Effect of Irrigation, Nutrition and Harvest time on the Quality and Storage life of Red Delicious Apple

In order to evaluation of effects of nutrition, irrigation regimes and harvest time on quality and shelf life of Red delicious apple (Malus domestic) this research was carried out in uremia during two years (2000-2001). Treatment was including irrigation (full irrigation, regulated deficit and removal irrigation two weeks before harvest) harvest time (138,145 and 152 days after full bloom) and nutrition control, foliar spraying of Cacl2 (1%) and spray and dipping of fruits in Cacl2 solution (4%) in harvest time. Total treatment for 6 month in 0 centigrade degree and 85-90% humidity stored. Samples in harvest time viewpoint firmness, TSS, pH, TA and density, juiciness percent, medium weight and macro element measured. And every 30 days once view point firmness, TSS, pH, TA and macro element studied. The result showed that effect of harvest time in 1-% level and interaction nutrition -irrigation and harvest- irrigation in 5% level on firmness significent. TSS viewpoint harvests time and interaction every three treatment in 1-% level significant. PH view point harvest time in 5% level significant. TA view point harvest time in 1- % level significant. Treatment effect of harvest time and irrigation on the medium weight and juiciness fruits in 1% and interaction irrigation-harvest in 5% level significent. But treatment effect of density not significant. Fruit calcium view point harvest and interaction nutrition and harvest time and interaction nutrition and irrigation and interaction every three treatment on calcium in 1% level significent. In general from total quality in the end of storage among treatments not different significant observation. In panel test top number connected to fourth nutrition treatment, second harvest and second method irrigation. Therefore recommend red delicious apple 145 days after full bloom harvested and calcium application spray method to 1% in four time and fruit dipping to 4% solution for 10 minute post harvest and cut of irrigation two week before harvest.