| Title | Carbon use efficiency and microbial functional diversity in a temperate Luvisol and a tropical Nitisol after millet litter and N addition |
| Publication Type | Journal Article |
| Year of Publication | 2020 |
| Authors | Schroeder J., Jannoura R., Beuschel R., Pfeiffer B., Dyckmans J., Murugan R., Chavannavar S., Wachendorf C., Joergensen R.G |
| Journal | Biology and Fertility of Soils |
| Volume | 56 |
| Pagination | 1139-1150 |
| Date Published | Nov |
| Type of Article | Article |
| ISBN Number | 0178-2762 |
| Accession Number | WOS:000547250500001 |
| Keywords | Agriculture, biomass turnover, C-12 ratio, C-13, c-14 glucose, cattle manure, CO(2)mineralisation, decomposition, extraction, FUMIGATION, land-use, long-term fertilization, MICROBIAL, microbial biomass, multi substrate-induced respiration, N uptake, natural-abundance, necromass, Organic matter, Particulate, soil organic-matter, substrate quality |
| 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 coracanaGaertn.) and inorganic(15)N 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 CO(2)C4 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. CO(2)C4, 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 CO(2)C3 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.
|
| Short Title | Biol. Fertil. SoilsBiol. Fertil. Soils |
| Alternate Journal | Biol. Fertil. Soils |
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Schroeder, Julia Jannoura, Ramia Beuschel, Rene Pfeiffer, Birgit Dyckmans, Jens Murugan, Rajasekaran Chavannavar, Suvarna Wachendorf, Christine Joergensen, Rainer Georg
Pfeiffer, Birgit/J-3433-2013
Pfeiffer, Birgit/0000-0002-1820-4533; Schroeder, Julia/0000-0003-3625-104X; Joergensen, Rainer Georg/0000-0002-3142-221X
German Research Foundation (DFG)German Research Foundation (DFG); Indian Department of Biotechnology (DBT)
The Indian soil was sampled within the Research Unit 2432 and financially supported by the German Research Foundation (DFG) and the Indian Department of Biotechnology (DBT). We would like to thank Prof. Dr. Andreas Buerkert for organizing this Research Unit. We would also like to thank Dr. Ellen Hoffmann, Dr. Rudiger Gra ss, and Dr. Thomas Fricke for providing soil and climate data. The technical assistance of Gabriele Dormann, Martin Luttge, Larissa Krause, and Anna Kenn is highly appreciated.
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Springer
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1432-0789
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Joergensen, RG (corresponding author), Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany.
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