ISHS Acta Horticulturae 732: VIII International Symposium on Canopy, Rootstocks and Environmental Physiology in Orchard Systems
EVALUATION OF ROOTSTOCKS FOR SWEET CHERRY CV. 'VYTENU ROZINE' |
| Authors: | J. Lanauskas, D. Kviklys, N. Uselis |
| Keywords: | P. mahaleb, clonal rootstocks, trunk diameter, productivity, fruit weight, suckering |
| Abstract:
In 1999-2003, at the Lithuanian Institute of Horticulture, the following clonal rootstocks for sweet cherry ‘Vytenu Rozine’ were evaluated: Z1, PN (both Prunus cerasus), P3 and P7 (both P. padus × (P. cerasus × P. avium)); P. mahaleb seedlings served as a control. The soil in the experiment plot was Epicalcari – Endohypogleyic cambisol, clay loam. The weakest growth was shown by trees grafted on the rootstock Z1, where tree trunk diameter achieved 87 mm at the end of the fifth year of growth. With the remaining rootstocks, trunk diameter was 99-103 mm. In 2002-2003, the total yield ranged from 0.94 kg (P. mahaleb seedling) to 4.45 kg (P3) per tree. The lowest tree productivity was on P. mahaleb rootstock (0.014 kg/cm2) and the highest was on P3 (0.061 kg/cm2). The lowest average fruit mass was on trees with rootstocks Z1 and P7, averaging 3.9 and 4.4 g, respectively. In the other rootstock scion combinations, fruit mass averaged 4.9-5.0 g. In the dry year of 2002 (trees were not irrigated), leaves from trees on rootstocks Z1 and P7 exhibited discoloration. Chemical analysis indicated lower leaf nitrogen, potassium, calcium and magnesium content in comparison with the other tested rootstocks. Trees on rootstocks P3 and P7 suckered. The highest tree mortality was on rootstocks Z1 and P7. The most promising rootstock for ‘Vytenu Rozine’ is PN. It is more productive in comparison with P. mahaleb and does not negatively influence fruit size. Trees on PN produce almost no suckers. P3 rootstock showed the highest productivity but it suckered profusely. | |
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