تعیین دوره بحرانی کنترل علف‌های هرز زیره سبز(Cuminum cyminum) در شرایط دیم در سبزوار

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران

چکیده

آزمایشی به منظور تعیین دوره بحرانی کنترل فلور طبیعی علف‌های هرز درزیره سبز در شرایط دیم در سال زراعی 94-1393در شهرستان سبزوار اجرا شد. آزمایش در قالب طرح بلوک­های کامل تصادفی با سه تکرار صورت پذیرفت و تیمارهای آزمایش دوره‌های 15، 30، 45 و 60روز وجین بعد از سبز شدن در طول فصل رشد (عاری از علف هرز) و 15، 30، 45 و 60روزبدون وجین بعد از سبز شدن (تیمارهای تداخل) در فصل رشد به همراه تیمارهای شاهد عاری از علف هرز و تداخل آلوده به علف هرز در تمام فصل رشد بود. زمان شروع و پایان دوره بحرانی خسارت علف‌های‌ هرز توسط توابع لجستیک و گامپرتز برآورد شد. نتایج نشان داد که وزن خشک علف‌های هرز با افزایش طول دوره آلودگی به علف‌های هرز و کاهش طول دوره عاری از علف‌های هرز به طور معنی­داری افزایش یافت. تداخل تمام فصل در مقایسه با عدم تداخل علف‌های هرز به ترتیب سبب کاهش ارتفاع بوته (29/11%)، تعداد شاخه جانبی (14/39%)، تعداد چتر در بوته (87/46%)، تعداد دانه در چتر (12/43%)، عملکرد دانه (15/43%)، عملکرد بیولوژیکی (99/48%) و عملکرد اسانس (94/26%) شد. دوره بحرانی خسارت علف‌های هرززیره سبز در شرایط دیم با پذیرش تحمل 5 و 10 درصد افت عملکرد دانه، به ترتیب 76-9، 63-12 روز پس از سبز شدن تعیین شد.
 
 

کلیدواژه‌ها


عنوان مقاله [English]

Critical Period of Weed Control in Cumin (Cuminum cyminum) under Rain-Fed Conditionin in Sabzevar

نویسندگان [English]

  • Hoosein Nasarabadi
  • Mohammad Armin
  • Hamid Marvi
چکیده [English]

The critical period of weed control in cumin (Cuminum cyminum) were determined by field study in 2011 in Sabzevar. Experiment was conducted in randomized complete block design with 3 replications. Treatments were weeding at 15, 30, 45and 60 days after emergence during the growing season (weed free), and 15, 30, 45and 60 days without weeding (weed infested) in the growing season and includes free of weed and weed infested in the entire growing season. Beginning and end of the critical period of weed damage were determined by Gompertz and Logistic equations. The results showed that weed dry weight was significantly increased with increasing duration of infection and reduce weed-free period. Full-season weeds interference reduced plant height (11.29%), number of lateral branches (39.14%), number of umbels (46.87%), number of seeds per umbrella (43.12%), seed yield (48.99%), biological yield (48.99%) and essential oil yield (26.94%) compared full season weed-free plots, respectively. Based on 5 and 10% acceptable seed yield losses, the critical period of weed control was 9-76 and 12- 63 days after planting at rain-fed condition.
 
 
 

کلیدواژه‌ها [English]

  • Competition
  • Cumin
  • Dry Farming
  • Interference
  • Yield Loss
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