Soil chemistry and fertility alterations in response to N application in a semiarid Mediterranean shrubland

Ochoa-hueso, Raúl and Stevens, Carly J. and Ortiz-llorente, María J. and Manrique, Esteban (2013) Soil chemistry and fertility alterations in response to N application in a semiarid Mediterranean shrubland. Science of the Total Environment, 452-45. pp. 78-86. ISSN 0048-9697

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Science of the Total Environment
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
64305
Deposited By:
Deposited On:
02 May 2013 09:46
Refereed?:
Yes
Published?:
Published
Last Modified:
28 Apr 2020 02:33