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Forest type affects the coupled relationships of soil C and N mineralization in the temperate forests of northern China.
- Source :
- Scientific Reports; 10/17/2014, p1-8, 8p
- Publication Year :
- 2014
-
Abstract
- Decomposition of soil organic matter (SOM) is sensitive to vegetation and climate change. Here, we investigated the influence of changes in forest types on the mineralization of soil carbon (C) and nitrogen (N), and their temperature sensitivity (Q<subscript>10</subscript>) and coupling relationships by using a laboratory soil incubation experiments. We sampled soils from four forest types, namely, a primary Quercus liaotungensis forest (QL), Larix principis-rupprechtii plantation (LP), Pinus tabulaeformis plantation (PT), and secondary shrub forest (SS) in temperate northern China. The results showed that soil C and N mineralization differed significantly among forest types. Soil C and N mineralization were closely coupled in all plots, and C5N ratios of mineralized SOM ranged from 2.54 to 4.12. Forest type significantly influenced the Q<subscript>10</subscript> values of soil C and Nmineralization. The activation energy (E<subscript>a</subscript>) of soil C and Nmineralization was negatively related to the SOM quality index in all forest types. The reverse relationships suggested that the carbon quality-temperature (CQT) hypothesis was simultaneously applicable to soil C and N mineralization. Our findings show that the coupled relationships of soil C and N mineralization can be affected by vegetation change. [ABSTRACT FROM AUTHOR]
- Subjects :
- HUMUS
NITROGEN
ACTIVATION energy
HYPOTHESIS
CLIMATE change
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Complementary Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 99051977
- Full Text :
- https://doi.org/10.1038/srep06584