بررسی اثر تاریخ کاشت و تراکم بذر بر عملکرد و اجزای عملکرد ارقام و لاین های امید بخش جو

 

       In order to study on the effects of planting dates and seed density in some of barley cultivars and promising lines, an experiment was conducted in Agricultural and Natural Resource Reseach Center( Jolge- Rokh Reseach station) during 2009-2011. This experiment was in split-factorial layout and RCBD design with three replications in which planting dates( in 3 levels i.e. 10 mehr, 30 mehr, 20 aban) were in main plots and combinations of seed density( in 3 levels i.e. 350, 450, 550 seed per square meter ) and promising lines and cultivars( in 4 levels i.e. Makooei, Bahman, CB-79-10,CB-82-10 ) were in subplots. Results of combined analysis showed that the effects of planting date was significant on the grain yield,spike number(/m2), kernel number(/ spike) and TKW and delaied planting dates decreased grain and spike number(/ m2) and increased kernel number(/ spike) and TKW. On the base of the study, seeding density( in the range of 350 to 550 seed / m2 ) decreased grain yield kernel number(/ spike) but didn’t have any effects on and did not have any significant effects on spike number(/m2) and TKW.In this study, Bahman produced the highest grain yield.