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2020-07-10Metadata
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Carbon use efficiency and microbial functional diversity in a temperate Luvisol and a tropical Nitisol after millet litter and N addition
Abstract
Tropical soils often contain less soil organic C (SOC) and microbial biomass C (MBC) than temperate soils and, thus, exhibit lower soil fertility. The addition of plant residues and N fertilizers can improve soil fertility, which might be reflected by microbial C use efficiency (CUE) and functional diversity. A 42-day incubation study was carried out, adding leaf litter of the C4 plant finger millet (Eleusine coracana Gaertn.) and inorganic 15N fertilizer. The aim was to investigate amendment effects on CUE and functional diversity in a tropical Nitisol and a temperate Luvisol. At day 42, 28% of the millet litter-derived C (C4) added was mineralised to CO2C4 in the temperate Luvisol and only 18% in the tropical Nitisol, averaging all N treatments. In contrast, none of the different fractions used for calculating CUE values, i.e. CO2C4, MBC4, microbial residue C4, and particulate organic matter C4, differed between the soils in the N0 (no N addition) treatment. CUE values considering microbial residues varied around 0.63, regardless of soil type and sampling day, which needs further evaluation. Millet litter increased autochthonous SOC-derived CO2C3 production, but N addition did not. This priming effect was apparently not caused by N mining. The respiratory response to most substrates added by multi-substrate-induced respiration (MSIR) and, thus, functional diversity was higher in the Luvisol than in the Nitisol. Millet litter had positive and N addition negative effects on the functional diversity of Nitisol, indicating that MSIR is a useful tool for evaluating soil fertility.
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Gefördert im Rahmen des Projekts DEALCitation
@article{doi:10.17170/kobra-202011042067,
author={Schröder, Julia and Jannoura, Ramia and Beuschel, René and Pfeiffer, Birgit and Dyckmans, Jens and Murugan, Rajasekaran and Chavannavar, Suvarna and Wachendorf, Christine and Jörgensen, Rainer Georg},
title={Carbon use efficiency and microbial functional diversity in a temperate Luvisol and a tropical Nitisol after millet litter and N addition},
journal={Biology and Fertility of Soils},
year={2020}
}
0500 Oax
0501 Text $btxt$2rdacontent
0502 Computermedien $bc$2rdacarrier
1100 2020$n2020
1500 1/eng
2050 ##0##http://hdl.handle.net/123456789/11946
3000 Schröder, Julia
3010 Jannoura, Ramia
3010 Beuschel, René
3010 Pfeiffer, Birgit
3010 Dyckmans, Jens
3010 Murugan, Rajasekaran
3010 Chavannavar, Suvarna
3010 Wachendorf, Christine
3010 Jörgensen, Rainer Georg
4000 Carbon use efficiency and microbial functional diversity in a temperate Luvisol and a tropical Nitisol after millet litter and N addition / Schröder, Julia
4030
4060 Online-Ressource
4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/11946=x R
4204 \$dAufsatz
4170
5550 {{Biomasse}}
5550 {{Mikrobieller Abbau}}
5550 {{Kohlendioxid}}
5550 {{Mineralisation}}
5550 {{Organischer Stoff}}
7136 ##0##http://hdl.handle.net/123456789/11946
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2020-11-10T15:25:58Z 2020-11-10T15:25:58Z 2020-07-10 doi:10.17170/kobra-202011042067 http://hdl.handle.net/123456789/11946 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ microbial biomass 13C/12C ratio CO2 mineralisation particulate organic matter multi substrate-induced respiration microbial necromass N uptake 570 Carbon use efficiency and microbial functional diversity in a temperate Luvisol and a tropical Nitisol after millet litter and N addition Aufsatz Tropical soils often contain less soil organic C (SOC) and microbial biomass C (MBC) than temperate soils and, thus, exhibit lower soil fertility. The addition of plant residues and N fertilizers can improve soil fertility, which might be reflected by microbial C use efficiency (CUE) and functional diversity. A 42-day incubation study was carried out, adding leaf litter of the C4 plant finger millet (Eleusine coracana Gaertn.) and inorganic 15N fertilizer. The aim was to investigate amendment effects on CUE and functional diversity in a tropical Nitisol and a temperate Luvisol. At day 42, 28% of the millet litter-derived C (C4) added was mineralised to CO2C4 in the temperate Luvisol and only 18% in the tropical Nitisol, averaging all N treatments. In contrast, none of the different fractions used for calculating CUE values, i.e. CO2C4, MBC4, microbial residue C4, and particulate organic matter C4, differed between the soils in the N0 (no N addition) treatment. CUE values considering microbial residues varied around 0.63, regardless of soil type and sampling day, which needs further evaluation. Millet litter increased autochthonous SOC-derived CO2C3 production, but N addition did not. This priming effect was apparently not caused by N mining. The respiratory response to most substrates added by multi-substrate-induced respiration (MSIR) and, thus, functional diversity was higher in the Luvisol than in the Nitisol. Millet litter had positive and N addition negative effects on the functional diversity of Nitisol, indicating that MSIR is a useful tool for evaluating soil fertility. open access Schröder, Julia Jannoura, Ramia Beuschel, René Pfeiffer, Birgit Dyckmans, Jens Murugan, Rajasekaran Chavannavar, Suvarna Wachendorf, Christine Jörgensen, Rainer Georg doi:10.1007/s00374-020-01487-4 Biomasse Mikrobieller Abbau Kohlendioxid Mineralisation Organischer Stoff publishedVersion EISSN 1432-0789 Issue 8 Biology and Fertility of Soils 1139-1150 Volume 56 false </resource>
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