Premium
Responses of young chicks to amino acid supplementation of methanol‐grown dried microbial cells
Author(s) -
Felix D'Mello J. P.
Publication year - 1978
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740290508
Subject(s) - methionine , food science , lysine , composition (language) , arginine , amino acid , chemistry , methanol , feed conversion ratio , zoology , biology , biochemistry , body weight , organic chemistry , endocrinology , philosophy , linguistics
Two experiments have been conducted to examine the effects on chick growth and carcass composition of amino acid additions to diets containing spray‐dried or flash‐dried forms of methanol‐grown microbial cells (S‐DMC and F‐DMC respectively). The spray‐dried form was an early development product. An additional factor was the level of total nitrogen (N) in control diets containing soyabean (SBM) and in experimental diets containing 100 g S‐DMC or 150 g F‐DMC kg −1 diet. In the first experiment, a diet containing S‐DMC supported less growth than the control SBM diet containing equivalent concentrations of total N (39 g kg −1 DM) and of the sulphur containing amino acids. Supplementation of S‐DMC diets containing 36 and 32 g N kg −1 DM with methionine had no substantial effect on growth or on carcass composition. In the second experiment, methionine supplemented SBM and F‐DMC diets containing 43 g N kg −1 DM elicited similar growth performance and efficiency of food conversion. However, the feeding of basal SBM and F‐DMC diets containing sub‐optimal concentrations of total N (35 and 36 g N kg −1 DM respectively) resulted in inferior utilisation of the F‐DMC diet, this effect being only partially alleviated by combined dietary supplements of arginine, lysine and methionine.