Effectiveness of grapevine fertilization with Duslofert Extra 14-10-2O-7S fertilizer | Efektívnosť hnojenia Duslofertom Extra 14-10-20-7S pri pestovaní viniča hroznorodého
2010
Ložek, O., Slovenská poľnohospodárska univ. v Nitre (Slovak Republic). Fakulta agrobiológie a potravinových zdrojov, Katedra agrochémie a výživy rastlín
In three-year field experiment with 8 varieties of grapevine grown in 8 localities the agronomical effectiveness of combined chloride-free NPKS fertilizer Duslofert Extra 14-10-20-7S was tested. Rate of 100 kg per ha N+314 kg per ha P+118.6 kg per ha K+50 kg/ha S applied in the form of this fertilizer increased the yield of grapevine by 1.29 t per ha, that is by 13.7% under the economical effectiveness KEE=2.66, natural effectiveness KNE=12.9 kg of grapeberries per 1 kg of N and profit of 378.6 Euros per hectare. Content of sugar was increased by 1.02 deg ČNM and nutritional status of grapevine plants was improved by increased content of N, P, K, S nutrients in grapevine leaves in comparison to control treatment. In addition optimal ratio of N:K, N:P, N:S, K:Mg, P:Zn and Fe:Mn was achieved in leaves in growth stage of grapevine flowering.
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