اثر سالسیلیک اسید بر صفات مرتبط با دانه و عملکرد و برخی از ویژگی‌های فیزیولوژیک سینگل کراس 704 ذرت در شرایط متفاوت آبیاری
الموضوعات : مجله علمی- پژوهشی اکوفیزیولوژی گیاهی
مهرداد یارنیا
1
(
گروه زراعت و اصلاح نباتات، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
)
پرستو آق مسجدی
2
(
دانشجوی کارشناسی ارشد، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
)
الکلمات المفتاحية: رژیم آبیاری, محلول پاشی, بلال, تشتک تبخیر,
ملخص المقالة :
این بررسی با هدف مطالعه تاثیر تیمارهای آبیاری در مراحل رشدی و محلول پاشی اسید سالسیلیک بر رشد و عملکرد ذرت (Zea mays L.) در سه تکرار به صورت کرت های دوبارخردشده با طرح بلوک‌های کامل تصادفی در مزرعه تحقیقاتی دانشگاه آزاد اسلامی واحد تبریز و با تیمار های اسید اسکوربیک در دو سطح و تنش آبی در سه سطح انجام پذیرفت. اعمال کم آبی در تمامی مراحل رشدی، کاهش معنی داری در عملکرد دانه ذرت باعث شد. اعمال تیمار آبیاری پس از 110 میلی متر در مرحله پر شدن دانه تاثیری بر عملکرد دانه نداشت، ولی با تشدید کم آبی، کاهشی 6/25 درصد در عملکرد دانه بدست آمد. کاهش مشابهی با اعمال کم آبی در مرحله ظهور گل نر وجود داشت و در مرحله ظهور گل نر با اعمال رژیم های آبیاری پس از 110 و 150 میلی متر از عملکرد دانه بترتیب 3/23 و 7/29 درصد کاسته شد. بیشترین کاهش عملکرد با اعمال کم آبی در مرحله رشد رویشی بدست آمد و اعمال رژیم آبیاری پس از 150 میلی متر ، 9/53 درصد از عملکرد دانه ذرت کاست. محلول‌پاشی اسید سالسیلیک افزایش 7/17 درصدی را در عملکرد دانه ذرت را با میزان 1013 گرم در متر مربع باعث شد. در این بررسی کاهش سطح برگ و میزان کلروفیل، از عوامل مهم کاهنده عملکرد و اجزای عملکرد ذرت تحت تاثیر کم آبی بود ولی مصرف اسید سالسیلیک با تاثیر مثبت بر این صفات از خسارات تنش کم آبی کاهش داد.
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