Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 452, Issue -, Pages 78-86Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2013.02.049
Keywords
Ammonium; Carbon sink; Soil cation depletion; Nitrogen deposition; Nitrate; Nutrient seasonality
Categories
Funding
- Spanish Ministerio de Educacion y Ciencia [CGL-2009-11015, REMEDINAL-2S2009/AMB-1783]
- FPU fellowship [AP2006-04638]
- Leverhulme Early Career fellowship
- European Science Foundation Nitrogen in Europe program
- Percy Sladen Memorial Fund
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
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N deposition is currently affecting nutrient cycling in terrestrial ecosystems. We studied the effects of four years of N application (0, 10, 20 and 50 kg N ha(-1) year(-1)+background deposition) on soil chemistry and fertility in a semiarid shrubland in central Spain. Soil pH and nutrient availability fluctuated seasonally. The inorganic-N fraction in soil was dominated by nitrate, as expected in calcareous soils. N application increased inorganic N availability in soil. There was a negative correlation between N application and soil K+ availability and pH, measured as the % change after four years. Soil N and C storage (evaluated as the % change) slightly increased after four years. Our data suggest that, in the short-term, the seasonality of nutrients overwhelm any chemical alteration related to N deposition. However, the potential implication of continuous N addition on soil chemistry in the long-term is not well understood. (c) 2013 Elsevier B.V. All rights reserved.
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