نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران
2 دانشیار دانشگاه آزاد اسلامی واحد سبزوار
3 گروه کشاورزی، دانشگاه پیام نور، تهران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to investigate the effect of irrigation cut-off time in weed interference conditions, a split plot experiment was conducted in a randomized complete block design with 3 replications in the two cropping years 2018 and 2019. Irrigation cut-off time (full irrigation, irrigation cut-off in flowering stage, irrigation cut-off in seed-filling stage and rainfed cultivation) were considered as main plot and weed interference (interference and non-interference) was considered as sub-plot. The results showed that in the rainy year, the yield and yield components of cumin did not response to irrigation cut-off times, but in the drought year, the highest seed and essential oil yield was obtained with full irrigation and delay in cessation of irrigation had less negative effects on yield and components. Weed interference significantly reduced height, number of lateral branches, number of umbels per plant, number of seeds per umbel, 1000-seed weight, seed yield and essential oil yield, but essential oil percentage was not affected by weed interference. Weed interference in all irrigation regimes reduced yield and yield components. Delays in cessation of irrigation produced more grain and essential oil yield in both interference and non-interference conditions. In general, the results showed that in rainy years, seed and essential oil were not affected by irrigation cut-off time, but in low rainy years, full cumin irrigation produces more grain yield and essential oil in both interference and non-interference conditions.
کلیدواژهها [English]
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