بررسي اثر مقدار بذرو تاريخ كاشت بر تعداد پنجه ، عملكرد و اجزاء عملكرد شش رقم گندم

Seed densities and planting date on tittering, yield and yield component of six promised Wheat promised Wheat

In order to determine filleting, yield and yield component of Promised bread and durum wheat three experiments were conducted in Safi-abad Agricultural Research Center, with three 15/9, 15/10 and 15/11/1998 planting date. The trials were randomized complete block design with four replication as six wheat varieties, Falat, Atrak, Zagroos, Durum 13, Durum 12 and Chin altar in main plot and five seed densities 50, 100, 200, 400 and 800 seed per m^2 in sub plot. Tillers number per plants and wasting, spike number per m^2 , seed number with spike and thousands seed weight were reduced with delay in plant date of increase in seed densities. Also with raise in densities tillers per plant were decreased, tiller mortality and spike number per m^2 were increased. Competition between plants in 800 seeds per m^2 were caused such decline in spike less than seeds number per m^2 . In every planting date seed number per spike and seed thousands weight were decreased so seed number per m^2 were raised. There was not any significant differences between seed yield in planting date, but this factor were exceed significantly with add to seed number per m^2 . As delay in planting date, seed number per m2 must be increased.