اثر محلول پاشی روی بر عملکرد کمی و کیفی گندم در شرایط کمبود آب

نوع مقاله: پژوهشی

نویسنده

استادیار دانشگاه اسلامی واحد اردستان.

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. کرت­های 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 کرت­های فرعی شامل سه ژنوتیپ گندم مهدوی، شیراز و پیشتاز و سه غلظت مختلف (0، 5/2 و 5 میلی­گرم بر کیلو­گرم) سولفات روی بودند. نتایج آزمایش نشان داد که با افزایش شدت تنش رطوبتی، عملکرد دانه، مقدار ماده خشک و شاخص برداشت کاهش و پروتئین دانه افزایش یافت. اگر چه با افزایش تنش رطوبتی، عملکرد دانه در همه رقم­ها کاهش نشان داد، اما با قطع آب در مرحله گرده افشانی، رقم پیشتاز با 6107 کیلوگرم در هکتار حداکثر عملکرد دانه را نشان داد و در شرایط آبیاری کامل همه رقم­ها به ویژه رقم مهدوی عملکرد بالایی داشت. نتایج مقایسه میانگین­ها نشان داد که کاربرد سولفات روی تأثیر 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 yield quality and quantity in wheat under water deficit

نویسنده [English]

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

To investigate the effect of foliar application of zinc on yield production and seed quality of wheat under water deficit, an experiment was conducted as split factorial based on a randomized complete block design with three replications during 2009 and 2010 growing seasons. The main plot consisted of different water conditions (complete irrigation, halted irrigation after pollination, and after grain milk stage) and sub-plots comprised three wheat genotypes including Mahdavi, Shiraz and Pishtaz and three different concentrations of zinc including 0, 2.5 and 5 mg.kg-1. The results indicated that increasing stress intensity caused decreased grain yield, total dry matter and harvest index, but seed protein increased. Although, by increase water deficit, grain yield was reduced in all cultivars. Pishtaz showed the maximum grain yield (6107 kg/ha) when irrigation halted at pollination phase. However, all varieties, especially Mahdavi, produced higher yield at complete irrigation condition. Zinc sulfate application had a positive and significant effect on the most studied traits, so that application of 2.5 mg/kg zinc sulfate at complete irrigation treatment increased grain yield up to 27% . Besides, zinc concentration of seeds increased as zinc sulfate was applied.

کلیدواژه‌ها [English]

  • yield
  • Protein
  • Wheat
  • zinc sulfate and water deficit
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