بررسي اثر دوره بحراني رقابت علف هاي هرز بر عملكرد، اجزاي عملكرد و خصوصيات مورفوفيزيولوژيك لوبيا رقم درخشان

The effects of critical period of weed competition on yield, yield Components and morphophysiological characteristics of dry bean (Phaseolus vulgaris L.) cultivar, Derakhshan(K.R.D-29)

In order to study the effects of weed control treatments on yield and yield components in dry bean under Broujerd region climate, an experiment was conducted in 2002 in randomized complete block design (RCBD) with 12 treatments and 4 replications. Treatments included Two Series: weed free and weed infested up to 14, 28, 42, 56, 70 day after emergence plus weed free check and weed infested check for growing season. This experiment was done using dry bean cultivar Derakhshan (K.R.D-29). Weed competition reduced physiological indices (LAI, TDM, CGR and RGR), morphological indices (pods/plant, seeds and stem height) and yield, but had no effect on 100 seed weight of dry bean. The results of different parameters have been shown and discussed.