Effect of CaCh Foliar Application on the Storability of Muskmelon Cultured in NaCl-enforced Hydoponic

摘要

During the hydioponic culture of muskmelon, the effect of adding NaCl in nutrient solution and supplying CaCl_2 on the leaves of muskmelon on respiration and the changes in fruit quality during storage was evaluated. The rate of respiration was higherin fruit with NaCl treatment, but lower with CaCh treatment than in control. The rate of respiration was much lower in fruit stored at low temperature, 5°C, than at room temperature, about 26°C. Same trends were obtained in the production of ethyleneat low and room temper atures. The pulp firmness was lower in NaCl treated fruits, while higher in CaCl_2 treated fruits Muskmelon fruits from control without CaCl_2 application were stored about five days at room temperature, whereas fruits treated withCaCl_2 can be stored about 20 days at low temperature Soluble solid and total sugar contents in muskmelon fruit were higher in the both NaCl and CaCl_2 treatment than in control. The contents in fruits from NaCl treatment decreased during storage. The concentration of ethanol was much higher in NaCl treated fruits, but treatment with NaCl produced low amount of etbanol NaCl treatment can produce high concentration of sugar's in muskmelon fruits, but the shelf-life was decreased in the fruit. The storage problem can be avoided by the leaf application of CaCl_2.