بررسی اثرات پایه های مالینگ و مالینگ مرتون و فاصله کشت آنها روی صفات کمی و کیفی سیب رقم رددلیشیز در مشکین شهر

In order to determine appropriate Malling or malling-merton rootstock and densities planting for apple cultivar Red Delicious in Meshkin shahr region.The experiment has carried out in five years period compared two planting densities at (4*2 and 4*3 m ) and three rootstocks, M9, M26, and MM106. The experiment was laid out in a randomized split plot design with density as main plot and rootstocks as sub plot. Each plot contained four trees per density and there were three replicates. Results showed that red delicious apple trees on MM106 and M9 had biggest and lowest trunk diameter, canopy per tree, tree height and branch length, respectively.Planting densities have significated effects on vegetative charectristices of Red Delicious apple trees too. Results showed that trunk diameter , canopy per tree on each three rootstocks (MM106, M9, M26) in low density was bigger than high density. Results showed that yield of Red Delicious apple trees at high density was higher than low density planting.but flower density per tree at low planting density was higher than other. Fruit size at low planting density was bigger than high planting density, and fruit size on M9 was bigger than other rootstocks. Results showed that apple cultivar Red Delicious on M9 had highest yield but yield on M26 and MM106 was similar. Apple cultivar Red Delicious on M9 and M26 rootstocks had highest and lowest flower density respectively