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Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Kostadin KOSTADINOV, Stoyan FILIPOV, Ivanka TRINGOVSKA

During the period 2012-2014, in steel-glasshouse on the experimental field of Agricultural University - Plovdiv, was carried out a study about elements of organic tomatoes production technology. The following organic fertilizers have been tested: Evrobio; Osmo Bio garden; Biofa; Orgamax; Agrobiosol; Naturale; Lumbrikompost; Alga 600 PO 2; Hemozim bio 5 N5P3K6; StimAK; Softgard. The organic fertilizers have been introduced in their recommended norms. We have explored the influence of fertilization with organic soil fertilizers and foliar spray on productivity of greenhouse grown tomatoes by late production technology. It was established the nutritional substances were assimilated during the whole vegetation period but with different intensity.More intensive assimilation of N, P, K from the beginning of fruit formation to mass bearing was established in both variants with fertilizers in the soil alone, and with soil fertilizers and foliar sprays.

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