FOLIAR FERTILISER INFLUENCES THE YIELD AND QUALITY OF VRANAC VARIETY GRAPES IN A CEMOVSKO FIELD

Earlier research results on the influence of foliar fertilizers on yield and quality of Vranac variety grapes are confirmed. This paper describes the results of 11 preparations of foliar fertilisers and their impact on the yield and quality of the Vranac variety grapes in the plantations of grapes in a ?emovsko field. The plantation is 30 years old. Planting shape of the vines is a bifurcated horizontal cordon with a 70 cm high trunk. The experimental parcel is 0.13 ha. The planting distance is 2.6 x 0.8m. Vines are staked in rows on five support lines running in an east-west direction. The following preparations studied: Wuxal boron, Wuksal ferro, Wuxal super, Cvetal bor, Cvetal kalcijum, Cvetal ?eljezo, Vitastemin, Mortonicj plus, Multi K-Mg, Magnisal, Haskon M10 AD. Altogether, there were 12 control group without foliar fertiliser group and 15 vines per treatment with three reiterations of five vines each. The basic aim of this research was to determine which of the foliar fertilisers would show the most optimal influence on quantity and quality of grape yield, on pheno phases of growth and on other indicators of fertility. The most positive effect (statistically significant) on grape yield compared to the control was seen for the Wuxal boron, Cvetal bor, Magnisal and Multi KMg preparations. Group with the smallest and the largest grape yield were identified. The smallest grape yield per vine, at 4.62 kg, was group number 5, which was top dressed with Cvetal Ca. The highest yield per vine, at 7.17 kg, was group 1, which was top dressed with Wuxal boron, followed by group 4 at 6.78 kg, topdressed with Cvetal bor. Group number 10, which was top dressed with Magnisal, had a yield of 6.48 kg. The preparations that showed the highest (statistically confirmed) economic effect in grapes yield were Wuxal boron, Cvetal bor and Magnisal.