENG Lingfeng
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  • Institute of High Quality Waterfowl, Qingdao Agricultural University, Qingdao 266109, China

Received date: 2012-11-02

  Online published: 2013-04-12

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Abstract

This experiment was conducted to study the effects of dietary zinc level on growth performance, serum biochemical parameters and hormone contents of geese, and to estimate the dietary zinc optimal level of geese. Three hundred and sixty 1-day-old and three hundred and sixty 29-day-old Qingnonghui geese were randomly selected and divided into 6 groups with 6 replicates per group and 10 geese per replicate. Dietary zinc levels in each group were 31.28, 81.28, 131.28, 181.28, 231.28 and 281.28 mg/kg at the age of 1 to 4 weeks and 27.46, 77.46, 127.46, 177.46, 227.46 and 277.46 mg/kg at the age of 5 to 15 weeks, respectively. The experiment lasted for 15 weeks. The results showed as follows: 1) according to the curve equation, at the age of 1 to 4 weeks, when the dietary zinc level was 112.51 mg/kg, the average daily gain (ADG) reached the highest, when the dietary zinc level was 106.05 mg/kg, the feed to gain (F/G) reached lowest. At the age of 5 to 15 weeks, when the dietary zinc level was 108.09 mg/kg, the ADG reached the highest, when the dietary zinc level was 101.69 mg/kg, the F/G reached lowest. 2) At 4 weeks of age, dietary zinc level of 131.28 mg/kg significantly increased the serum total protein and zinc contents and serum alkaline phosphatese (AKP) activity (P<0.05). At 15 weeks of age, dietary zinc levels of 127.46 mg/kg significantly increased serum AKP activity and zinc content (P<0.01). 3) According to the curve equation, at the age of 4 weeks ,when the dietary level of zinc was 161.16 mg/kg, the serum estradiol (E2) content of geese reached the highest; when the dietary level of zinc was 167.92 mg/kg, the serum growth hormone content of geese reached the highest. At the age of 15 weeks, when the dietary level of zinc was 132.41 mg/kg, the serum growth hormone content of geese reached the highest. In conclusion, zinc has important influence on the growth performance, serum total protein content, serum AKP activity and serum hormonal contents of geese. The dietary zinc optimal level of geese is 106.05 mg/kg at the age of 1 to 4 weeks and 101.69 mg/kg at the age of 5 to 15 weeks.

Key words： zinc; geese; growth performance; hormone; optimal level

Cite this article

CHEN Miaolu , WANG Baowei , ZHANG Ming , YUE Bin , GE Wenhua , WANG Di , WANG Jiao , MENG Lingfeng . Effects of Dietary Zinc Level on Growth Performance, Serum Biochemical Parameters and Hormone Contents of Geese[J]. Chinese Journal of Animal Nutrition, 2013 , 25(5) : 1105 -1112 . DOI: 10.3969/j.issn.1006-267x.2013.05.028

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