The effects of trunk ringing on cropping potential in apple trees

Abstract

The effects of trunk ringing in apple cvs Idared (on MM016 rootstock) and Granny Smith (on M26 rootstock) were studied. The trees were ringed in spring, two-three weeks prior to flowering in the one year (variant Tl) or repeatedly - in two subsequent years (variant T2). Ringing did not affect the cropping potential in the year of treatment. Nevertheless, via more abundant flower bud initiations, it multiply increased the stated potential for the following year. Yields of the treated trees in the second year depended on the cultivar and the treatment, being for 2.8 up to 5.3 times higher as compared to the control. In terms of the trees which were ringed twice (T 2), the indices of generative potential were somewhat higher as related to the variant T 1. However, the differences were not statistically significant. Ringing did not significantly affect the fruit quality - mass and chemical content.

U radu su prikazani efekti prstenovanja debla jabuke sorti Ajdared (na podlozi 106) i Greni Smit (na podlozi M26). Stabla su prstenovana u proleće, dve do tri nedelje pre cvetanja samo u jednoj godini, ili ponovljeno, u dve uzastopne godine. Prstenovanje je uticalo na veće diferenciranje cvetnih pupoljaka, stoje u narednoj godini dovelo do višestrukog povećanja obilnosti cvetanja, kao i prinosa. Kvalitet plodova jabuke (masa i hemijski sastav) nije bio značajnije promenjen.