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اسماعیل قلی نژاد

چکیده

به¬منظور بررسی اثرات دو گونه قارچ میکوریزا بر کاهش تنش خشکی روی عملکرد و صفات فیزیولوژیک هشت توده محلی کنجد (Sesamum indicum L.)، آزمایشی به¬صورت فاکتوریل اسپلیت پلات بر پایه طرح بلوک¬های کامل تصادفی با سه تکرار در مزرعه تحقیقاتی هنرستان کشاورزی ارومیه در سال زراعی 93-1392 اجرا شد. فاکتور اول شامل سطوح مختلف آبیاری شامل آبیاری نرمال (آبیاری بعد از 70 میلی¬متر تبخیر و تعرق گیاه)، تنش ملایم (آبیاری بعد از 90 میلی¬متر تبخیر و تعرق گیاه) و تنش شدید (آبیاری بعد از 110 میلی¬متر تبخیر و تعرق گیاه)، فاکتور دوم شامل تلقیح گونه قارچ میکوریزا در سه سطح گلوموس موسه¬آ، گلوموس اینترارادیسز و عدم تلقیح با قارچ میکوریزا و فاکتور سوم شامل هشت توده¬ محلی کنجد به نام-های جیرفت 13، محلی طارم زنجان، محلی مغان، ناز چند شاخه، TC-25، TS-3، داراب 14 و دشتستان 5 بود. نتایج نشان داد با افزایش شدت تنش خشکی، تمامی صفات مورد مطالعه به جز وزن ویژه برگ، کاهش معنی¬داری یافت. تنش شدید خشکی عملکرد دانه و محتوای نسبی آب برگ را نسبت به تیمار شاهد به¬ترتیب به¬میزان 63 و 30 درصد کاهش داد. استفاده از دو گونه قارچ میکوریزا نسبت به حالت عدم استفاده، صفات عملکرد دانه (33 درصد)، شاخص سطح برگ (40 درصد) و محتوای نسبی آب برگ (20 درصد) را افزایش داد. ژنوتیپ¬های محلی مغان و محلی طارم زنجان از نظر عملکرد دانه و شاخص¬های فیزیولوژیک بر سایر توده¬های محلی برتری داشتند. بالاترین ضریب همبستگی بین عملکرد دانه با شاخص سطح برگ (**82/0=r) به¬دست آمد. بر اساس نتایج این تحقیق، توده¬های محلی مغان و طارم زنجان جهت کشت در شرایط آبیاری مطلوب و تنش خشکی ملایم و شدید، همچنین همزیستی قارچ میکوریزای گلوموس موسه¬آ با بذر کنجد جهت افزایش عملکرد دانه در شرایط مطلوب آبیاری و جلوگیری از کاهش بیشتر عملکرد دانه در شرایط تنش خشکی شدید توصیه می¬گردد.

جزئیات مقاله

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ارجاع به مقاله
قلی نژاد ا. (2016). تأثیر میکوریزا بر کاهش اثرات تنش خشکی در برخی خصوصیات رشدی توده¬های محلی کنجد (Sesamum indicum L.). بوم شناسی کشاورزی, 9(4), 1099-1116. https://doi.org/10.22067/jag.v9i4.53336
نوع مقاله
علمی - پژوهشی