Fruit Quality in ‘Hongro’ Apple Affected by Porous Film Mulching and K2SO4 Foliar Spray

We investigated the effects of coloring agent and potassium sulfate (K2SO4) foliar sprays, reflective aluminium porous film covering on orchard floor enhancement red peel coloration in ‘Hongro’ apples. Foliar spray sulfate, mulching before harvest increased Hunter a value anthocyanin content fruit peels at harvest. In addition, micro-porous had best effect promoting fruits lower inner canopy, non-colored parts, calyx-end part due to improved light irradience. Although no statistical differences were detected weight, firmness, acidity harvest, soluble solids (SSC) was by spray. Reflective highest incidence sunscald However, did not affect occurrence control fruit. Therefore, result indicated that 20 or 30 d is most effective for coloration.