Effects of aldehyde treatment of soybean meal on in vitro ammonia release, solubility and lamb performance
Peter, A.P.; Hatfield, E.E.; Owens, F.N.; Garrigus, U.S.
Journal of Nutrition 101(5): 605-611
1971
ISSN/ISBN: 0022-3166 PMID: 5103728 Document Number: 33752
Solvent-extracted soya bean meal was treated with different concentrations of acetaldehyde, acrolein, butyraldehyde, formaldehyde, glutaraldehyde, glyoxal, propionaldehyde or 1, 3, 5-trioxane and incubated at 40o in rumen fluid buffered at pH 6-8 from a bullock fed on hay of lucerne and brome grass. The solubility of the protein in the meal was estimated in vitro. Acrolein, formaldehyde, glyoxal and glutaraldehyde significantly reduced production of ammonia during incubation. Formaldehyde, glutaraldehyde and glyoxal significantly reduced solubility of protein in phosphate buffer. For 48 days 60 wethers of 32 kg liveweight were given a diet based on shelled cracked maize, with soya bean meal treated with 0.6% formaldehyde or 1.5% glyoxal or with water equivalent to the amount of aldehyde solution, each alone or with 0.3% calcium methionine hydroxy analogue (MHA). Lambs given formaldehyde or glyoxal gained significantly faster and more efficiently than those not getting them. Plasma urea N was less with glyoxal. Wool growth was not significantly affected by aldehyde. MHA reduced plasma urea N. Formaldehyde or glyoxal without MHA gave significantly faster and more efficient gains than the same diet with MHA.