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وحید سرابی احمد نظامی مهدی نصیری محلاتی محمدحسن راشدمحصل

چکیده

بر خصوصیات مورفولوژیک و فیزیولوژیک ذرت دانه ای (Zea mays L.) رقم سینگل کراس 704 در سطوح مختلف تراکم این علف هرز،آزمایشی به صورت کرت های خرد شده در قالب طرح بلوک های کامل تصادفی با سه تکرار در سال زراعی 85-1384در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه فردوسی مشهد انجام شد. زمان سبز شدن سلمه تره با سه سطح 14 روز زودتر, هفت روز زودتر و همزمان با ذرت به عنوان فاکتور اصلی و تراکم این علف هرز با شش سطح صفر، 4، 8، 12، 16 و 20 بوته در مترمربع به عنوان فاکتور فرعی در نظر گرفته شد. نتایج نشان داد که ارتفاع، شاخص سطح برگ و مقدار ماده خشک ذرت با ظهور هر چه زودتر و افزایش تراکم سلمه تره کاهش یافت. در مقابل، هر چه زمان ظهور سلمه تره نسبت به ذرت جلوتر بود، شاخص سطح برگ و ماده خشک علف هرز بخصوص در تراکم های بالا، بیشترین مقدار را داشت. با وجودیکه افزایش تراکم علف هرز سلمه تره باعث کاهش خصوصیات اندازه گیری شده در ذرت شد, ولی روند کاهش در تراکم های بالای این علف هرز معنی دار نبود. در مجموع با توجه به شیب کاهشی می توان اظهار داشت که زمان سبز شدن سلمه تره نسبت به تراکم آن تأثیر بیشتری بر رشد ذرت دارد و به ازای تعداد روزهای سبز شدن زودهنگام علف هرز نسبت به ذرت، توان رقابتی ذرت کاهش یافته و افت شدیدی در رشد آن مشاهده خواهد شد

جزئیات مقاله

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ارجاع به مقاله
سرابی و., نظامی ا., نصیری محلاتی م., & راشدمحصل م. (2011). پاسخ خصوصیات رشدی ذرت (Zea mays L.) به رقابت علف هرز سلمه تره (Chenopodium album L.). بوم شناسی کشاورزی, 2(3), 398-407. https://doi.org/10.22067/jag.v2i3.7653
نوع مقاله
علمی - پژوهشی

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