ISHS Acta Horticulturae 700: International Symposium Towards Ecologically Sound Fertilisation Strategies for Field Vegetable Production
EFFECTS OF DIFFERENT LEVELS OF NITROGEN FERTILIZATION ON YIELD AND FRUIT QUALITY IN PROCESSING TOMATO |
| Authors: | M. Parisi, L. Giordano, A. Pentangelo, B. D'Onofrio, G. Villari |
| Keywords: | Lycopersicon esculentum, marketable yield, yield components, soluble solids, reducing sugar/total solids ratio, suitability for processing |
| Abstract:
The aim of this work was to study the influence of nitrogen supply (from 0 to 250 kg N ha-1) on yield and quality components of processing tomato grown in 2002-2003 in Sele valley (Campania). Nitrogen fertilization increased total yield but not marketable yield, because of a strong increase of unmarketable yield. The highest rate supply resulted in less concentrated ripeness, more phytosanitary problems and an increase of viral damage incidence on fruits. High nitrogen supply worsened some important processing characteristics such as pH, soluble solids, glucose and fructose content as well as the reducing sugar/total solids ratio. | |
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