home    about    browse    search    latest    help 
Login | Create Account

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

Roux-Michollet, Dad; Dudal, Yves; Jocteur-Monrozier, Lucile and Czarnes, Sonia (2010) Steam treatment of surface soil: how does it affect water-soluble organic matter, C mineralization, and bacterial community composition? Biology and Fertility of Soils, pp. 607-616.

Full text not available from this repository.

Document available online at: https://hal.archives-ouvertes.fr/halsde-00525230


Summary

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 ATRFTIR 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. Steamtreatment showed strong but quickly reversible impacts on the soil functioning, enabling farmers to sow approximately 1 week after treatment.


EPrint Type:Journal paper
Keywords:Bacterial community . Soil disinfestation . Water-extractable organic matter . Organic farming system (en)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0178-2762
DOI:10.1007/s00374-010-0468-6
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41812
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

Repository Staff Only: item control page