تأثیر اجرای شیوه تک‌گزینی بر برخی خصوصیات کمی و کیفی و خاک جنگل‌های شفارود

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانش آموخته دکتری، گروه جنگلداری، دانشکده منابع طبیعی‏، دانشگاه ارومیه، ارومیه، ایران

2 استاد، گروه جنگلداری، دانشکده منابع طبیعی‏، دانشگاه ارومیه، ارومیه، ایران

3 دکتری، گروه جنگلداری، دانشکده منابع طبیعی‏، دانشگاه ارومیه، ارومیه، ایران

چکیده

هدف این پژوهش ارزیابی تأثیر مدیریت به شیوه تک گزینی بر برخی ویژگی­های کمی و کیفی توده جنگلی منطقه شفارود و مقایسه این شاخص­ها با توده­های شاهد در آن منطقه است. جمع­آوری اطلاعات از چهار سری (5، 8، 17 و 18) در چهار طبقه ارتفاعی کمتر از 600، 600 تا 1000، 1000 تا 1500 و بیشتر از 1500 متر از جنگل­های شفارود انجام شد. در هر سری یک پارسل مدیریت­شده و یک پارسل شاهد انتخاب و با استفاده از شبکه آماربرداری 100 در 200 متر، در هر پارسل 15 قطعه نمونه دایره­ای به مساحت 10 آر برداشت شد. تعداد پنج قطعه­نمونه از هر پارسل به­صورت تصادفی انتخاب و نمونه­های خاک برداشت شدند. نتایج نشان داد، میانگین هر دو شاخص قطر و سطح مقطع برابرسینه در منطقه شاهد (11/32 سانتی­متر، 05/1158 سانتی­مترمربع) بیشتر از منطقه مدیریت­شده (93/25 سانتی­متر، 94/724 سانتی­متر مربع) بوده و تراکم پایه­ها در منطقه مدیریت­شده (66/391) بیشتر از منطقه شاهد (50/317) است. همچنین میانگین قطر برابرسینه در طبقه ارتفاعی بالاتر از 1500، بیشتر از طبقات پایین­تر است. ازطرفی معلوم شد که مدیریت جنگل به شیوه تک­گزینی بر هیچ­کدام از شاخص­های مورد بررسی خاک تأثیر معنی­داری نداشته است اما عامل ارتفاع از سطح دریا بر تمامی شاخص­های مورد بررسی خاک تأثیر معنی­­دار دارد. پژوهش حاضر نشان داد، اجرای شیوه تک­گزینی، بهبود مشخصه­های کمی و کیفی توده های جنگلی مورد بررسی را موجب شده است.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of single-tree selection method on some quantitative and qualitative ‎characteristics and soil of Shafarood forests

نویسندگان [English]

  • Behroz Karamdost Marian 1
  • Ahmad Alijanpour 2
  • Abbas Banj Shafiei 2
  • Samira Sasanifar 3
1 PhD. of Forestry, Department of Forestry, Faculty of Natural Resources, Urmia University, Urmia, I. R. ‎Iran‎
2 Professor, Department of Forestry, Faculty of Natural Resources, Urmia University, Urmia, I. R. Iran‎
3 PhD. of Forestry, Department of Forestry, Faculty of Natural Resources, Urmia University, Urmia, I. R. ‎Iran
چکیده [English]

The main purpose of this study is to evaluate the effects of single-tree selection method on some quantitative and qualitative characteristics of Shafarood forest ecosystems and compare these indicators with control forest area in that area. Data collection was performed from four series (5, 8, 17 and 18) in four elevations of less than 600, 600 to 1000, 1000 to 1500 and more than 1500 meters. In each series, one managed parcel and one control parcel were selected and, in each parcel, 15 sample plots with an area of ​​1000 m2 were conducted. Five samples from each parcel were randomly selected and soil samples were taken. The results showed that the mean of both indices of diameter at breast height and basal area in the control area (32.11 cm, 1158.05 cm2) was higher than the managed area (25.93 cm, 724.94 cm2) and the density of trees in the management area (391/66) is more than the control area (317/50). Also, the average diameter at breast height in the altitude above 1500 is higher than the lower classes. It was observed that forest management by single selection method did not have a significant effect on any of the studied soil indices but elevation factor has a significant effect on all soil characteristics. The present study showed that conducting single-tree selection method improved quantitative and qualitative characteristics of the forest stands.

کلیدواژه‌ها [English]

  • Control
  • Forest management‎
  • Elevation
  • Single-tree selection
  • Soil indices
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