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Biomass of extramatrical ectomycorrhizal mycelium and fine roots in a young Norway spruce stand – A study using ingrowth bags with different substrates

Title data

Neumann, Jonny ; Matzner, Egbert:
Biomass of extramatrical ectomycorrhizal mycelium and fine roots in a young Norway spruce stand – A study using ingrowth bags with different substrates.
In: Plant and Soil. Vol. 371 (2013) Issue 1-2 . - pp. 435-446.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-013-1701-5

Abstract in another language

Background and aimsThe partitioning of below ground carbon inputs into roots and extramatrical ectomycorrhizal mycelium (ECM) is crucial for theC cycle in forest soils. Here we studied simultaneously the newly grown biomass of ECM and fine roots in a young Norway spruce stand.MethodsIngrowth mesh bags of 16 cm diameter and 12 cm heightwere placed in the upper soil and left for 12 to 16 months. The 2mmmesh size allowed the ingrowth of fungal hyphae and roots whereas a 45 μm mesh size allowed only the ingrowth of hyphae. The mesh bagswere filled with either EA horizon soil, pure quartz sand or crushed granite. Controls without any ingrowth were established for each substrate by solid tubes (2010) andby 1 μm mesh bags (2011). The fungal biomass in the substrates was estimated by the PLFA 18:2ω6,9 and ECM biomass was calculated as difference between fungal biomass in mesh bags and controls.ResultsThe maximum ECM biomass was 438 kg ha−1 in October 2010 in 2 mm mesh bags with EA substrate, and the minimum was close to zero in 2011 in 45 μm mesh bags with quartz sand. The high P content ofthe crushed granite did not influence the ECM biomass. Fine root biomass reached a maximumof 2,343 kg ha−1 in October 2010 in mesh bags with quartz sand after 16 months exposure. In quartz sand and crushed granite, ECMbiomass correlated positivelywith fine root biomass and the number of root tips, andnegatively with specific root length.ConclusionThe ratio of ECM biomass/fine root biomass in October ranged from 0.1 to 0.3 in quartz sand and crushed granite, but from 0.7 to 1.8 in the EA substrate. The results for the EA substrate suggest a large C flux to ECM under field conditions.KeywordsBiomass, Ectomycorrhizal mycelium,Fine roots, Ingrowth bags, Substrate quality, Norway spruce

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER114555
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 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
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 07 Aug 2015 06:59
Last Modified: 07 Aug 2015 06:59
URI: https://eref.uni-bayreuth.de/id/eprint/17651