Determination of optimum seed rate and row space for winter safflower
2005
Ranjbar, F. | Hatamzadeh, H.
Optimum seed rate (row space and plant space on rows) through changing plant population and utilization of environmental resources affects yield components and seed yield. In order to investigate the impacts of optimum seed rate on yield components and seed yield, a randomized complete block design field experiment with 3 replication was conducted wintersummer, 2003 and 2004, at Dry land Agricultural Research Institute- Sararood, (Lat. 34°20' N and Long 47°19' E), kermanshah, Iran. In this experiment first factor consisted of 4 level of seed rate (15, 30, 45& 60 seed/m2) and other factor consisted of 3 row distances (30,40 and50cm). In during growth season was noted six traits: plant height, number of branch, number of head, number of seed/head, T.K.W and yield. Optimum seed rate had significant effects on number of branches and head/plant. Decrease in seed rate enhanced in number of branches and head per plant. Number of branches and head per plant showed significant decreases with increasing seed rate. The decrease in grain yield in single plant was mainly due to greater number of plant per m2 leading to nonsignificant difference in grain yield among different seed rates. However 45 seed/m2 with 50 cm row space has highest yield (1846 kg/ha) and 45 seed/m2 with 40 cm row space and 15 seed/m2 with 50 cm row space have lowest yield (about 1300 kg/ha). 50 cm row space with 45 seed/m2 is recommended, because field management in this condition is easier than others.
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