Optimizing environmental conditions and irrigation regimes can improve grafting success in Persian walnut

The propagation of Persian walnut (Juglans regia) using grafting or budding is often difficult due to envi­ronmental factors. Temperature fluctuation and plant water status affect root pressure (xylem sap exudation “bleeding”) during grafting. An experiment was conducted find the optimum irrigation regime for patch (in July) tongue March) on Juglans regia rootstock un­der three environmental conditions (greenhouse, shade-house outdoor). grafted/budded plants were subjected regimes including 1-day, 3-day 7-day 4 weeks after grafting/budding. Callus formation quality, graft/bud-take recorded four weeks. survival rate growth scions measured months. Based results, success under greenhouse, outdoor 66.7%, 42.6% 17.6%, respectively. highest graft/bud take (94.4%) obtained greenhouse with budding. lowest (0%) observed Under conditions, grafted interval resulted in graft growth. Irrigation intervals best while daily required obtain grown plants. In general, present re­vealed that modifying by applying a equipped mist system warmer area can improve bud-take especially 40.76 33.1%,