تأثیر‏ مبدأ ‏ بذر و تیمارهای مکانیکی و شیمیایی بر زنده‌مانی و جوانه‌زنی بذر گونه Robinia pseudoacacia L.

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد جنگلداری

2 استادیار دانشگاه سمنان

3 دانشگاه سمنان

4 مربی دانشگاه سمنان

چکیده

با توجه به قرارگیری بخش اعظم نواحی کشور در مناطق خشک و نیمه‌خشک، انتخاب گونه­ مناسب و سازگار برای جنگل‌کاری از اهمیت ویژه­ای برخوردار است. اقاقیا گونه­ای سریع‌الرشد بوده که گرما و سرمای شدید را تحمل کرده و در خاک‌های خشک و ضعیف خوب رشد می‌کند اما این درخت دارای بذوری با پوسته سخت بوده و در نتیجه برای موفقیت در کاشت و جوانه­زنی نیاز به اعمال تیمارهایی جهت حذف این پوسته دارد. هدف از انجام تحقیق حاضر تعیین بهترین مبدأ ‏ جمع­آوری بذر و بهترین تیمار بذر اقاقیا از لحاظ جوانه­زنی و زنده­مانی جهت استفاده از آن در جنگلکاری ها می­باشد. آزمایش با استفاده از بذور جمع­آوری شده از 6 مبدأ شامل سبزوار، سمنان، گرگان، مازندران، تهران و کردستان در قالب طرح کاملأ تصادفی انجام شد. جهت تعیین میزان زنده­مانی بذرها، در ابتدا آزمون تترازولیوم انجام شد. سپس تیمارهای خراش‌دهی با سمباده، ‏اسید سولفوریک 96 درصد، آب جوش100 درجه سانتی­گراد، آب اکسیژنه 1 درصد، آب مقطر و شاهد روی بذرها اعمال گردید. نتایج حاصل نشان داد که در بین تیمارها، تیمار خراش‌دهی با سمباده بالاترین میزان جوانه­زنی را در اکثر مبدأ‏‏ها نشان داده است. هم چنین بین مبدأ‏های جمع­آوری بذور نیز اختلاف معنی­دار  وجود داشت به گونه­ای که می‌توان مبدأ گرگان را با جوانه­زنی 03/73 درصد به عنوان مبدأ‏ برتر و مبدأ تهران را با جوانه زنی 18/48 % به عنوان مبدأ‏‏یی که ضعیف‌ترین عملکرد و کمترین میزان جوانه­زنی را به خود اختصاص داد، معرفی نمود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of provenance, mechanical and chemical treatments on seed viablility and germination rate of Robinia peseudoacacia

نویسندگان [English]

  • Kobra Arjmand 1
  • Alireza Moshki 2
  • Hooman Ravanbakhsh 2
  • Maryam Mollashahi 3
  • MohammadKia Kianian 4
چکیده [English]

In arid climate area like Iran, selection of adapted species plays an important role for afforestation. Robinia peseudoacacia is fast growing and resistance to such an extreme heat and cold conditions of environment and can grow in unfertile soils but posses' seeds covered by hard coat. Therefore, success in planting and germination needed to application of some treatments to remove the coat. The aim of this study was the determination of the best provenances and treatments in terms of Robina seed survival and germination percentage for using in afforestations. The experiment was carried out using Robinia seeds collected from six provenance: Sabzevar, Semnan, Gorgan, Mazandaran, Tehran, and Kordestan using completely randomized design. Tetrazolium test was done for seeds viability. The scarification treatments such as acid, boiling water, oxygen peroxide, normal water, scarification with sandpaper were applied on seeds. The Results showed that scarification with sandpaper induced thehighest germination among all treatments and in the most of provenances. Moreover, the seed provenance had a significant effect in germination of Robinia seeds, therefore it can be introduced that the Gorgan and Tehran provenances are the best and the worst provenances with 73.03% and 48.18% germinating percentage, respectively.

کلیدواژه‌ها [English]

  • H2O2
  • Provenance
  • Robinia peseduacacia
  • Tetrazolium

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علوم و تحقیقات بذر ایران
دوره 5، شماره 2
تیر 1397
صفحه 71-81

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