Residual effects of soil fumigation on soil respiration and mineralization

A - Papers appearing in refereed journals

Jenkinson, D. S. and Powlson, D. S. 1970. Residual effects of soil fumigation on soil respiration and mineralization. Soil Biology and Biochemistry. 2 (2), pp. 99-108.

AuthorsJenkinson, D. S. and Powlson, D. S.
Abstract

Soils were taken from fields that had been fumigated with formalin or methyl bromide 6 months to 5 years previously. Fumigated and unfumigated soil respired at similar rates when incubated in the laboratory. By contrast, after they had been exposed to chloroform vapour, the fumigated respired less rapidly and mineralized less nitrogen than the unfumigated. Irradiation (2.5 Mrad) was broadly similar to chloroform vapour in its effects on soil respiration and mineralization. These results are attributed to the elimination of a section of the soil biomass during field fumigation: recovery was not complete even after several years.

Field experiments sometimes show a declining crop response to repeated fumigation. Our results show that less nitrogen is mineralized after a second fumigation than after the first. Thus, when nitrogen is limiting growth, a second fumigation will be less effective than the first, quite apart from any effect on plant pathogens.

Year of Publication1970
JournalSoil Biology and Biochemistry
Journal citation2 (2), pp. 99-108
Digital Object Identifier (DOI)doi:10.1016/0038-0717(70)90012-X
Open accessPublished as non-open access
Output statusPublished
Publication process dates
Accepted02 Jan 1970
Copyright licensePublisher copyright
PublisherElsevier
ISSN0038-0717

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