NDLI: Steam treatment of surface soil: how does it affect water-soluble organic matter, C mineralization, and bacterial community composition?

Content Provider	Springer Nature Link
Author	Roux Michollet, Dad Dudal, Yves Jocteur Monrozier, Lucile Czarnes, Sonia
Copyright Year	2010
Abstract	Steam soil disinfestation is efficiently used in the field for pre-planting pest control. Providing steam to the soil must have consequences, either beneficial or detrimental for the soil functioning. We set up a laboratory experiment to quantify the soil quality dynamics induced by this agricultural practice. In steamed and control soil, we monitored the size, the activity, and the genetic structure of the bacterial community in the top 2 cm soil every second day over a 10-day period after the treatment. We also characterized the bioavailable organic matter using fluorescence and ATR-FTIR spectroscopy. We showed that steaming induced the release of twice as much dissolved organic carbon in steamed soil as in the control soil. This extra carbon was much less fluorescent and contained a higher proportion of aliphatic compounds (alkyl chains, primary alcohols). After an initial drop in the bacterial community, we observed a tenfold increase in the number of bacteria, a flush in carbon mineralization, and genetic structure modification, which could be related to the newly released carbon. Steam treatment showed strong but quickly reversible impacts on the soil functioning, enabling farmers to sow approximately 1 week after treatment.
Starting Page	607
Ending Page	616
Page Count	10
File Format	PDF
ISSN	01782762
Journal	Biology and Fertility of Soils
Volume Number	46
Issue Number	6
e-ISSN	14320789
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-06-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bacterial community Soil disinfestation Water-extractable organic matter Organic farming system Soil Science & Conservation Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Microbiology

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