A comparison of total and digestible amino acids in diets for broilers and layers

摘要: Eleven samples of food ingredients were analysed for their total and true digestible amino acid content, apparent metabolisable energy other components. Large batches these retained st broiler a layer experiment. Four diets formulated at 0.97 0.90 requirements egg production using the ingredients. Eight also from 1.0 to 0.91 in starter finisher diets. Proximate analyses AME values within normal range 11 foodstuffs. Digestibility acids was high with very few exceptions, e.g. cottonseed meal, meat bone meal. Diets on or basis gave no differences parameters effect level inclusion. However, main effects showed that compared better growth rate feed conversion efficiency broilers. It concluded nutrient specifications layers broilers are not sufficiently precise be able differentiate between 1.97 requirement growth. The use may justified diet formulations only when unusual protein concentrates low digestibility used large amounts. (C) 1999 Elsevier Science B.V. All rights reserved.