A. Florea, I. Scurtu, D.I. Sumedrea, M. Negru, M. Oprea and A. Bădulescu
The present paper studied the influence of mineral or organic fertilizers, applied together or separately, to soil or foliar administered in three applications between 51-89 BBCH, on the processes of flowering, growth, and fruiting of three cultivars of tomato grown in protected space at the National Institute of Research Development for Biotechnologies in Horticulture Stefanesti. The 2-year experiment was planned in a completely randomized block, with three replicates and four fertilization treatments (mineral soil fertilization, combined fertilization – soil and foliar Ca, combined soil fertilization and organic Biohumus applied foliar; v4- foliar fertilization). Significant, correlations were found in growth and fruiting processes, for all 4 fertilization methods (variants). In both years of the study, the combined fertilization of soil + foliar organic Biohumus induced an increase in SSC %, which attracted a higher MA %, while the combined fertilization of soil and Foliar Ca+ determined a higher percentage of fruit firmness, in both years of study. The highest productions were observed in the case of mineral fertilization combined with Biohumus organic foliar fertilization, with a production increase of 1.25 kg/plant compared to the application of foliar fertilization. Nitrates from fruits do not exceed the limits allowed for growing tomatoes in the greenhouse.
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