Soil organic matter and the extracellular microbial matrix show contrasting responses to C and N availability
نویسندگان
چکیده
منابع مشابه
Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil
Rising temperatures in the Arctic can affect soil organic matter (SOM) decomposition directly and indirectly, by increasing plant primary production and thus the allocation of plant-derived organic compounds into the soil. Such compounds, for example root exudates or decaying fine roots, are easily available for microorganisms, and can alter the decomposition of older SOM ("priming effect"). We...
متن کاملSoil C and N availability determine the priming effect: microbial N mining and stoichiometric decomposition theories.
The increasing input of anthropogenically derived nitrogen (N) to ecosystems raises a crucial question: how does available N modify the decomposer community and thus affects the mineralization of soil organic matter (SOM). Moreover, N input modifies the priming effect (PE), that is, the effect of fresh organics on the microbial decomposition of SOM. We studied the interactive effects of C and N...
متن کاملSoil Organic C: N vs. Water-extractable Organic C: N
Traditionally, soil-testing laboratories have used a variety of methods to determine soil organic matter, yet they lack a practical method to predict potential N mineralization/immobilization from soil organic matter. Soils with high microbial activity may experience N immobilization (or reduced net N mineralization), and this issue remains unresolved in how to predict these conditions of net m...
متن کاملNet N-mineralisation related to soil organic matter pools
Soil organic ma�er and its turnover rate are key parameters for agricultural management practice as well as for environmental issues. In a field experiment comparing organic (compost) and mineral fertilisation and combinations of both the amount of inorganic nitrogen in the soil and the nitrogen uptake by the plants were measured. Considering these data and the fertilisation practice the net N-...
متن کاملThe influence of microbial communities, management, and soil texture on soil organic matter chemistry
Article history: Soil organic matter dynami Received 6 May 2008 Received in revised form 19 November 2008 Accepted 3 February 2009 Available online 18 March 2009
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ژورنال
عنوان ژورنال: Soil Biology and Biochemistry
سال: 2015
ISSN: 0038-0717
DOI: 10.1016/j.soilbio.2015.05.025