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Digestibility and metabolizable energy content of low protein barley and maize based diets determined with commercial hybrid laying hens and a strain selected on a low protein energy diet


Digestibility and metabolizable energy content of low protein barley and maize based diets determined with commercial hybrid laying hens and a strain selected on a low protein energy diet



Swedish Journal of Agricultural Research 17(2): 93-96



Two isocaloric (11.4 MJ ME/kg) diets, based on barley-fish meal (13.4% CP) or maize-soybean meal (11.0% CP), were each fed to six laying hens of each of two commercial hybrids and one experimental strain selected for several generations on a low protein-energy diet. Feed intake and excreta outputs were recorded for 7-day periods for hens between 43-52 weeks of age. Samples of diets and excreta were analysed for dry matter, nitrogen, fat and ash; digestibilities were calculated for organic matter, crude protein (CP), crude fat, crude carbohydrates and metabolizable energy (ME) content. Digestibility coefficients for all nutrients examined were significantly higher in the maize-soybean diet than in the barley-fish meal diet. The experimental strain digested the CP of the barley-fish meal diet more efficiently than the other strains, indicated by the significant diet .times. strain interaction. The digestibility coefficient for CP and ME content of the maize-soybean meal diet agreed with the calculated values, whereas those for the barley-fish meal diet were about 2% higher and 3% lower, respectively.

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Accession: 005161288

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