بررسی چگونگی پاسخ های مورفولوژیکی و فیزیولوژیکی چمن بومی جنس آگروپیرون به تنش رطوبتی

علوم باغبانی

مقاله 3، دوره 31، شماره 2، شهریور 1396، صفحه 389-400   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jhorts4.v0i0.56268

نویسندگان

مهدی یعقوبی¹؛ مهدی پارسا^{* 1}؛ علی گزانچیان²؛ حمیدرضا خزاعی¹

¹دانشگاه فردوسی مشهد

²مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان خراسان رضوی

چکیده

از مهم ترین مشکلات در جهت توسعه فضای سبز و چمن کاری، کمبود منابع آبی می‌باشد. این تحقیق به منظور بررسی عملکرد و مقاومت چمن‌های بومی در برابر تنش رطوبتی به صورت آزمایش فاکتوریل در قالب طرح کاملا تصادفی در سال 1392 در مرکز تحقیقات کشاورزی و منابع طبیعی خراسان به اجرا در آمد. گونه‌های مختلف چمن بومی اگروپیرون شامل A. elongatum ، A. desertorum، A. cristatum و چمن وارداتی Super sport و 3 سطح تنش شامل تنش شدید (45 درصد ظرفیت زراعی)، تنش متوسط (65 درصد ظرفیت زراعی) و شاهد (85 درصد ظرفیت زراعی) تیمارهای آزمایش را تشکیل می‌دادند. نتایج آزمایش نشان داد که تحت شرایط تنش رطوبتی گونه بومی A. elongatum بیشترین طول برگ، میزان کلروفیل a و b، کلروفیل کل، پرولین و محتوای آب نسبی برگ (RWC) را با 12/82 درصد و کمترین میزان را چمن سوپر اسپورت به خود اختصاص داد. کمترین نشت یونی با 91/17 درصد نیز در گونه A. elongatum مشاهده شد. می‌توان گفت گونه‌های چمن بومی مقاومت بیشتری نسبت به چمن وارداتی تحت شرایط خشکی داشتند و بهترین کیفیت ظاهری در 2 گونه بومی A. elongatum و A. desertorum تحت تنش 65 درصد ظرفیت زراعی رویت شد.

کلیدواژه‌ها

ظرفیت زراعی؛ گونه ها؛ کلروفیل؛ پرولین؛ محتوی آب نسبی برگ؛ کیفیت طاهری

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