مقایسه رویش قطری و ارتفاعی ارقام بومی و غیربومی جدید صنوبر در ایستگاه تحقیقات جنگل و مرتع چمستان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 تحقیقات

2 عضو هیئت علمی موسسه تحقیقات جنگلها و مراتع کشور

چکیده

برای توسعه زراعت چوب، استفاده از کلن‌های پرمحصول جدید صنوبر ضرورت دارد. به منظور معرفی کلن‌های برتر در این تحقیق، 12 کلن جدید صنوبر که طی سال‌های اخیر وارد کشور شده‌اند و دو کلن موفق معرفی شده (بعنوان شاهد) به همراه یک کلن صنوبر بومی سفیدپلت در سه تکرار در فاصله کاشت 4×4متر و بصورت گروهی مربعی در قالب طرح بلوک‌های کامل تصادفی کاشته شدند. صفات قطر و ارتفاع هر ساله پس از پایان فصل رشد اندازه‌گیری شد. صفات کیفی تعداد انحنای تنه، تعداد شاحه قطور تر از 5 سانتی‌متر، تعداد و درصد درختان دو شاخه هر کلن، و ارتفاع محل دوشاخه‌شدن در پایان سال پنجم برای کلیه کلن‌ها تعیین شد. تجزیه واریانس ساده برای قطر و ارتفاع نشان داد که اختلاف معنی‌دار بین کلن‌ها وجود دارد. اما تجزیه واریانس مرکب برای مقادیر رویش قطری و ارتفاعی نشان داد که از نظر رویش قطری بین کلن‌ها، همچنین بین سال‌های مختلف اختلاف معنی‌دار وجود دارد. اما برای مقادیر رویش ارتفاعی، فقط بین سالهای مختلف تفاوت معنی‌دار حاکم است. کلن جدید Populus deltoides marquette، و کلن شاهدP. deltoids 69/55 به ترتیب با 65/13 و 28/13 سانتی‌متر قطر و مقادیر 63/10 و 50/10 متر ارتفاع پس از 5 سال رویش به عنوان کلن‌های برتر معرفی می‌شوند. در مقابل، کلن‌های P. euramericana 87m. 119 و P. euramericana i-sieres با 97/3 و 4 سانتی‌متر قطر و 02/4 و 25/4 متر ارتفاع به عنوان ضعیف‌ترین کلن‌ها تعیین شدند. صفات کیفی نتایج کمی را نقص نکرده است.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of diameter and height growth of native and new non-native poplar clones in Chamestan Forest and Rangeland Research Station

نویسندگان [English]

  • Farhad Asadi 1
  • Mohsen Kalagari 2
2 member of scientific board of Research Institute of Forests and Rangeland
چکیده [English]

In order to develop wood cultivation, it is necessary to use new high-yielding Poplar clones. For introduce the best clones, in this study, 12 new poplar clones that have entered the country in recent years and two previous successful clones (as a control) along with a native Caspian poplar were planted in a randomized complete block design with three replications at a distance of 4 by 4 m. Diameter and height traits were measured each year after the end of the growing season. Qualitative traits including the number of trunk curvature, the number of branches thicker than 5 cm, the number and percentage of two-branched trees in each clone, and the height of the branching position were recorded at the end of the fifth year. Simple analysis of variance for diameter and height values showed significant difference between the clones. However, combined analysis of variance for diameter and height growth values showed a significant difference in terms of diameter growth between clones as well as between different years. But for height growth values, there is a significant difference only between different years. P. deltoides marquette, and P. deltoids 69/55 as control clone with 13.65 and 13.28 cm in diameter and values of 10.63 and 10.50 m in height respectively, after 5 years of growth as best clones are introduced. In contrast, P. euramericana 87m. 119 and P. euramericana i-sieres were identified as the weakest clones. Qualitative traits did not impair the quantitative results.

کلیدواژه‌ها [English]

  • Adaptability experiments
  • fast growing trees
  • poplar clones
  • wood farming

مراجع

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نشریه جنگل و فرآورده های چوب
دوره 74، شماره 3
آذر 1400
صفحه 321-330

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