Effect of sowing date, irrigation period and weed control on growth of height, diameter collar, root height and survival percent of seedlings Cupressus arizonica in nursery

This experiment was performed at randomized block and factorial design with three treatments, sowing date (autumn and winter), irrigation periods (2 and 4 days) and weed mechanical control (7 and 14 days) with four replications and 15 vases (per replications) was established in Zaghe nursery in Khorramabad of Iran. In the end of the first growing season measurements were including height growth, diameter of collar, root length and survival rate. The results showed that weed control treatment of 14 days period higher height growth than 7 days. Effect of sowing date on diameter growth of Cupressus arizonica was investigated and the results showed that maximum diameter growth was in Cupressus arizonica at winter sowing date. Based on results, effect of irrigation periods and weed control on diameter growth was insignificant. In mentioned species effect of on diameter growth was insignificant. Effect of mentioned treatments on survival of Cupressus arizonica was insignificant. Effect of sowing date on root length was significant and maximum length was at winter sowing but effect of irrigation periods and weed control in this treatment was insignificant. Based on results for decrease of cost of seedlings produce in nursery, the duration of weed control and irrigation period can be wide, for better organize.