Standardization of efficient propagation technique for production of quality planting material in walnut

Abstract

To standardize the efficient propagation techniques of walnut an experiment was carried find out the ideal combination of environment, grafting method, time of grafting and scion type for optimum graft success with three types of scion (top, middle and bottom portion of one-year-old shoot), two grafting methods (wedge and tongue), four time of grafting (15th February, 1st March, 15th March and 1st April) and three environmental conditions (polyhouse, polytrench and open field). The middle portion of scionwood was found superior in graft success (56.39%) and plant growth (154.86 cm). Wedge grafting recorded the higher graft success (52.45%) and plant height than tongue grafting, whereas, polyhouse recorded the highest bud sprouting (65.50%) and graft success (54.46%). Among the time of grafting, the highest graft success (57.99%) was recorded with 15th March. The highest graft success (90.00%) was found in wedge grafting with middle portion of scion performed on 15th of March under polyhouse environmental conditions, thus can be used for mass multiplication of walnut under Kashmir valley.