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Phosphorus resorption by young beech trees and soil phosphatase activity as dependent on phosphorus availability

Titelangaben

Hofmann, Kerstin ; Heuck, Christine ; Spohn, Marie:
Phosphorus resorption by young beech trees and soil phosphatase activity as dependent on phosphorus availability.
In: Oecologia. Bd. 181 (2016) Heft 2 . - S. 369-379.
ISSN 1432-1939
DOI: https://doi.org/10.1007/s00442-016-3581-x

Abstract

Motivated by decreasing foliar phosphorus (P) concentrations in Fagus sylvatica L. forests, we studied P recycling depending on P fertilization in mesocosms withjuvenile trees and soils of two contrasting F. sylvatica L.forests in a greenhouse. We hypothesized that forests withlow soil P availability are better adapted to recycle P than forests with high soil P availability. The P resorption efficiency from senesced leaves was significantly higher at the P-poor site (70 %) than at the P-rich site (48 %). P fertilization decreased the resorption efficiency significantly at the P-poor site to 41 %, while it had no effect at the P-rich site. Both acid and alkaline phosphatase activity were higher in the rhizosphere of the P-poor than of the P-rich site by 53 and 27 %, respectively, while the activities did not differin the bulk soil. Fertilization decreased acid phosphataseactivity significantly at the P-poor site in the rhizosphere,but had no effect on the alkaline, i.e., microbial, phosphataseactivity at any site. Acid phosphatase activity in the P-poor soil was highest in the rhizosphere, while in the P-rich soil, it was highest in the bulk soil. We conclude that F. sylvatica resorbed P more efficiently from senescentleaves at low soil P availability than at high P availability and that acid phosphatase activity in the rhizosphere but not in the bulk soil was increased at low P availability. Moreover, we conclude that in the P-rich soil, microbial phosphatases contributed more strongly to total phosphataseactivity than plant phosphatases.Keywords: Forest nutrition, Nutrient resorption, Rhizosphere, Phosphomonoesterase, Plant–microbeinteraction

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER132187
Institutionen der Universität: Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
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: 11 Aug 2016 07:50
Letzte Änderung: 11 Aug 2016 07:50
URI: https://eref.uni-bayreuth.de/id/eprint/33889