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Swine Nutrition and Feed Technology
Asian-Australasian Journal of Animal Sciences 1992;5(2): 365-368.
DOI: https://doi.org/10.5713/ajas.1992.365    Published online June 1, 1992.
Energy and protein requirements of Khaki Campbell x Thai Native laying ducks
N. Thongwittaya, I. Tasaki
Abstract
The experiment was carried out to extimate the energy and protein requirements of Khaki Campbell 횞 Thai Native laying ducks. To estimate the energy requirement, 5 experimental diets were formulated at levels of 2.70, 2.75, 2.80, 2.85 and 2.90 Mcal ME/kg. These diets were equal in ME/CP ratio (170/l). A total of 150 18-week old laying ducks were assigned to 5 energy level treatments, each comprising 3 replicates of 10 birds each, and they were fed the diets for 18 weeks. To estimate the protein requirement, 90 18-week old laying ducks were divided into 9 groups of 10 birds each, and they were assigned to 3 protein level treatments, each comprising 3 replicates. The levels of protein in the diets were 13.5%, 15.0% and 16.5%, and all diets were isocaloric (2.8 Mcal ME/kg). As a result, the 16.5% protein diet gave significantly better egg production than the 13.5% and 15.0% protein diets, however, no significant difference in egg production was found among the energy levels. Feed cost to produce 1k eggs was lower in the 2.70 Mcal and 16.5% protein diets than in the higher ME and lower protein diets.
Keywords: Energy/Protein Requirement; Laying Duck; Khaki Campbell 횞 Thai Native


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