Research note: effect of high ambient temperature on dietary metabolizable energy values in genetically lean and fat chickens.
Effect of high ambient temperature (32 versus 22 C) on dietary ME value was investigated in 32 genetically lean and fat 8-wk-old male chickens. Lean broilers exhibited higher AME and TME values than fat chickens. Hot climatic conditions significantly increased AME and TME values, particularly in leaner birds. Protein retention efficiency was enhanced by selection for leanness and increased with ambient temperature. Correction for nitrogen balance (AME(n) and TMEn) reduced the effect of temperature but lean genotypes still revealed higher TMEn values than fatter ones.
Geraert
P A
PA
Station de Recherches Avicoles, Institut National de la Recherche Agronomique, Nouzilly, France.
Guillaumin
S
S
Zuprizal
D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000235:genetics* / Q000378:metabolism; D004032:Diet; D004044:Dietary Proteins / Q000008:administration & dosage; D004435:Eating; D002149:Energy Intake; D004734:Energy Metabolism; D005838:Genotype; D006358:Hot Temperature; D008297:Male; D009584:Nitrogen / Q000378:metabolism
D004044:Dietary Proteins; D009584:Nitrogen