Effects of planting pattern and Nitrogen amounts on yield and yield components of spring safflower in Eghlid region, Fars Province

In order to study the effects of planting pattern and nitrogen amounts and their interaction on yield and yield components of spring safflower cultivar IL111 in Eghlid Agricultural Research and Natural Resources Station was done in split plots as a randomized complete block design with 15 treatments and 3 replications during 2008-2009. The main plots were planting pattern (row distance 30، 45 and 60 cm) and sub plots were five levels of nitrogen (0، 40، 80، 120 and 160 Kg/ha of pure nitrogen) as urea. In this study some plant properties such as seed yield، seed number in head، the number of head in plant، 1000 seed weight، oil seed percent، oil seed yield، biological yield، seed protein percent and leaf nitrogen percent were measured. The results show the highest seed yield (2229 kg/ha) and the highest oil yield (691 kg/ha) were made with 60 cm row distance and 80 kg/ha of pure nitrogen، That was 54 and 59. 2 percent higher than control. The highest number of seed in head (88. 67) that was the most important yield component was obtained from 60cm row distance and 80 kg/ha of pure nitrogen. The highest oil seed percent (31. 7) was obtained from 60cm row distance and 40 kg/ha of pure nitrogen and highest protein seed percent (14. 62) was obtained from 60cm row distance and 160 kg/ha of pure nitrogen. The difference between oil and protein percent show an opposite relation when increasing nitrogen fertilizer levels. By considering the our results، 60cm row distance and 80 kg/ha of pure nitrogen for this safflower cultivar in similar conditions to the experiment is suitable.