Fertilizer type influences tomato yield and soil N2O emissions  

https://doi.org/10.17221/678/2016-PSECitation:Vitale L., Polimeno F., Ottaiano L., Maglione G., Tedeschi A., Mori M., De Marco A., Di Tommasi P., Magliulo V. (2017): Fertilizer type influences tomato yield and soil N2O emissions  . Plant Soil Environ., 63: 105-110.
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Improvements in crop management for a more sustainable agriculture are fundamental to reduce environmental impacts of cropland and to mitigate effects on global climate change. In this study three fertilization types – ammonium nitrate (control); mineral fertilizer added with a nitrification inhibitor (3,4-dimethylpyrazole phosphate (DMPP)), and an organo-mineral fertilizer (OM) – were tested on a tomato crop in order to evaluate effects both on crop production and soil N2O emissions. Plants grown under OM fertilization had a greater relative growth rate compared to mineral fertilization, due to a higher net assimilation rate, which was related to a greater light interception rather than to a higher photosynthetic efficiency. OM fertilization determined the highest fruit production and lower soil N2O fluxes compared to NH4NO3, although the lowest soil N2O fluxes were found in response to mineral fertilizer added with a nitrification inhibitor. It can be concluded that organo-mineral fertilizer is a better nutrient source compared to mineral fertilizers able to improve crop yield and to mitigate soil N2O emission.  
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