Macro- and Micronutrient Content in Grapevine Cordons under the Influence of Organic and Mineral Fertilization

  • Florin SALA
  • Cosmin BLIDARIU
Keywords: grapevine cordon, macronutrients, micronutrients, organic and mineral fertilization

Abstract

The vigour of vine cordons, wood maturation and bud viability are dependent on thenutritional status of the vine during the vegetation season. We analysed the nutrient content of cordonsto assess the effect of the fertilization system used in the previous year. We performed fertilizationwith organic fertilizers (manure in doses of 30, 40 and 50 t / ha) and complex NPK fertilizers of thetype (S) + Zn. We determined the content of primary macronutrients (NPK) and secondarymacronutrients (Ca and Mg) and some micronutrients (Fe, Cu, Zn, Mn). With organic fertilization,macronutrient content ranges from 0.556 to 0.707% Ntot, 1.30 to 2.06% P2O5, 0.73 to 1.7% K2O, thevalues being positively correlated with the dose of fertilizer. Secondary macronutrients were identifiedin grape vine cordons in values that range from 2.64 to 2.83% Ca, positively correlated with the doseof fertilizer, and from 1172 to 1010 ppm Mg, the content of which is negatively correlated with thedose of fertilizer. Fe and Cu contents are relatively constant under the influence of organicfertilization, while the values of Mn and Zn increase, depending on the dose of fertilization, rangingfrom 2.120 to 2.570 ppm Mn and 5.570 to 7.58 ppm Zn. With mineral fertilization, primarymacronutrients are present in the wine cordons in quantities of 0.504 to 0.646% Ntot, 0.470-1.630%P2O5 and 0.570-0.680% K2O. Values correlate positively with the dose of mineral fertilizers.Secondary macronutrient content ranges from 1.770 to 2.780% Ca, 783.00 to 2119.00 ppm Mg. Thecontent of microelements fluctuates, the values of Fe and Cu being positively correlated with the doseof mineral fertilizers.
Published
2012-12-09