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پاسخ های مورفوـ فیزیولوژی نهال های اقاقیا (.Robinia pseudoacacia L) به تنش خشکی | ||
| نشریه جنگل و فرآورده های چوب | ||
| مقاله 18، دوره 68، شماره 3، آبان 1394، صفحه 715-727 اصل مقاله (631.34 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2015.55600 | ||
| نویسندگان | ||
| ناصر نوروزی هارونی1؛ مسعود طبری کوچکسرایی* 2 | ||
| 1دانش‌آموختة کارشناسی ارشد جنگل‌داری، دانشگاه تربیت مدرس، نور، ایران | ||
| 2استاد، گروه جنگل‌داری، دانشگاه تربیت مدرس، نور، ایران | ||
| چکیده | ||
| هدف این تحقیق بررسی پاسخهای مورفوـ فیزیولوژی نهال اقاقیا تحت تنش خشکی (دورة آبیاری در سطوح 4، 8، 12 و 16 روزه) بود. آزمایش در قالب طرح کاملاً تصادفی در محیط گلخانه صورت گرفت. نتایج نشان‌دهندة معناداری کلیة صفات بررسی‌شده تحت تنش (غیر از کارایی مصرف آب) بود. بیشترین مقدار در اغلب صفات اندازهگیریشده به تیمار آبیاری 4 روزه اختصاص داشت. بزرگ‌ترین اندازة طول ریشه متعلق به نهالهای آبیاری 12 روزه و بزرگ‌ترین اندازة وزن خشک ریشه متعلق به نهالهای دورة آبیاری 4 و 8 روزه بود. بالاترین میزان کارایی آب نهالها به آبیاری 8 روزه و بیشترین میزان نشت الکترولیت برگها به آبیاری 16 روزه اختصاص داشت. به‌طور‌کلی، نهالهای با دورة آبیاری 4 روزه بهترین پاسخهای مورفوـ فیزیولوژی را به تنش خشکی نشان دادند. البته، از نظر صفات مطالعه‌شده، به‌ویژه زندهمانی و اندازههای رویشی، نهالها به تیمار آبیاری 8 روزه (با اختلاف کمی نسبت به دورة آبیاری 4 روزه) پاسخ به نسبت خوبی به تنش خشکی نشان دادند؛ طوری‌که این تیمار میتواند به‌منزلة دور آبیاری قابل قبول و اقتصادی مد نظر قرار گیرد. پژوهشهای مشابه میتواند در نهالستانهای جنگلی با اقالیم سازگار این گونه صورت گیرد. | ||
| کلیدواژه‌ها | ||
| تنش خشکی؛ دورة آبیاری؛ رشد؛ فتوسنتز؛ نشت الکترولیت | ||
| عنوان مقاله [English] | ||
| Morpho-Physiological Responses of Black Locust (Robinia pseudoacacia L.) Seedlings to Drought Stress | ||
| نویسندگان [English] | ||
| naser norouzi haroni1؛ Masoud Tabari koochksaraee2 | ||
| 1M.Sc. Student of Forestry, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran | ||
| 2; Professor, Faculty of Natural Resources, Tarbiat Modares University, Noor, I.R. Iran | ||
| چکیده [English] | ||
| This study was conducted to study of morpho-physiological responses of Robinia pseudoacacia L. seedlings under drought stress by irrigation period at 4 levels (intervals of 4, 8, 12 and 16 days). The experiment was performed as completely randomized design in a greenhouse environment. Results indicated that all studied traits were affected by water stress, except water use efficiency (WUE). The greatest value of most traits was observed in 4-day irrigation. Seedlings treated by 12- day irrigation had the largest root length. The biggest root dry weight belonged to seedlings irrigated in intervals of 4 and 8 days. Irrigation periods of 8 and 16 days remained the highest water use efficiently (WUE) and electronic leakage (EL) for seedlings, respectively. Generally, seedlings with 4-day irrigation period indicated the best response to drought stress. Of course, 8-day irrigation period showed a relatively well response to water stress especially in terms of survival and growth parameters whereas it can be considered as an appropriate and economic irrigation. Similar investigations can be performed in forest nurseries where climate is adapted for R. pseudoacacia growing. | ||
| کلیدواژه‌ها [English] | ||
| Black locust, Drought stress, Growth, Irrigation period, photosynthesis, electrolyte leakage | ||
| مراجع | ||
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