Application of organic materials to soils to enhance N immobilization into microbial biomass, thereby reducing inorganic N concentrations, was studied as a management option to accelerate the reestablishment of the native vegetation on abandoned arable fields on sandy soils the Kiskunság National Park, Hungary. Sucrose and sawdust were used at three different topographic sites over 4 years. N availability and extractable inorganic N concentrations were significantly reduced in all sites. Soil microbial biomass C and microbial biomass N increased significantly following C additions, but the microbial C to microbial N ratio remained unaffected. It is concluded that the combined application of the rapidly utilized C source (sucrose) promoted N immobilization, whereas the addition of the slowly utilized C source (sawdust) maintained the elevated microbial biomass C and microbial biomass N in the field.
|Number of pages||6|
|Journal||Biology and Fertility of Soils|
|Publication status||Print publication - Aug 2007|
Bibliographical noteFunding Information:
Acknowledgments This work was supported by the Hungarian National Research Fund (OTKA T42930), the National Research and Development Programme (NKFP 3B/0008/2002), the TÉT Foundation (UK-HU), and the British Council (Hungary).
Copyright 2008 Elsevier B.V., All rights reserved.
- Soil microbial biomass