M. Ion, A. Serdinescu, Liliana Pircalabu, Mh. Sava
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fertilization, micronutrients, grapevine, wines.
An experiment was conducted to study the possibility of using vitreous fertilizers made from waste from the glass industry in vineyards fertilization. Six recipes were tested having as composition the basic elements: P2O5 (43.5%), K2O (32.6%), MgO (18.5%) and CaO (5.4%), plus the presence of some micronutrients (B, Fe, Zn, Mo, Mn) as oxide form. The efficiency of these fertilizers was made in comparison both with an unfertilized plot and an fertilized plot with NPK applied on the base of optimal rates. The experimental results have shown that this type of fertilizers can replace the use of common chemical fertilizers, their effect on the fertility and productivity of grapevine being relative similar, the benefit consisting of slow release over a long period of time of the nutrients from their composition with positive effects in preventing environmental pollution. The presence of micronutrients in their composition determined even higher yields (by 10-19%) as compare to chemical fertilization and a higher content (by 8-45 %) of anthocyanins in grapes when vitreous fertilizers had B, Fe, Zn and Mo in their composition.
