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The effect of sodium hydroxide and urea on some storage properties of moist grain

Published online by Cambridge University Press:  27 March 2009

E. R. Ørskov ,
C. S. Stewart  and
J. F. D. Greenhalgh
E. R. Ørskov
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
C. S. Stewart
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
J. F. D. Greenhalgh
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Summary

Storage of high moisture grain treated with NaOH in various concentrations and with and without urea showed that while untreated moist grain (17–26% moisture) deteriorated during storage, grain treated with urea and with various concentrations of NaOH had few bacteria and fungal propagules, and was considered safe for feeding. When the grain was treated with NaOH at 35 g/kg air dry weight, there were less than 102·6 bacteria and fungal propagules/g. Similar results were obtained when grain was stored in large batches in an open shed, although at 20 g NaOH/kg grain there was some deterioration after 6 months.

Mouldy grain treated with NaOH showed an immediate decrease in both fungal propagules and bacteria from about 108 to 104/g.

The possibility of using urea to preserve grain was examined in a 5 months storage trial with urea concentrations varying from 0 to 20 g/kg. With 5 g urea/kg grain there was an immediate decrease in the numbers of bacteria and fungal propagules and the results suggest that 10 g/kg would be safe for storage.

The mechanisms of the preservation effects of NaOH and urea are discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 185 - 188
Copyright
Copyright © Cambridge University Press 1979

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References

Bothast, R. J., Adams, G. H., Hatfield, E. E. & Lancaster, E. B. (1975). Preservation of high moisture corn; microbiological evaluation. Journal of Dairy Science 58, 386–391.CrossRefGoogle Scholar
Britt, D. G. & Hober, J. T. (1976). Preservation of and animal performance on high moisture corn treated with ammonia or propionio acid. Journal of Dairy Science 59, 668–674.CrossRefGoogle Scholar
Dewdney, P. A. (1975). Effect of alkaline conditions on the growth and survival of micro-organisms, pp. 1–9. British Food Manufacturing Industry Research Association, Leatherhead, Surrey.Google Scholar
Efthymiou, C. J. & Joseph, S. W. (1974). Development of a selective entero-coccus medium based on manganese ion deficiency, sodium azide and alkaline pH. Applied Microbiology 28, 411–416.CrossRefGoogle Scholar
Livingstone, R. M., Denerley, H., Stewart, C. S. & Elsely, F. W. H. (1971). Moist barley for growing pigs: some effects of storage method and processing. Animal Production 13, 547–556.Google Scholar
Ørskov, E. R. & Greenhalgh, J. F. D. (1977). Alkali treatment as a method of processing whole grain for cattle. Journal of Agricultural Science, Cambridge 89, 253–255.CrossRefGoogle Scholar
Ørskov, E. R., Mehrez, A. Z. & Smart, R. I. (1974). A method of including urea in whole grain. Journal of Agricultural Science, Cambridge 83, 299–362.CrossRefGoogle Scholar
Ørskov, E. R., Soliman, H. S. & Macdearmid, A. (1978). Intake of hay by cattle given cereal supplements subjected to various degrees of physical treatment or treatment with alkali. Journal of Agricultural Science, Cambridge 90, 611–615.CrossRefGoogle Scholar
Schmidt, L., Weissback, W. & Peters, G. (1978). Harnstoff als Konsovereingsmittel bei der lagerung feuchter Futterstoffe. 1. Mitteilung. Konserverung von Feuchtgetreide Arhiv fur Tierernarung 28, 123–140.Google Scholar
WileY, W. R. & Stokes, J. L. (1962). Requirement of an alkaline pH and ammonia for substrate oxidation by Bacillus pasteurii. Journal of Bacteriology 84, 730–734.CrossRefGoogle ScholarPubMed