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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 | ||
مراجع | ||
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