Impact of elevated CO(2) and nitrogen fertilization on foliar elemental composition in a short rotation poplar plantation |
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Authors: | Marinari Sara Calfapietra Carlo De Angelis Paolo Mugnozza Giuseppe Scarascia Grego Stefano |
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Institution: | Department of Agrochemistry and Agrobiology, Università degli Studi della Tuscia, Via S Camillo de Lellis, Viterbo, Italy. marinari@unitus.it |
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Abstract: | The experiment was carried out on a short rotation coppice culture of poplars (POP-EUROFACE, Central Italy), growing in a free air carbon dioxide enriched atmosphere (FACE). The specific objective of this work was to study whether elevated CO(2) and fertilization (two CO(2) treatments, elevated CO(2) and control, two N fertilization treatments, fertilized and unfertilized), as well as the interaction between treatments caused an unbalanced nutritional status of leaves in three poplar species (P. x euramericana, P. nigra and P. alba). Finally, we discuss the ecological implications of a possible change in foliar nutrients concentration. CO(2) enrichment reduced foliar nitrogen and increased the concentration of magnesium; whereas nitrogen fertilization had opposite effects on leaf nitrogen and magnesium concentrations. Moreover, the interaction between elevated CO(2) and N fertilization amplified some element unbalances such as the K/N-ratio. |
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