عنوان مقاله [English]
In order to evaluate the effect of different nutrient systems and cover crops of millet and soybean on weed competition in sesame, an experiment in the research farm of Sari Agricultural Sciences and Natural Resources University as a randomized complete block design with three replications and eight treatments. Experimental treatments were cover crop (soybean and millet) and fertilizer treatments included vermicompost , chemical fertilizer and control (no fertilizer). Also, two treatments of monoculture of sesame were considered as control (weed infestation and weed free). The results of weed sampling in three stages (10- leaf, seed dough and harvesting time) showed that the highest weeds density and biomass was in control with weed infestation and then in soybean cover crop with chemical fertilizer application. The results showed that fertilizer resources and cover crops had a significant effect on the grain yield, number of capsules per plant, seed number per capsule, 1000 seed weight, biological yield, as well as competition index (CI), so that the highest and lowest grain yields were observed in the treatment of millet with organic fertilizer (1630.22 kg ha-1) and millet without fertilizer (413.33 kg ha-1), respectively. The highest number of capsules per plant (41) was observed in weed control and the highest number of seeds per capsule (64.33 and 63.66) and 1000-seeds weight (2.56 and 2.53 g) in two treatments of weed control and millet cover crop with organic fertilizer application, respectively.