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Foliage C:N ratio, stage of organic matter decomposition and interaction with soil affect microbial respiration and its response to C and N addition more than C:N changes during decomposition
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SYSNO ASEP 0531840 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Foliage C:N ratio, stage of organic matter decomposition and interaction with soil affect microbial respiration and its response to C and N addition more than C:N changes during decomposition Author(s) Jílková, Veronika (BC-A) RID, ORCID
Straková, P. (FI)
Frouz, Jan (BC-A) RID, ORCIDArticle number 103568 Source Title Applied Soil Ecology. - : Elsevier - ISSN 0929-1393
Roč. 152, August (2020)Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords carbon dioxide ; heavy fraction ; light fraction ; litter ; nutrients ; spoil heaps Subject RIV EH - Ecology, Behaviour OECD category Ecology R&D Projects GA18-24138S GA ČR - Czech Science Foundation (CSF) LM2015075 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001782 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support BC-A - RVO:60077344 UT WOS 000529336600002 EID SCOPUS 85080061832 DOI 10.1016/j.apsoil.2020.103568 Annotation How litter at various stages of decomposition reacts to C and N additions is unclear. Here we used five substrates (litter, fermentation [Oe] layer, bulk soil, and the light fraction [LF] and heavy fraction [HF] of SOM) obtained from sites supporting five plant monocultures (Alnus glutinosa, Quercus robur, Salix caprea, Calamagrostis epigejos, or Picea omorica) with foliage C:N ratios ranging from 17 to 48. These plant-specific communities were experimentally planted on a post-mining heap and had affected the substrates used in this study for 40 years. Soils and other environmental factors were similar among the sites. Substrates were incubated for 3 weeks without nutrient addition or with C (glucose) or N (ammonium nitrate) addition, and microbial respiration was determined weekly. Substrate C:N ratios were determined at the start of the incubation and were highest for litter followed by Oe layer > LF > bulk soil and HF. Foliage C:N ratio was a better indicator of microbial respiration than the substrate C:N ratio, suggesting that the foliage C:N ratio reflected unmeasured leaf properties that determined microbial respiration. Respiration was highest in the litter followed by Oe layer > bulk soil > LF > HF. C addition increased respiration of the bulk soil (+39%), LF (+48%), and HF (+72%). Priming of SOM respiration was therefore higher in substrates with less available C. N significantly increased respiration of litter (+19%) but decreased respiration of bulk soil (−18%). The difference in respiration of HF vs. bulk soil following N addition suggested that, in addition to the stage of decomposition, environmental properties present in bulk soil but absent in HF may cause the reduction in respiration after N addition to bulk soil. Overall, the results indicate that differences in the contents of SOM fractions among soils will affect the responses of those soils to C and N additions. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/abs/pii/S0929139319313459?via%3Dihub
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