كليدواژه :
زمان وجين , عملكرد , نخود پاييزه , تراكم بوته
چكيده لاتين :
To study the effects of plant density and time of weeding on the growth, yield components and grain yield of autumn chickpea, an experiment was conducted during 2005-2006 at Agricultural Research Station of Khorram-abad. Five weeding regimes (no weeding, weeding in three, five, seven weeks after tertiary branching and continuous weeding during the whole growing season) along with four plant densities (20, 40, 60 and 80 plants/m2) constituted a factorial randomized complete block design experiment of three replications. The results showed that delay in weeding from five to seven weeks after tertiary branching reduced the number of pods per plant, number of grains per pod as well as grain yield. The highest number of pods per plant, number of grains per pod and grain yield were obtained by weeding during the whole growing season, but the difference of yield in this treatment with that in the treatment of weeding five weeks following tertiary branching was not significant. Increase in plant density led to significant decrease in the number of primary and secondary branchs, number of pods per plant and a significant increase in grain yield as well. It was 80 plants/m2 which yielded the highest grain, showing no significant difference with 40 and 60 plants/m2 treatments. The results indicated that planting autumn chickpea at 40 plants/m2 along with weeding in five weeks following tertiary branching could be appropriate for chickpea production under conditions similar to those in this experiment.
