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Microbial biomass phosphorus and C/N/P stoichiometry in forest floor and A horizons as affected by tree species

Titelangaben

Zederer, Dan Paul ; Talkner, Ulrike ; Spohn, Marie ; Joergensen, Rainer Georg:
Microbial biomass phosphorus and C/N/P stoichiometry in forest floor and A horizons as affected by tree species.
In: Soil Biology & Biochemistry. Bd. 111 (August 2017) . - S. 166-175.
ISSN 0038-0717
DOI: https://doi.org/10.1016/j.soilbio.2017.04.009

Abstract

Forest floor horizons contain significant total P stocks, but information on the contribution of microbial biomass P (PMB) and on the controlling factors of this pool is limited. Slightly modified fumigation extraction procedures were used toinvestigate the stoichiometric relationships of PMB to microbial biomass C (CMB) and microbial biomass N (NMB) in the forest floor (L, F, H, and A horizons) at five sites, differing in P availability to trees, under adjacent spruce (Picea abies)and beech (Fagus sylvatica) stands. CMB, NMB, and PMB contents were higher in forest floors under beech than under spruce. Mean stocks of PMB and total P were roughly 27 and 100 kg ha−1 in the forest floor, respectively, but did not differbetween the tree species, due to an increased organic matter accumulation in the forest floor under spruce. This reveals the importance of forest floor horizons and microbial biomass turnover for P nutrition of trees in acidic soils with the humus form moder. C/PMB ratios declined from roughly 26 in L to 13 in F and H horizons, followed by an increase toroughly 17 in A horizons. The range of C/PMB ratios was small at all sites in relation to the wide SOC/total P ratios of the litter used as microbial substrate, indicating a relatively strict homeostatic regulation of the forest floor microbial, mainly fungal biomass stoichiometry.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER140435
Keywords: Forest floor; Fumigation extraction; Bray-I extractable P; Soil microbial biomass; Spruce; Beech
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: 12 Jan 2018 07:07
Letzte Änderung: 12 Jan 2018 07:07
URI: https://eref.uni-bayreuth.de/id/eprint/41291