بررسی اثر تاریخ کاشت و رژیم های مختلف آبیاری بر عملکرد دانه و اجزای عملکرد گشنیز

In order to evaluation of the effect of water deficit and different sowing dates on yield and yield components of coriander, experiment was performed in based on randomized complete block design as a split plot with three replications at the Research Farm of Campus of Agriculture and Natural Resources, Razi University in 2011-2012. Factors were including irrigation regimes (no irrigation, irrigation once, twice and three times irrigation) and sowing dates (10 November, 10 December 2011, 20 February and 19 March 2012). The results showed that effect of irrigation regimes and sowing date were significant on all traits (biological yield, grain yield, grain weight, number of umbels per plant, number of grains per umbel, plant height and harvest index). The maximum and minimum of grain yield obtainer at three times irrigation (1815.3 kg ha-1) and non irrigation treatment (935.5 kg ha-1), respectively. The highest grain yield was the first sowing date (1594.5 kg ha-1) and fourth sowing dates (824.0 kg ha-1). The interaction of irrigation and sowing date were significant for biological yield, thousands grain weight, number grain per umbels and plant height.