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Preferential use of root litter compared to leaf litter by beech seedlings and soil microorganisms

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Datum

2013

Autor:innen

Guo, Chanjuan
Dannenmann, Michael
Gasche, Rainer
Zeller, Bernd
Papen, Hans
Polle, Andrea
Rennenberg, Heinz

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https://doi.org/10.1007/s11104-012-1521-z
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Biologie: Publikationen
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Plant and Soil. 2013, 368(1-2), pp. 519-534. ISSN 0032-079X. eISSN 1573-5036. Available under: doi: 10.1007/s11104-012-1521-z

Zusammenfassung

Background and aims:
Litter decomposition is regulated by e.g. substrate quality and environmental factors, particularly water availability. The partitioning of nutrients released from litter between vegetation and soil microorganisms may, therefore, be affected by changing climate. This study aimed to elucidate the impact of litter type and drought on the fate of litter-derived N in beech seedlings and soil microbes.

Methods:
We quantified 15N recovery rates in plant and soil N pools by adding 15N-labelled leaf and/or root litter under controlled conditions.

Results:
Root litter was favoured over leaf litter for N acquisition by beech seedlings and soil microorganisms. Drought reduced 15N recovery from litter in seedlings thereby affecting root N nutrition. 15N accumulated in seedlings in different sinks depending on litter type.

Conclusions:
Root turnover appears to influence (a) N availability in the soil for plants and soil microbes and (b) N acquisition and retention despite a presumably extremely dynamic turnover of microbial biomass. Compared to soil microorganisms, beech seedlings represent a very minor short-term N sink, despite a potentially high N residence time. Furthermore, soil microbes constitute a significant N pool that can be released in the long term and, thus, may become available for N nutrition of plants.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

Litter types, Root litter, Leaf litter, Decomposition, Microbial biomass, Plant N metabolism, Soil N pools, 15N recovery

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ISO 690GUO, Chanjuan, Michael DANNENMANN, Rainer GASCHE, Bernd ZELLER, Hans PAPEN, Andrea POLLE, Heinz RENNENBERG, Judy SIMON, 2013. Preferential use of root litter compared to leaf litter by beech seedlings and soil microorganisms. In: Plant and Soil. 2013, 368(1-2), pp. 519-534. ISSN 0032-079X. eISSN 1573-5036. Available under: doi: 10.1007/s11104-012-1521-z
BibTex
@article{Guo2013-07Prefe-43355,
  year={2013},
  doi={10.1007/s11104-012-1521-z},
  title={Preferential use of root litter compared to leaf litter by beech seedlings and soil microorganisms},
  number={1-2},
  volume={368},
  issn={0032-079X},
  journal={Plant and Soil},
  pages={519--534},
  author={Guo, Chanjuan and Dannenmann, Michael and Gasche, Rainer and Zeller, Bernd and Papen, Hans and Polle, Andrea and Rennenberg, Heinz and Simon, Judy}
}
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