THE EFFECT OF DIFFERENT ZINC APPLICATION METHODS AND LEVELS ON YIELD AND QUALITY OF HESAPALI (Vitis vinifera L.) GRAPE

Abstract

This study has been done to determine the effects of zinc, applied at different doses and in different ways in the fields where NPK was used and also not used as a base fertilizer on the yield and quality of the grape type of Hesapali grown widely in the environs of Aladag, Hadim, and Konya. The test has been applied to the vine grapevine at the doses of 0, 10, 20, 40g Zn/grapevine for both the ones to which NPK was not applied (N0P0K0.) and to which NPK was applied (150-50-50 g/grapevine N1P1K1) in the form of ZnSO(4)7H(2)O. Zn application has been performed in two different forms: I. By mixing all the zinc with the soil (20-30 cm depth) in the projection of the grapevine 15 days before blossom and II. By spraying j of all the zinc over the leaves with a fifteen-day interval at 4 times, which starts 15 days before blossom. According to results of the study: Wet grape yield obtained from each grapevine, which was exposed to the average of two different applications (N0P0K0 and N1P1K1) forms of zinc has statistically increased in an important proportion by increasing the dose of zinc applied to the grapevine. Comparing with the controls, the highest yield of wet grape with the proportion of 212% and 206% has been obtained in N0P0K0 and N1P1K1 applications by applying 10 and 40gram of zinc to each grapevine. Beside as an average of NPK and zinc levels, application of zinc over leaves has increased the yield of the wet grape more than the one applied to the soil (7.00 b and 8.4 a kg grape/grapevine). Moreover water soluble dry matter (%), and titratable acidity (g/100 cc) of grape with rising zinc doses, has increased as an average of NPK and zinc application and, the most water soluble dry matter (18.91%) and titratable acidity (2.74g/100cc) has been obtained by application of 20g Zn/grapevine.