Effects of sowing date on yield and some morphological and physiological characteristics of three bean (Phaseolus vulgaris L.) cultivars in Rudehen

This study was carried out in 2008 in Rudehen region of Tehran province to evaluate the growth of three cultivars (a red bean, a white bean and chitti bean) in normal sowing (15 May) and delay sowing (15 June) dates using a randomized complete block design with four replications in split plot experiment. Stem length, numbers of leaves and flowers, shoot to root ratio, root and stem fresh weight, leaf fresh and dry weight, collar diameter, leaf area index (LAI) and seed yield were measured. The results showed that effect of sowing date for all the characteristics except root dry weight, collar diameter and LAI were significant. The effects of cultivar were also significant for stem length, numbers of leaf and flowers, stem fresh weight, leaf fresh and dry weight, leaf area index (LAI) and seed yield. Interaction effects between sowing date and cultivar were not significant for all of the traits. Normal sowing had the highest averages for all of the significant traits. In red bean, average of all traits expect LAI and seed yield in comparison to other cultivars were significant. Chitti bean had the highest seed yield.