Effect of Quantity and Source of Dietary Nitrogen on the Utilization of the Hydroxy Analogues of Methionine and Glycine by Chicks
- 1 May 1957
- journal article
- research article
- Published by Elsevier in Journal of Nutrition
- Vol. 62 (1), 143-150
- https://doi.org/10.1093/jn/62.1.143
Abstract
The hydroxy analogues of methionine and glycine as supplements in low-protein chick diets failed to support growth equivalent to the alpha amino compounds (DL-methionine and glycine). Additions of nitrogen in the form of urea or diammonium citrate to the MHA diets caused a marked increase in chick growth response over MHA alone. Urea, added to the sodium glycolate-supplemented diets, increased chick gains over sodium glycolate alone. Feed efficiency of chicks receiving MHA and sodium glycolate-supplemented diets was poorer than that of chicks receiving diets supplemented with DL-methionine and glycine. Additions of urea or diammonium citrate to MHA or sodium glycolate-supplemented diets improved feed efficiency. Chicks appeared to be more tolerant of dietary urea and diammonium citrate in the presence of MHA than in the presence of DL-methionine. The increased chick growth response to dietary urea or diammonium citrate is believed to be the first such observation in chick experiments.Keywords
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