بررسی کارایی دوزهای کاهش یافته علف‌‌کش اگزادیارژیل درکنترل علف‌های‌هرز سیب‌زمینی Solanum tuberosum در مراحل مختلف رشدی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری علوم علف‌های‌هرز، دانشکده علوم کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشگاه محقق اردبیلی

چکیده

به منظور بررسی تأثیر دوزهای کاهش یافته علف‌‌کش اگزادیارژیل به­صورت پس­رویشی در کنترل علف­های­هرز مزارع سیب­زمینی، آزمایشی مزرعه­ای در سال 1392 در ایستگاه تحقیقات کشاورزی و منابع طبیعی آلاروق اردبیل انجام شد. آزمایش به صورت فاکتوریل در قالب طرح بلوک­های کامل تصادفی با سه تکرار و روی رقم آگریا انجام شد. فاکتور اول هفت دز کاهش یافته علف‌‌کش اگزادیارژیل شامل صفر، 05/0 ، 1/0 ، 2/0 ، 4/0، 6/0 و 8/0 لیتر ماده مؤثره در هکتار و فاکتور دوم زمان سمپاشی در سه مرحله سبز شدن سیب­زمینی، استولون­زایی و حجیم­شدن غده بود. نتایج نشان داد که کاربرد دوز 8/0 لیتر ماده مؤثره در هکتار به ترتیب باعث کاهش تراکم و زیست توده علف­های­هرز به میزان 40/48 و 10/66 درصد شد که با دز 6/0 لیتر ماده مؤثره در هکتار تفاوت معنی­داری نداشت. در بین زمان­های مختلف مصرف علف‌‌کش اگزادیارژیل، بالاترین درصد کاهش تراکم و زیست توده علف­های­هرز در مرحله­ی سبز شدن سیب­زمینی بود که بیانگر مؤثر بودن علف‌‌کش اگزادیارژیل در مرحله سبز شدن سیب­زمینی می­باشد. از سویی دیگر، کاربرد اگزادیارژیل به میزان 8/0 لیتر ماده مؤثره در هکتار و در مرحله سبزشدن سیب­زمینی، بالاترین متوسط وزن غده در بوته و عملکرد کل غده در هکتار را ایجاد کرد اما بر تعداد غده در بوته تأثیر معنی­داری ایجاد نکرد.

کلیدواژه‌ها


عنوان مقاله [English]

Efficacy of Oxadiargyl Reduced Doses for the Control of Weeds in Potato (Solanum tuberosum) with Different Application Timing

نویسندگان [English]

  • Elham Samadi Kalhoran 1
  • Mohammad Taghi Alebrahim 2
چکیده [English]

In order to study the effect of reduced doses of oxadiargyl, on weeds control in potato, a field experiment was conducted at Alaroog Research Station in Ardabil during 2013. Experiment arrangement was factorial based on randomized complete blocks design with three replications. First factor included seven reduced dosages of oxadiargyl (0, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8 L a.i/ha) and second factor included oxadiargyl application timing (potato emergence, stoloning and tuber bulking). The results showed that application of 0.8 L a.i/ha of oxadiargyl reduced weed density and biomass to 48.40 and 66.16 percent, respectively which was not significantly different from applying 0.6 L a.i/ha. Maximum reduction percentage of weed density and biomass on the different potato growth stages was at potato emergence stage, which provided the best effectiveness of the oxadiargyl. On the other hand, application of 0.8 L a.i/ha oxadiargyl at potato emergence stage caused the highest mean of tubers weight per plant and total tuber yield, but was not significant on the tuber number per plant.

کلیدواژه‌ها [English]

  • Weed Density
  • Dose- response
  • Weed Biomass
  • Chemical control
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