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Research article - Peer-reviewed, 2001

Response of sorption processes of MCPA to the amount and origin of organic matter in a long-term field experiment

Haberhauer, Georg; Pfeiffer, L.; Gerzabek, Martin; Kirchmann, Holger; Aquino, A. J. A.; Tunega, D.; Lischka, H.


Changes in farming practices over long times can affect the sorption behaviour of MCPA ((4-chloro-2-methylphenoxy)acetic acid). We studied the adsorption-desorption mechanisms of MCPA on soil with Varied amounts and origins of soil organic matter obtained from a long-term field experiment with various organic amendments. The origin of the soil organic matter seems to be crucial for the sorption behaviour of MCPA. Samples of soil amended with sewage sludge sorbed MCPA more strongly than the soil under any other treatment. Feat-amended soil was second followed by sail receiving animal manure, green manure, mineral fertilizer without N and the fallowed soil. Both the carbon content and the origin of the organic matter are important for the sorption. A decrease of carbon content of a soil does not necessarily imply a reduction of sorption capacity for polar organic acids such as MCPA. Nevertheless, our adsorption-desorption experiments suggest that with decreasing carbon content the role of mineral sorption mechanisms could become more pronounced. Our results showed that interactions of soil organic matter and soil minerals distinctly influence adsorption properties for MCPA.

Published in

European Journal of Soil Science
2001, volume: 52, number: 2, pages: 279-286

Authors' information

Haberhauer, Georg
Austrian Research Centers (ARC)
Pfeiffer, L.
Austrian Research Centers (ARC)
Gerzabek, Martin
Austrian Research Centers (ARC)
Swedish University of Agricultural Sciences, Department of Soil Sciences
Aquino, A. J. A.
Austrian Research Centers (ARC)
Tunega, D.
Austrian Research Centers (ARC)
Lischka, H.
University of Vienna

UKÄ Subject classification

Soil Science
Agricultural Science

Publication Identifiers


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