این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Ecopersia، جلد ۴، شماره ۳، صفحات ۱۵۰۵-۱۵۱۶
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی A Practical Linear Model for Estimation of Tree Falling Direction Error in Mountainous Forests of Northern Iran
چکیده انگلیسی مقاله Directional felling of trees plays a key role in reducing of damages to forest residual trees and can also facilitate skidding. The aim of this study was presents a practical linear model for estimation of tree falling direction error in an uneven-aged mixed stand in northern forests of Iran. To conduct the study a number of 95 trees of four species Fagus Orientalis Lipsky, Carpinus Betulus L., Alnus Subcordata C.A. May and Acer Platanoides were randomly selected,and assumed felling direction were marked on the trunk of these trees. The trees felled by experienced chainsaw operators, and the differences between the assumed and actual direction were measured as the felling error. The results showed that among the 12 effective factors, the elements of foot slope, diameter at the breast height (DBH), horizontal and vertical angles and area of the backcut surface (HABS, VABS, BA),vertical angle and area of undercut surface (VAUS, UA) significantly correlated with the felling error, and the determination coefficient (R2) of presented linear model was 52.0 % (P < 0.01). Among the model factors, DBH, VABS, and HABS had the three most pronounce impact on felling error.
کلیدواژه‌های انگلیسی مقاله
نویسندگان مقاله رامین نقدی |
associate professor, department of forestry, faculty of natural resources, university of guilan, sowmeh sara, iran
سازمان اصلی تایید شده: دانشگاه گیلان (Guilan university)

مهرداد نیکوی |
assistant professor, department of forestry, faculty of natural resources, university of guilan, sowmeh sara, iran
سازمان اصلی تایید شده: دانشگاه گیلان (Guilan university)

اسماعیل قاجار |
assistant professor, department of forestry, faculty of natural resources, university of guilan, sowmeh sara, iran
سازمان اصلی تایید شده: دانشگاه گیلان (Guilan university)

مونا ارشادی فر |
m.sc. student, department of forestry, faculty of natural resources, university of guilan, sowmeh sara, iran
سازمان اصلی تایید شده: دانشگاه گیلان (Guilan university)

نشانی اینترنتی http://ecopersia.modares.ac.ir/article_15530_33eae8ce8c6db9472ec547b68c5f494d.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات