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حبیبه سلطانی علی قنبری مهدی راستگو قربانعلی اسدی

چکیده

با هدف تأثیرگذاری تاریخ کاشت و تراکم کاشت بر شاخص¬های رشد و ارزیابی توانایی رقابتی سویا رقم ویلیامز با علف¬های هرز، آزمایشی در سال زراعی 1392 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه فردوسی مشهد در قالب اسپلیت-اسپلیت و طرح پایه بلوک¬های کامل تصادفی به اجرا درآمد. تیمارهای این آزمایش شامل تاریخ کاشت به عنوان عامل اصلی (28 فروردین، 22 اردیبهشت، 16 خرداد) و تراکم کاشت به عنوان عامل فرعی (30، 40، 50، 60 بوته در متر مربع) و مدیریت علف¬های هرز به عنوان عامل فرعی-فرعی (کنترل و عدم کنترل علف¬های هرز) بود. نتایج نشان داد تاریخ کاشت 22 اردیبهشت، نسبت به تاریخ کاشت زودهنگام و تاریخ کاشت تأخیری شاخص سطح برگ، ماده خشک و سرعت رشد بیشتری حاصل کرد. در تراکم¬های بیشتر و تاریخ کشت¬های دیرتر، ماده خشک و شاخص سطح برگ بیشتری تولید شد. در شرایط حضور علف هرز با افزایش تراکم سویا از 30 به 60 بوته در متر مربع، میزان شاخص سطح برگ و ماده خشک افزایش یافت. تفاوت قابل ملاحظه¬ای بین ماده خشک تجمعی، شاخص سطح برگ، سرعت رشد محصول و آهنگ رشد در شرایط تداخل علف¬های هرز (تمام فصل) نسبت به کنترل علف¬های هرز وجود داشت. نتایج نشان داد که تاریخ کاشت 22 اردیبهشت و تراکم 40 بوته در متر مربع علاوه بر بهبود شاخص¬های رشد، سبب افزایش توان رقابتی سویا در مقابل علف¬های هرز می-شود.

جزئیات مقاله

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ارجاع به مقاله
سلطانیح., قنبریع., راستگوم., & اسدیق. (۱۳۹۶-۰۵-۱۱). تأثیر تاریخ کاشت و تراکم بر شاخص¬های رشد گونه¬ها و عملکرد در مزرعه سویا. مطالعات حفاظت گیاهان, 31(3), 396-408. https://doi.org/10.22067/jpp.v31i3.52862
نوع مقاله
علمی - پژوهشی

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