ORIGINAL PAPER
A note on the performance and nitrogen output of broiler chickens fed diets with and without meat-and-bone meal formulated to total or digestible amino acid requirements
W. Szczurek 1  
 
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Research Institute of Animal Production, Department of Animal Nutrition, 32-083 Balice, Poland
CORRESPONDING AUTHOR
W. Szczurek   

Research Institute of Animal Production, Department of Animal Nutrition, 32-083 Balice, Poland
Publication date: 2003-10-28
 
J. Anim. Feed Sci. 2003;12(4):813–819
 
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ABSTRACT
The aim of the experiment was to determine the potential for the improvement of growth performance and reduction of nitrogen excretion in chickens by formulating practical diets, with or without meat-and-bone meal, on a digestible amino acid basis. From days 22 to 42 chickens were fed isoenergetic diets based either on maize, wheat and soyabean meal and containing 8% meat-and-bone meal (M) or on maize, soyabean meal, rapeseed meal and faba beans (P). Diets were formulated on a total (Mt and Pt) or digestible (Md and Pd) amino acid basis. No significant differences in performance indices between chickens fed M diets and those fed P diets were obtained. Mean daily N output on diets containing exclusively vegetable ingredients was significantly lower than on M diets. A similar trend was observed for relative N output (% of N intake). Body weight gain, feed conversion ratio, and European Performance Index value of chickens fed diets formulated on a digestible amino acid basis were superior (P ≤ 0.05) to those of chickens fed diets based on total amino acids. There was a tendency for both measures of N output to decrease when diets were formulated on a digestible amino acid basis.
 
CITATIONS (1):
1.
Effect of Dietary Protein Level and Type of Feed Formulation on Nitrogen Excretion of Broilers
Reza Salahi Moghaddam, Shahriar Maghsoudlou, Yosef Mostafalou, Mohammad Hosein Shahir, Javad Bayat Koohsar
Research on Animal Production
 
ISSN:1230-1388