Effect of foliar applied KNO3 on yield, quality and leaf nutrients of Carignane and Colombard wine grapes.

KNO3 foliar applications given in different doses effected the yield, 100 berry weight, TSS, acidity, pH, TSS/acidity, N and K content of leaf blade and petiole in Carignane and Colombard wine grapes. Results showed that 1 and 2 % KNO3 applications increased the yield and hundred berry weight compared to control and had positive effect on TSS. Because of leaf blights caused by 3 % KNO3 application, certain problems appeared despite an increase in yield and some other parameters according to control. Foliar KNO3 applications caused to increase N and K contents of leaf blade and petiole. It was concluded that the doses of 1 and 2 % can be suggested for agricultural practise. [ABSTRACT FROM AUTHOR]