Biopotency of methionine sources and their effects on sexual maturity of growing Japanese quail
Title:
Biopotency of methionine sources and their effects on sexual maturity of growing Japanese quail
Author:
Shim, K. F. Chen, E. V.
Appeared in:
British poultry science
Paging:
Volume 31 (1990) nr. 2 pages 273-282
Year:
1990-06
Contents:
1. Japanese quail were fed on practical diets supplemented with graded amounts of DL-methionine (dl-M), DL-methionine-sodium (DL-M-Na), DL-methionine hydroxy-analogue calcium (DL-MHA-Ca) and DL-methionine hydroxy-analogue free acid (dl-MHA-FA) on an equimolar basis. 2. By the slope ratio assay using quail growth as the criterion, it was deduced that the biological activity of DL-M-Na, DL-MHA-Ca and dl-MHA-FA was approximately 0-96, 0-72 and 0-84 that of dl-M on an equimolar basis. 3. On a weight basis of the commercial products, the efficacies of DL-M-Na, DL-MHA-Ca and dl-MHA-FA were 0-38, 0-62 and 0-74, respectively. 4. Quail fed on the diet with the highest content of methionine had greater ovary weight, oviduct weight, oviduct length and egg production.
Journal description