اثر الگوهای مختلف کاشت ذرت (Zea mays L.) در کاهش مصرف علفکش فورام سولفورون (اکوئیب)

نوع مقاله : علمی - پژوهشی

نویسندگان

چکیده

به منظور بررسی استفاده از الگوی کاشت برای کاهش مصرف علف کش در ذرت دانه‌ای رقم سینگل کراس 704، آزمایشی در سال زراعی 1386 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه آزاد اسلامی واحد تاکستان به صورت فاکتوریل در قالب بلوک‌های کامل تصادفی با 4 تکرار انجام شد. فاکتورهای آزمایشی شامل: الگوی کاشت ذرت در سه سطح (تک ردیفه یا معمولی، دو ردیفه روبرو یا مربعی، دوردیفه زیگزاک روی هر پشته) و تیمارهای کنترلی در شش سطح (شاهد بدون حضور علف هرز (وجین کامل)، تیمارهای فورام سولفورون(اکوئیپ) با مقادیر 1، 5/1، 2 و 5/2 لیتر در هکتار و تیمار شاهد با حضور علف هرز) بودند. اندازه گیری عملکرد دانه ذرت و وزن خشک علف‌های هرز به تفکیک گونه در پانزده و چهل و پنج روز پس از سمپاشی انجام شد. نتایج نشان داد که مقادیر مختلف علفکشی در الگوهای کاشت مختلف اثرات متفاوتی را روی علف‌های هرز داشتند، بطوریکه استفاده از مقادیر کاهش یافته علفکش در الگوی کاشت زیگزاکی نسبت به دو الگوی کاشت مربعی و معمولی کنترل مطلوب علف‌های هرز را به همراه داشت. بیشترین عملکرد دانه ذرت پس از شاهد بدون علف هرز مربوط به الگوی کاشت زیگزاکی با مصرف 2 لیتر در هکتار فورام سولفورون و کمترین عملکرد دانه متعلق به الگوی کشت معمولی بود. درمجموع نتایج حاصل از آزمایش نشان داد که انتخاب الگوی کاشت زیگراکی می‌تواند با کاهش مصرف علفکش و در نتیجه مزایای زیست محیطی و اقتصادی همراه باشد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of Planting Pattern of corn (Zea mays L.) in Reducing Foramsulfuron Dose

نویسندگان [English]

  • Mehran SafarKhanloo
  • Eskandar Zand
  • Mohammad Ali Baghestani
  • Alireza Valadabadi
  • Alireza Bagheri
چکیده [English]

In order to evaluate of using planting pattern for reducing herbicides dose in corn (single cross 704), a field experiment was conducted in 2007 at research field of Collage of Agriculture, Islamic Azad University branch of Takestan. The experimental design was randomized complete block with 18 treatments and using factorial design with 4 replications. Treatments consisted of corn planting pattern in 3 levels (single row, rectangular twin row and crinkle twin row), and weed control treatments in 6 levels (rates of 1, 1.5, 2, 2.5 l/ha foramsulfuron, A weed free as control and full season hand weeding control). Biomass of weed species 15 and 45 days after post emergence herbicide application, and seed yield of corn were measured. Results of statistical analysis showed that different dose of herbicide in each planting pattern had a various effect on weeds. Application of low rates of herbicide in crinkle planting pattern was similar to higher dosages of herbicide in rectangular and single planting pattern. The most seed yield was occurred in the crinkle planting pattern with rate of 2 l.ha-1 foramsulfuron and the lowest seed yield was belong to single row planting pattern. Environmental and economical advantages can be obtained by reducing herbicide rates, and selecting an appropriate planting pattern.

کلیدواژه‌ها [English]

  • Amaranthus retroflexus
  • Amaranthus blitoides
  • Chenopodium album
  • Crop arrangement
  • Competiton
  • Foramsulfuron 1-
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······ y= 7.11+46.19/(1+e(-(x -1.27) /-0.23))
R2= 0.99
–·– y= 10.28+34.58/(1+e(-(x -1.23) /-0.29))
R2= 0.99
— y= 9.24+33.80/(1+e(-(x -1.12) /-0.34))
R2= 0.99
Rates of herbicide (l.ha-1)
Percent Yield loss to complete hand
weeding
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