Strawberries (Fragaria ×ananassa Duch.) were coated with chitosan combined with calcium gluconate. Following treatment, strawberries were stored at 10°C and 70 ± 5% RH for one week. No sign of fungal decay was observed during the storage period for fruit coated with 1.5% chitosan or 1% chitosan+0.5% CaGlu. By contrast, 12.5% of the strawberries coated with 1% chitosan lacking calcium salt were infected after five days of storage. And addition of calcium to the chitosan solution increased the firmness and nutrients of the fruit [24]. In addition, zinc ion also attracted the interest of several researchers, because of its physiological functions. Zinc is one of the most important essential micro-metallic elements in the human body. It is an essential component of a number of important proteins and is indispensable for its stability and catalytic functions