The Infuence of Foliar Managed Fertilizers in Apple Growth Leaf Area

Abstract

We studied the leaf surface of apple varieties Golden Delicious, Idared and Florina, grafted on M26 rootstock aged 6-8 years. The distance of planting trees is 4 x 2 m. The trees are driven by free forms Slanke spill. There were given foliar fertilizers: Urea 46% a. s. (NH2) 2CO, Poly-Feed (NPK 19:19:19 + Mg, Mn, Cu, Zn, Fe, Mo), calcium chloride (CaCl2). The leaf area recorded the highest values in trees with extra root fertilization where urea solution at a concentration of 0.5% was applied, while 75% of flowers have fallen, 0.8% - when fruits have a diameter 10-12 mm and 1.1% when fruits are 25-30 mm in diameter and that the concentration of 0.6%, 0.9%, 1.2% (V4) supplemented with Poly-Feed applications with a concentration of 0.1% when fruits are able to ripe and calcium chloride (CaCl2) in concentrations of 0.6% (V3) and 0.7% (V4) 4 weeks before harvesting the fruit.