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Biochemistry of waterlogged soils. Part III1: Decomposition of carbohydrates with special reference to formation of organic acids

Published online by Cambridge University Press:  27 March 2009

V. Subrahmanyan
V. Subrahmanyan
Affiliation:
(Rothamsted Experimental Station, Harpenden, Herts.)
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Extract

(1) In absence of decomposing organic matter addition of nitrate led to no loss of nitrogen.

(2) On addition of small quantities of fermentable matter such as glucose there was (a) rapid depletion of nitrates and oxygen, but no denitrification, and (b) increase in acidity, carbon dioxide and bacteria. The greater part of the soluble nitrogen was assimilated by microorganisms or otherwise converted and the greater part of the added carbohydrate was transformed into lactic, acetic and butyric acids.

(3) The organic acids were formed from a variety of carbohydrates. Lactic acid was the first to be observed and appeared to be formed mainly by direct splitting of the sugar. It decomposed readily, forming acetic and butyric acids. Some acetic acid was formed by direct oxidation of lactic acid, with pyruvic acid as the intermediate product. All the acids were, on standing, converted into other forms by micro-organisms.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 19 , Issue 4 , October 1929 , pp. 627 - 648
Copyright
Copyright © Cambridge University Press 1929

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Footnotes

1

Part of thesis accepted by the University of London for the degree of Doctor of Science.

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