Plant Soil Environ., 2013, 59(11):517-523 | DOI: 10.17221/362/2013-PSE

Effects of 3,4-dimethylphyrazole phosphate-added nitrogen fertilizers on crop growth and N2O emissions in Southern ItalyOriginal Paper

L. Vitale1, L. Ottaiano2, F. Polimeno3, G. Maglione3, U. Amato4, C. Arena5, P. Di Tommasi1, M. Mori2, V. Magliulo1
1 National Research Council - Institute for Mediterranean Agriculture and Forest Systems (CNR-ISAFoM), Ercolano, Italy
2 Department of Agronomy, Naples University Federico II, Portici, Italy
3 National Research Council - Institute for Animal Production System in Mediterranean Environment (CNR-ISPAAM), Naples, Italy
4 National Research Council ? Institute for Applied Mathematics ?Mauro Picone?, Naples, Italy
5 Deparment of Biology, Naples University Federico II, Naples, Italy

The effect of the nitrification inhibitor 3,4-dimethylphyrazole phosphate (DMPP) on N-fertilized crop growth and soil N2O emissions were studied at two experimental sites in Southern Italy, characterised by a Mediterranean climate and different soil texture. The experiments were a randomized block design of two treatments: crop fertilized with NH4NO3 (considered the control treatment) or amended with DMPP plus NH4NO3 (considered the DMPP treatment). ANOVA was performed to assess differences between treatments and fertilization periods whereas simple and multiple linear regressions were performed in order to assess the effect of the soil-related in-dependent variables on soil gases emissions. Growth of potato plants fertilized with DMPP-added nitrogen was enhanced compared to control plants, whereas no benefit on maize plants grown during summer was observed. N2O emissions measured from soil to potato after the first fertilization with DMPP-added nitrogen was reduced during winter, but was higher than control after the second fertilizer application in spring, leading to comparable N2O emission factors (EF1) between treatments. In maize N2O emissions and EF1 were lower for DMPP compared to control treatment. The effectiveness of reduction in soil N2O emission was influenced by soil temperature and water-filled pore space (WFPS) in both experimental sites. However, the overall effect of WFPS was contrasting as N2O emissions were decreased in potato and enhanced in maize.

Keywords: greenhouse gases; plant growth; nitrous oxide; DMPP; Mediterranean climate

Published: November 30, 2013  Show citation

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Vitale L, Ottaiano L, Polimeno F, Maglione G, Amato U, Arena C, et al.. Effects of 3,4-dimethylphyrazole phosphate-added nitrogen fertilizers on crop growth and N2O emissions in Southern Italy. Plant Soil Environ. 2013;59(11):517-523. doi: 10.17221/362/2013-PSE.
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