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بررسی پایداری قارچ تریکودرما در خاک‌های مختلف و تاثیر آن بر بهبود رشد گیاه خیار

نوع مقاله: مقاله کامل

نویسندگان

1 دانشجوی کارشناسی ارشد رشتة بیماری‌شناسی گیاهی، گروه گیاه‌پزشکی دانشگاه جیرفت

2 استادیار گروه گیاه‌پزشکی دانشگاه جیرفت

3 استادیار گروه علوم خاک، دانشگاه جیرفت

چکیده

گونه‌های جنس تریکودرما از عوامل مهم بهبود‌دهندة رشد گیاهان هستند و شناسایی شرایط بهینة خاک برای بهبود فعالیت آن‌ها سودمند است. در این پژوهش تأثیر پنج سویه از گونه‌های مختلف جنس تریکودرما شامل: Trichoderma harzianum Tr6،T. harzianum T22،T. asperellum T34، T. atroviride P1وT. harzianum Tr9 در شرایط گلخانه روی گیاه خیار بررسی شدند و استرین برتر به‌منظور بررسی تأثیر آن بر بهبود رشد گیاه خیار و نیز ارزیابی پایداری آن در خاک‌های مختلف شامل: خاک نرمال، خاک دارای کمبود عنصر فسفر و پتاسیم، خاک قلیایی، خاک با دو سطح شوری و خاک اسیدی آزمایش شد. نتایج آزمایش‌ها نشان داد که تأثیر قارچ مزبور در خاک‌های دارای تنش‌های شوری و کمبود عناصر پتاسیم و فسفر بر صفات رشدی مورد بررسی در گیاه خیار به لحاظ آماری معنی‌دار بوده است. بیشترین و کمترین میانگین فراوانی جمعیت قارچ به‌ترتیب در خاک اسیدی و خاک خیلی شور به‌دست آمد. در نهایت، می‌توان نتیجه گرفت که یکی از دلایل پایین‌بودن جمعیت تریکودرما در برخی خاک‌ها مناسب‌نبودن شرایط خاک است و در صورت ترمیم جمعیت آن از طریق افزودن سویه‌های موفق قارچ به خاک، می‌تواند در خاک‌های تحت تنش، رشد گیاهان را بهبود بخشد.

کلیدواژه‌ها

موضوعات


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