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Drying-rewetting cycles release phosphorus from forest soils

Title data

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. Vol. 179 (2016) Issue 5 . - pp. 670-678.
ISSN 1436-8730
DOI: https://doi.org/10.1002/jpln.201500577

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER132451
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Soil Ecology - Univ.-Prof. Dr. Egbert Matzner
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 16 Jan 2018 08:17
Last Modified: 16 Jan 2018 08:17
URI: https://eref.uni-bayreuth.de/id/eprint/41341