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

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

Guo C, Dannenmann M, Gasche R, Zeller B, Papen H, Polle A, Rennenberg H, Simon J.

links:
place:

Plant and Soil, 2012, doi:10.1007/s11104-012-1521-z

Date: 2012

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

Abstract

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 litterderived 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.