Anaerobic processes in soil

Anaerobic conditions in soil affect plant productivity as well as organic matter and nutrient dynamics. Anaerobic processes often dominate biological and chemical features of flooded and poorly drained soils but in well-drained soils, anoxia is restricted to small zones and to limited periods. The a...

Full description

Saved in:
Bibliographic Details
Published in:PLANT AND SOIL. Vol. 76, no. 1-3. 1984 no. 1-3. 1984, 1984-01, Vol.76 (1/3), p.197-212
Main Authors: TIEDJE, J. M., SEXSTONE, A. J., PARKIN, T. B., REVSBECH, N. P., SHELTON, D. R.
Format: Article
Language:English
Subjects:
Acid soils
Agricultural soils
Agrology
Alkynes
Anaerobic bacteria
Oxygen
Section 4: Anaerobic processes in soils and gaseous losses of nitrogen
Soil biochemistry
Soil microorganisms
Soil pollution
Soil water
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Anaerobic conditions in soil affect plant productivity as well as organic matter and nutrient dynamics. Anaerobic processes often dominate biological and chemical features of flooded and poorly drained soils but in well-drained soils, anoxia is restricted to small zones and to limited periods. The anaerobic processes listed according to their approximate sequence of occurrence as the redox decreases are: Fe³⁺ and Mn⁴⁴ reduction, denitrification, fermentation, nitrate respiration, dissimilatory nitrate reduction to ammonium, sulfate reduction, carbon dioxide reduction, acetate splitting, and proton reduction. Two of the anaerobic processes, denitrification and fermentation of pollutant chemicals have been studied and recent results are summarized here. We describe the measurement of denitrification using a recirculating atmosphere of acetylene, provide quantitative information on the effect of moisture and oxygen on denitrification, and report on the oxygen concentration within soil aggregates measured by oxygen microelectrodes. The current hypotheses for the pathway leading from nitrate to the N-N bond and N₂O are also presented. Recent work in our laboratory has shown a new reaction for the metabolism of some chlorinated organic chemicals. In this reductive dehalogenation, the ring Cl is replaced by a proton. An unusual organism which carried out this reaction has been enriched and isolated on 3-chlorobenzoate. These anaerobic reactions may be of further use in pollutant removal. With these new techniques and knowledge available, it is now possible to gain a better understanding of the biochemistry, physiology, ecology and diversity of the anaerobic organisms and their processes in soil.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02205580