اثر تغییرات صفات رویشی کبوده (Populus alba L.) بر تولید چوب در حاشیه رودخانه زاینده‌رود اصفهان

نوع مقاله : علمی- پژوهشی

نویسندگان

1 پژوهشگر، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی

2 دانشیار پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی

چکیده

برای برآورد مقدار تولید چوب صنوبر در صنوبرکاری‌های سنتی، محاسبه میزان رویش آنها ضروری است. به‌منظور بررسی تغییرات صفات رویشی صنوبر در حاشیه رودخانه زاینده‌رود اصفهان، شش توده کبوده (Populus alba L.) از سطح صنوبرکاری‌شده حاشیه رودخانه انتخاب شدند و مشخصات رویشی آنها شامل قطر، ارتفاع، میزان رویش قطری و میزان افزایش ارتفاع اندازه‌گیری شد و سپس رویش حجمی آنها محاسبه شد. داده‌های جمع‌آوری‌شده به‌روش آماری تجزیه واریانس یک‌طرفه تجزیه و تحلیل شدند. براساس نتایج، توده‌ها در صفات ارتفاع، قطر، متوسط رویش و رویه زمینی در سطح اطمینان 99 درصد و در صفت حجم چوب در هکتار در سطح اطمینان 95 درصد تفاوت معنی‌داری را نشان دادند. براساس جدول مقایسه میانگین‌ها، توده چهار ازنظر صفات قطر، ارتفاع و رویه زمینی و توده شش ازنظر حجم چوب تولیدی در هکتار و رویش سالانه بیشترین مقدار را داشتند. میزان رویش سالانه در هکتار از 53/16 تا 25/47 متر مکعب در توده‌های مختلف متغیر بود که این حداکثر تولید چوب علاوه‌بر تفاوت توده، به‌دلیل وجود حداقل فاصله کاشت درختان و افزایش تعداد در هکتار به‌دست آمد. به‌عبارت دیگر تغییرات فاصله کاشت و دخالت‌های مدیریتی در توده‌ها را می‌توان در میزان و کیفیت تولید چوب صنوبر بسیار مؤثر دانست.

کلیدواژه‌ها

عنوان مقاله [English]

Variations in vegetative traits of white poplar (Populus alba L.) for wood farming in riverbanks of Zayandehrood River in Isfahan

نویسندگان [English]

  • Majed Hesami 1
  • Hadi Asadi 2
1 Research Expert, Research Division of Natural Resources, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO
2 Associate Prof., Research Division of Natural Resources, Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO
چکیده [English]

In traditional poplar farming, predicting growth rates in different stands is required to evaluate poplar wood production. Six white poplar (Populus alba L.) stands in river bank of Zayandehrood River in Isfahan province were selected for the present study. Attributes including tree diameter, height, diameter and volume growth rates were measured and calculated. The raw data were subjected to analysis of variance (ANOVA), and the means were separated by Duncan methods. The ANOVA results showed that the effect of P. alba stands on height, diameter, mean growth and the basal area were highly significant (P<0.01). In addition, significant effect was observed for the yield per ha timber volume (P<0.05). The 4th stand showed the greatest diameter, height and basal area, whereas the 6th stand revealed the highest timber volume per ha. Results also showed that the annual growth rates in difference stands ranged from 16.53 to 47.25 m3 per ha, which was affected by both stands and plant densities. This maximum timber production was reached at the maximum plant density. The study concluded that an adequate plant density and proper stand management are crucially effective on quality and quantity of poplar timber production.

کلیدواژه‌ها [English]

  • Isfahan
  • Vegetative traits
  • white poplar

اصل مقاله

 

 

 

 

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