The effects of trunk ringing on cropping potential in apple trees

Abstract

The effects of trunk ringing in apple cvs Idared (on MM 106 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 (T2), the indices of generative potential were somewhat higher as related to the variant Tl. However, the differences were not statistically significant. Ringing did not significantly affect the fruit quality - mass and chemical content.

Proučavanje uticaj prstenovanja debla na vegetativni rast i ishranjenost stabala jabuke sorti Ajdared (na podlozi MM106) i Greni Smit (na podlozi M26). Broj vodopija, njihova ukupna dužina i zapremina po stablu nakon dve vegetacije su bili veoma značajno smanjeni kod jednom prstenovanih stabala. Ponovno prstenovanje u proleće naredne godine u potpunosti je eliminisalo obrazovanje prirasta dužih od 80 cm. Sadržaj elemenata mineralne ishrane u listovima tretiranih stabala je bio smanjen, posebno kod dvostrukog prstenovanja.