INFLUENCE OF MANGANESE FERTILIZER ON GRAPES EFFICIENCY ON SANDY SOILS OF THE SOUTH RUSSIA

Abstract

As a result of the studies, there has been obtained a new information about
manganese influence on productivity of grape plantations on sandy soils of the
South Russia. Manganese fertilizing of 4 kg active ingredient per 1 ha on the
background addition of nitrogen 90 kg ha-1, phosphorus 90 kg ha-1 and potassium
90 kg ha-1 into a phase of grape sap flow contributes to higher yields and increase
the sugar content of the berries with a significant decrease in juice acidity as
compared with other variants. On determining the average weight of the fruit mass
there has been found that manganese stimulates growth of berries significantly
increasing their weight. The greatest effect of manganese fertilizer insertion is
achieved on introducing it into the phase of sap flow at a dose of 4 kg ha-1 on the
background of N90, К90, Р90. In order to expedite the recovery of vineyards
damaged by frosts to enhance the development of reproductive organs 4 kg ha-1
manganese into the phase of sap flow must be introduced on sandy soils.