Abstract
Preharvest nutrient applications have major impacts on apple tree mineral status, productivity, and fruit quality attributes. Despite the wide use of calcium chloride (CaCl2) for improving apple fruit quality attributes particularly bitter pit, application of amino acid, polyamine and phosphite-based nutrients (Sysstem series) have become popular in the past decade.
Highlights
Preharvest nutrient applications have major impacts on apple (Malus domestica Bork) tree mineral status, productivity, and fruit quality attributes
‘Braeburn’ apple has gained popularity among consumers in the past decade, while it is sensitive to bitter pit disorder
The physiological and biochemical roles of calcium (Ca), nitrogen (N), potassium (K), and magnesium (Mg) on postharvest physiology of pome fruit have been extensively studied, because these elements are known to be more involved in various fruit quality attributes, bitter pit incidence than other mineral elements
Summary
Preharvest nutrient applications have major impacts on apple (Malus domestica Bork) tree mineral status, productivity, and fruit quality attributes. The impacts of Sysstem nutrients on leaf and fruit mineral status in one year and yield and fruit bitter pit and quality attributes in two years were compared with those of commercial “Grower’s nutrients” in ‘Braeburn’ apple (Malus domestica Bork), each year according to a randomized complete block design. The physiological and biochemical roles of calcium (Ca), nitrogen (N), potassium (K), and magnesium (Mg) on postharvest physiology of pome fruit have been extensively studied, because these elements are known to be more involved in various fruit quality attributes, bitter pit incidence than other mineral elements. Et al [9] described that in addition to bitter pit, fruit Ca status affects certain diseases and firmness of apple fruit tissue, because Ca is an essential part of the structure of cell walls, and the integrity of the cell membrane. We found that fruit Ca and K/Ca ratio in the calyx end tissue had stronger association with bitter pit than did those in other portions of apple fruit tissues in ‘Honeycrisp’ apples (Fallahi, et al data not published)
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