Using a feed-grade zinc propionate to achieve molt induction in laying hens and retain postmolt production and quality
- Authors
- Park, S.Y.; Kim, W.K.; Birkhold, S.G.; Kubena, L.F.; Nisbet, D.J.; Ricke, S.C.
- Issue Date
- Nov-2004
- Keywords
- Egg production; Egg quality; Induced molt; Organs; Zn propionate
- Citation
- Biological Trace Element Research, v.101, no.2, pp 165 - 179
- Pages
- 15
- Journal Title
- Biological Trace Element Research
- Volume
- 101
- Number
- 2
- Start Page
- 165
- End Page
- 179
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/65547
- DOI
- 10.1385/BTER:101:2:165
- ISSN
- 0163-4984
1559-0720
- Abstract
- A commercial-feed-grade form of zinc propionate was examined as a potential feed amendment at a concentration of 1% zinc to induce molt in 90-wk-old hens. Dietary treatments consisted of 4 treatment groups of 28 birds each randomly assigned to either (1) molted conventionally by feed withdrawal, (2) 1% zinc as Zn acetate, (3) 1% zinc as Zn propionate, or (4) nonmolted control for 9 d. Ovary weights of hens fed Zn acetate or Zn propionate were not significantly different from each other, but hens fed Zn acetate or Zn propionate were significantly (p<0.05) lighter than the ovary weight of nonmolted control hens. Zinc concentrations in the kidney and liver were significantly (p<0.05) increased in both Zn acetate- and Zn propionate-molted hens when compared to either nonmolted control-fed hens or feed-withdrawal molted hens. Over the entire 3-mo postmolt period, there were no significant differences in interior or exterior egg qualities among the four treatments. Egg production of hens fed Zn acetate was significantly lower than feed-withdrawal hens, Zn propionate-fed hens, or nonmolted control hens (p<0.05). The data of the current study demonstrated that feeding a feed grade of Zn propionate (1% Zn)-supplemented diet can induce molt and retain postmolt egg quality and production comparable to hens molted by feed withdrawal.
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