Short-term effects of nitrogen deposition on soil microbial biomass in Calluna heathlands NW Spain: critical loads
[EN] We evaluate the short-term effects of different N deposition loads on nutrient dynamic of soil microbial biomass in Cantabrian heathlands. A surplus of 10 kg N ha-1 yr-1 above N background deposition was required to increase soil microbial biomass N content in old Calluna heathlands, while a su...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad Rey Juan Carlos |
| Repositorio: | BULERIA. Repositorio Institucional de la Universidad de León |
| OAI Identifier: | oai:buleria.unileon.es:10612/20209 |
| Acceso en línea: | https://apcz.umk.pl/EQ/article/view/EQ.2015.010 https://hdl.handle.net/10612/20209 |
| Access Level: | acceso abierto |
| Palabra clave: | Ecología. Medio ambiente Calluna vulgaris Cantabrian heathlands N critical loads Soil microbial biomass C:N ratio 3103.13 Fertilidad del Suelo 2511.06 Conservación de Suelos 2511.09 Microbiología de Suelos |
| Sumario: | [EN] We evaluate the short-term effects of different N deposition loads on nutrient dynamic of soil microbial biomass in Cantabrian heathlands. A surplus of 10 kg N ha-1 yr-1 above N background deposition was required to increase soil microbial biomass N content in old Calluna heathlands, while a surplus of 20 kg N ha-1 yr-1 was required in young ones. The increase of atmospheric N deposition showed no change in soil microbial biomass C content. This caused a decrease in C:N ratio with the highest N deposition loads, being linked to a bacterial biomass dominance against fungal dominance |
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