مطالعه اثر محلول پاشی روی برعملکرد کمی و کیفی گندم در شرایط کمبود آب

نوع مقاله: پژوهشی

نویسنده

استادیار دانشگاه آزاد اسلامی واحد اردستان، دانشکده کشاورزی، گروه زراعت، اردستان، ایران

چکیده

     به منظور بررسی اثر محلول­پاشی سولفات روی برعملکرد کمی و کیفی گندم در شرایط کمبود آب، آزمایشی در سال­های زراعی 1388 و 1389  به صورت اسپیلت پلات فاکتوریل در قالب طرح بلوک­های کامل تصادفی با سه تکرار اجرا گردید. فاکتور اصلی شامل شرایط رطوبتی مختلف از قبیل آبیاری معمول، تنش رطوبتی انتهای فصل رشد با قطع آبیاری از زمان گرده­افشانی تا انتهای رشد و تنش رطوبتی انتهای فصل رشد با قطع آبیاری از زمان شیری تا انتهای رشد و فاکتورهای فرعی شامل سه ژنوتیپ گندم شامل مهدوی، شیراز و پیشتاز و سه غلظت مختلف 0، 5/2 و 5 میلی­گرم بر کیلو­گرم سولفات روی بودند. نتایج این آزمایش نشان دادکه با افزایش شدت تنش رطوبتی، عملکرد دانه، مقدار ماده خشک و شاخص برداشت کاهش یافته و مقدار پروتیین دانه افزایش یافت. با افزایش تنش رطوبتی، عملکرد دانه در همه رقم­ها کاهش نشان داد، اما ملاحظه شد که با قطع آب در مرحله گرده‎افشانی، رقم پیشتاز حداکثر عملکرد دانه را نشان داد (6107 کیلوگرم در هکتار). در شرایط آبیاری کامل، همه رقم­ها به‎ویژه رقم مهدوی عملکرد بالایی داشت. نتایج مقایسه میانگین­ها نشان داد که کاربرد سولفات روی اثر مثبت معنی‎داری روی اکثر صفات داشت، به­طوری­که مصرف سولفات روی به میزان 5/2 میلی­گرم بر کیلوگرم در شرایط آبیاری کامل باعث افزایش 27 درصدی عملکرد دانه شد. هم‎چنین با مصرف سولفات روی، غلظت روی در دانه به طور معنی‎داری افزایش یافت.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of foliar application of zinc on quantitative and qualitative yield of wheat under water deficit condition

نویسنده [English]

  • Javad Tabatabaeyan
Assistant Prof., Agriculture Faculty, Ardestan Branch, Islamic Azad University, Ardestan, Iran.
چکیده [English]

The effect of foliar application of zinc on yield and seed quality of wheat under water deficit was studied as split factorial experiment based on a randomized complete block design with three replications in 2009­-­2010. Main factor was water deficit condition at three levels of complete irrigation, irrigation halting after pollination, and after grain milk stage. Sub-factors were three wheat genotypes (Mahdavi, Shiraz and Pishtaz) and three different concentrations of zinc (0, 2.5 and 5 mg.kg-1). Results revealed that grain yield, total dry matter and harvest index were reduced and seed protein was increased with stress intensity increasing. All cultivars, particularly Mahdavi showed high performances at complete irrigation condition. However, Pishtaz produced higher grain yield (6107 kg) at irrigation halting after pollination. According to the results, zinc sulfate had positive significant effect on  most of the studied traits and application of zinc sulfate 2.5 mg.kg-1 increased grain yield of wheat up to 27% at complete irrigation condition. Besides, zinc sulfate application increased zinc concentration in seeds, significantly.

کلیدواژه‌ها [English]

  • yield
  • Protein
  • Wheat
  • zinc sulfate
  • Water deficit
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