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Drying-rewetting cycles release phosphorus from forest soils

Titelangaben

Dinh, Mai Van ; Schramm, Thilo ; Spohn, Marie ; Matzner, Egbert:
Drying-rewetting cycles release phosphorus from forest soils.
In: Journal of Plant Nutrition and Soil Science. Bd. 179 (2016) Heft 5 . - S. 670-678.
ISSN 1436-8730
DOI: https://doi.org/10.1002/jpln.201500577

Abstract

Drying–rewetting cycles (D/W) occur frequently in topsoils and may mobilize phosphorus (P).We investigated the effect of repeated D/W on the release of dissolved inorganic (DIP) and organic P (DOP) from forest floors and A horizons. Samples were taken from 3 European beech sites and from 3 Norway spruce sites. Soils were desiccated up to pF 6 (–100 MPa) in three D/W cycles in the laboratory, while the controls were kept permanently at 50% water holding capacity. After each drying, P was extracted from the soils in water. D/W caused the release of DIP and DOP especially from O layers. There was no general difference in response to D/W between samples from beech and spruce. The net release of DIP after D/W was largest from the Oe horizons (average 50–60 mg P kg–1) for both beech and spruce forest soils. The net release of DIPfrom Oi layers was on average 7.8 mg P kg–1 and from spruce Oa layers 21.1 mg P kg–1. In theA horizons, net DIP release was similar in beech and spruce soils with 0.4 mg P kg–1. The releaseof DOP was less than the release of DIP except for the A horizons. Repeated cycles did not increase the release of DIP and DOP. The release of DIP and DOP was positively correlated with the microbial biomass in Oe and Oa layers but not in Oi layers. Our results suggest that D/W may significantly influence the short term availability of dissolved P in both beech and spruce forest soils.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER132451
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Egbert Matzner
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 16 Jan 2018 08:17
Letzte Änderung: 16 Jan 2018 08:17
URI: https://eref.uni-bayreuth.de/id/eprint/41341