عنوان به زبان ديگر :
Effects of Planting Date, Crop Variety, and Weed Interference on Yield and Yield Components of Dryland Chickpea {Cicer arietinum L.)
چكيده لاتين :
The effects of chickpea (Cicer arietinum L.) varieties, and planting date on weed interference were investigated in a 2-year (2002-3, and 2003-4 growing seasons) field experiment in Agricultural Research Station of Kouhdasht in Lorestan Province. The experimental design was a factorially arranged randomized complete block one with 4 replications. The experiment was comprised of 3 factors of: weed interference at 2 levels (weed free, and weed infested throughout the entire growing season), planting date at 3 levels (autumn, winter, and spring) and chickpea varieties at 3 levels (ILC4g2, Greet, and Hasham). Weed control caused 199%, and 92% grain yield increase (relative to weedy plots) in 2002-3 growing season (drought condition), and 2003-4 growing season (relatively suitable rainfall), respectively, which expresses the severity of weed interference in drought stress conditions. Mean chickpea grain yields were 682, 1067, and 117 kgha"1 for autumn, winter and spring sowing dates, respectively. The average grain yield for chickpea varieties of ILC482, Greet and Hashem were 724, 692, and 451 kgha"1, respectively. In the weed competing conditions, the maximum grain yield of 539 kghaʹ1 was obtained for ILC482, showing the high competitiveness of this variety. Maximum chickpea grain yield (1464 kgha"1) was obtained for Greet variety in winter sowing date, and in the absence of interfering weeds.
