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Position: Home > Articles > Effects of nitrogen and phosphorus fertilization on soil pH-plant productivity relationships in upland grasslands of northern Greece. Pedosphere 2011,21 (6)

Effects of nitrogen and phosphorus fertilization on soil pH-plant productivity relationships in upland grasslands of northern Greece.

作者：

Veresoglou, S. D.;Voulgari, O. K.;Sen, R.;Mamolos, A. P.;Veresoglou, D. S.

单位：

Faculty of Agriculture, Laboratory of Ecology and Environmental Protection, Aristotle University of Thessaloniki, 54124 Thessaloniki (Greece);Department of Environmental and Geographical Sciences, Manchester Metropolitan University, John Dalton Building, Chester Street M15GD, Manchester (UK)

关键词：

altitude;ecological patterns;low productivity grasslands;temperate ecosystems

摘要：

The potential role of soil pH in modulating plant productivity was assessed on the basis of dry mass, harvested in the form of 0.25 m² quadrats, in two low-productivity upland grasslands of northern Greece subjected to annual factorial nitrogen (N) and phosphorus (P) fertilization (15 g N m^-2 year^-1 and 10 g P m^-2 year^-1) over a minimum period of 3 years. It was hypothesized that under these particular conditions, a positive relationship would exist between soil pH and plant productivity and, further, that N or P fertilizer application of a nutrient limited system, would result in a weakening of this positive relationship. A significant positive relationship was confirmed between soil pH and plant productivity in one of the two study areas and a positive trend in the other. Moreover, plant productivity increase, following fertilization, appeared to have a detrimental effect on the soil pH-plant productivity relationship. Findings support the original hypotheses and strengthen the idea that plant diversity-mediated soil pH-plant productivity relationships are a result of the more intense plant speciation that occurred under the more "typical" soil conditions of higher pH in temperate as opposed to tropical regions.

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Effects of nitrogen and phosphorus fertilization on soil pH-plant productivity relationships in upland grasslands of northern Greece.

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