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مژگان سنجری میجانی علیرضا سیروس مهر براتعلی فاخری

چکیده

به منظور مطالعه اثر تنش خشکی و اسید‌هیومیک بر صفات مورفولوژیک، عملکرد و میزان آنتوسیانین چای¬ترش (Hibiscus sabdarifa L.)، آزمایشی در مرکز آموزش کشاورزی جیرفت در سال 1392 به صورت طرح کرت¬های خرد شده در قالب بلوک¬های کامل تصادفی با سه تکرار اجرا شد. تیمارهای مورد بررسی شامل تنش خشکی در سه سطح به صورت آبیاری پس از 50، 100 و 150 میلی¬متر تبخیر از تشتک تبخیر کلاس آ به عنوان عامل اصلی و مصرف اسید‌هیومیک به صورت شاهد (عدم مصرف)، یک‌بار مصرف همراه با آبیاری، یک‌بار مصرف همراه با آبیاری و یک‌بار محلول-پاشی، یک‌بار مصرف همراه با آبیاری و دو بار محلول¬پاشی به عنوان عامل فرعی در نظر گرفته شدند. اسید‌هیومیک جهت آبیاری و محلول‌پاشی به ترتیب با غلظت 10 کیلوگرم در هکتار و 250 سی‌سی در 100 لیتر آب استفاده شد. تنش خشکی و اسید‌هیومیک اثر معنی¬داری بر پارامترهای رشدی، عملکرد رویشی و زایشی (کاسبرگ) و میزان آنتوسیانین داشت. با افزایش تنش خشکی ارتفاع بوته، طول گل¬آذین، تعداد شاخه فرعی، قطر ساقه، وزن تر و خشک بوته، وزن تر و خشک کاسبرگ کاهش نشان داد و میزان آنتوسیانین افزایش یافت. همچنین بیشترین میزان صفات مذکور از سطح چهارم اسید‌هیومیک حاصل شد. اثر متقابل تنش خشکی و اسید‌هیومیک بر تعداد شاخه فرعی، وزن تر و خشک بوته در سطح احتمال یک درصد معنی¬دار بود. بیشترین میزان این صفات مربوط به تیمار سطح اول تنش و سطح چهارم اسید‌هیومیک بود. به طور کلی، اسید‌هیومیک موجب تعدیل اثرات مضر تنش خشکی در گیاه دارویی چای‌ترش شد.

جزئیات مقاله

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ارجاع به مقاله
سنجری میجانیم., سیروس مهرع., & فاخریب. (2015). اثر تنش خشکی و اسید‌هیومیک بر صفات مورفولوژیک، عملکرد و میزان آنتوسیانین چای‌ترش (Hibiscus sabdarifa L.). بوم شناسی کشاورزی, 8(3), 346-358. https://doi.org/10.22067/jag.v8i3.35508
نوع مقاله
علمی - پژوهشی