تأثیر تلقیح با قارچ میکوریزا بر میزان استقرار نشاء و برخی خصوصیات مورفولوژیکی- رشدی یونجه (Medicago sativa L.) در مرتع بهارکیش قوچان

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشگاه فردوسی مشهد

2 دانشگاه صنعتی شاهرود

چکیده

مهم ترین و حساس ترین مرحله در اصلاح بیولوژیک اراضی مرتعی، استقرار اولیه نشاء گیاهان در طبیعت است که به دلیل شرایط نامساعد محیط در مناطق خشک و نیمه خشک اغلب با شکست مواجه می شود. استفاده از تکنولوژی های نوین و برهمکنش گیاهان با سایر موجودات ممکن است بر استقرار گیاهان در طبیعت کمک کند. هدف این تحقیق بررسی امکان افزایش درصد استقرار و سرعت رشد نشاء های گیاه یونجه (Medicago sativa L.) تلقیح شده با قارچ میکوریزا آربوسکولار در مرتع بهارکیش قوچان بود. بدین منظور بذر های یونجه ابتدا به مدت 20 روز در شرایط گلخانه (سینی های نشاء) کشت و سپس با دوگونه میکوریزا آربوسکولار Glomus mosseae و G. intraradices تلقیح و به گلدان های کاغذی منتقل گردید و پس از یک ماه گلدان ها به مرتع منتقل شد و به صورت طرح آزمایشی کرت های خرد شده بر پایه طرح بلوک های کامل تصادفی با سه تکرار و در مساحتی حدود 3600 مترمربع کشت شد. نتایج نشان داد که میانگین درصد کلونیزه شدن ریشه گیاه یونجه با گونه mosseae G. حدود 7/62 درصد و با میکوریزا G. intraradices حدود 72 درصد بود. همزیستی قارچ میکوریزا بطور معنی داری سبب افزایش درصد استقرار در ابتدای و انتهای فصل رویش شد. تأثیر گونه G. intraradices بر استقرار گیاه یونجه بیشتر بود. علاوه بر این، همزیستی با این گونه سبب افزایش وزن خشک برگ، وزن خشک کل گیاه، وزن خشک ساقه، وزن خشک ریشه و نسبت وزن خشک اندام هوایی به وزن خشک ریشه شد، در حالی که همزیستی با mosseae .G سبب کاهش برخی از این صفات شد یا این که اثری نداشت. بنابراین، بر اساس نتایج این تحقیق قارچ هایG. intraradices را می توان به عنوان یک کود زیستی در افزایش تولید علوفه و استقرار اولیه گیاه یونجه در سطح مراتع نیمه خشک و منطقه بهارکیش قوچان توصیه نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of mycorrhizal inoculation on seedlings establishment and morphological parameters of alfalfa (Medicago sativa L.) in rangeland of Bahar Kish Quchan

نویسندگان [English]

  • R. Azimi 1
  • M. Jankju 1
  • H.R. Asghari 2
1 Ferdowsi University of Mashhad
2 Shahrood University of Technology
چکیده [English]

Plant establishment is the most critical stage in biological renovation of rangelands. The processes which normally fails, due to the harsh conditions in the arid and semiarid environments. New technologies may be used to overcome this problem. The purpose of the present study was to investigate the possibility of enhancing seedling establishment and growth rate of alfalfa (Medicago sativa L.) under natural habitats by inoculation with mycorrhiza species. Seeds of alfalfa were sown under greenhouse for 20 days and inculcated with two species of Glomus intraradices and G. mosseae. After 30 days seedlings were transplanted the rangeland as sub plots as split plot based on RCBD (Randomized complete block design) were evaluated with three replication. Root colonization percent with G. mosseae was 62/7 % and with of G . intraradices was 72%. Mycorrhozal inoculation increased establishment of alfalfa at the early and late growth stages, with stronger effects of G. intraradices than G. mosseae. Furthermore leaf and root dry matter, total dry matter and the shoot/root, was increased as a result of G. intraradices, compared with G. mosseae inoculation. In conclusions, G. intraradices can be used as a biological fertilizer for establishment of alfalfa in semiarid rangeland of Bahar Kish, Quchan.

کلیدواژه‌ها [English]

  • Biofertilizer
  • Colonization
  • Seedling transplantation
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