نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه خاکشناسی، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
2 گروه زراعت، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
چکیده
در راستای کاهش آب آبیاری و صرفهجویی در منابع آب و از طرف دیگر نقش مثبت عناصر کم‌مصرف در کاهش اثرات منفی تنش خشکی این پژوهش انجام شد. این آزمایش در قالب طرح پایه بلوک‌های کامل تصادفی با کرتهای خردشده با سه تکرار در مزرعهای واقع در منطقه حمیدیه در استان خوزستان در سال 98-1397 اجرا شد. تیمارهای آزمایش شامل رژیمهای آبیاری در سه سطح (60، 95 و 130 میلیمتر تبخیر از تشتک تبخیر کلاس A) در کرتهای اصلی و محلولپاشی کلات آهن و روی در سه سطح (عدم محلولپاشی، محلولپاشی دو در هزار و محلولپاشی پنج در هزار) در کرتهای فرعی قرار گرفتند. نتایج نشان داد تیمارهای آزمایش تأثیر معنیداری بر اجزای عملکرد، درصد روی، آهن و پروتئین، عملکرد بیولوژیک و عملکرد دانه داشت. محلولپاشی آهن و روی به میزان پنج در هزار به‌طور معنیداری موجب افزایش عملکرد، اجزای عملکرد دانه، غلظت آهن و روی دانه ذرت شد که با تیمار دو در هزار تفاوت معنیداری نداشت. بیشترین عملکرد دانه (6400.49 کیلوگرم در هکتار) و عملکرد بیولوژیک (1435 گرم در مترمربع) از آبیاری 95 میلیمتر تبخیر از تشت و محلولپاشی آهن و روی به میزان پنج در هزار حاصل شد. با توجه به نتایج به‌دست‌آمده از این پژوهش، محلولپاشی آهن و روی به میزان پنج در هزار در شرایط رطوبتی 95 میلیمتر تبخیر از تشت سبب افزایش 39 درصدی عملکرد دانه و درصد عناصر غذایی ذرت در منطقه حمیدیه شد که قابل توصیه است.
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