چكيده لاتين :
This study carried out to determine the effect of row spacing and planting density on some agronomic characteristics of safflower cv. Kooseh a local variety from Isfahan in summer planting. The experiment was conducted at the Research Field Station, Isfahan University of Technology in 2004- using a split plot arrangement in a randomized complete block design with four replications. The main plots were assigned to row spacings including; 20 and 30 cm in flat planting and 45 cm in bed planting and the sub-plots were planting densities including 40 and 50 plants.m"2 . Plant height and 1000 seed weight were not significantly affected by row spacing. Number of stems.plant"1, number of heads. stem"1, number of heads.plant"1 and number of heads.m"2, number of seeds.head"1, seed yield.plant"1 and per unit area, harvest index and oil content (%) and oil yield were significantly reduced as row spacing increased. The effect of planting density on plant height, number of heads.stem"1, 1000 seed weight, seed yield per unit area, harvest index and oil content (%) and oil yield were not significant. Number of stem.plant"1 and per unit area, number of seeds.head"1, number of heads.plant"1 and number of heads per unit area and plant yield significantly decreased as planting density increased. The highest seed yield per unit area (3150 kg.ha"1) was obtained with 20 cm row spacing and 50 plants, m"2. It is concluded that this planting pattern would be suitable for summer planting of safflower cv. Kooseh a local variety from Isfahan, under conditions similar to this experiment.
