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مجله جنگل ایران

Evaluating Timber Volume Discrepancies in Teak Plantations of the Sagarnath Forest Development Project, Nepal: A Comparative Study

نوع مقاله : مقاله پژوهشی

نویسندگان
1 Tribhuvan University, Institute of Forestry, Pokhara Campus, Pokhara.
2 College of Natural Resource Management, Faculty of Forestry, Agriculture and Forestry University, Katari-56310, Udayapur, Nepal.
3 Faculty of Forestry, Agriculture and Forestry University, Hetauda-44107, Nepal.
10.22034/ijf.2025.492785.2023
چکیده
Accurate forest biomass estimation, productivity, yield regulation, and carbon stock rely on precise volume prediction at both the individual tree and stand levels. This study, titled “Comparison of Standing and After-Felled Volume of Timber in Teak Plantation in the Sagarnath Forest Development Project, Nepal,” was conducted in the Sagarnath Forest Development Project (SFDP) in Sarlahi District. The primary objective of this research was to calculate the disparity in timber volume before and after harvesting in a teak forest. The 2D felling site provided 150 sample trees for data collection. Before felling, the diameter at breast height (DBH) of standing trees was measured using a diameter tape, tree height was measured with a range finder, and tree quality class was determined based on community forest inventory guidelines. After felling, the total length of the log, girth at the mid-length of the log, and the length and diameter of hollowness and the depth of the buttress were measured using a measuring tape. To compute timber volume before felling, the formula defined in the Community Forest Resource Inventory Guideline, 2061 was utilized, while the quarter-girth formula was employed to calculate timber volume after felling. The findings indicated an overestimation of 696.80 cubic feet of timber before harvesting. A 95% confidence interval F-test demonstrated a significant difference in timber volume before and after felling. There was a loss of 14.58 cu. ft of timber volume due to hollowness in the tree, and 83.10 cu. ft of timber was lost due to buttresses. Likewise, a difference in volume was observed based on quality class due to inaccurate classification.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Evaluating Timber Volume Discrepancies in Teak Plantations of the Sagarnath Forest Development Project, Nepal: A Comparative Study

نویسندگان English

Anish Baral 1
Rajeev Joshi 2
Santosh Ghimire 3
Aman Prabhakar 2
Pramod Subedi 3
1 Tribhuvan University, Institute of Forestry, Pokhara Campus, Pokhara.
2 College of Natural Resource Management, Faculty of Forestry, Agriculture and Forestry University, Katari-56310, Udayapur, Nepal.
3 Faculty of Forestry, Agriculture and Forestry University, Hetauda-44107, Nepal.
چکیده English

Accurate forest biomass estimation, productivity, yield regulation, and carbon stock rely on precise volume prediction at both the individual tree and stand levels. This study, titled “Comparison of Standing and After-Felled Volume of Timber in Teak Plantation in the Sagarnath Forest Development Project, Nepal,” was conducted in the Sagarnath Forest Development Project (SFDP) in Sarlahi District. The primary objective of this research was to calculate the disparity in timber volume before and after harvesting in a teak forest. The 2D felling site provided 150 sample trees for data collection. Before felling, the diameter at breast height (DBH) of standing trees was measured using a diameter tape, tree height was measured with a range finder, and tree quality class was determined based on community forest inventory guidelines. After felling, the total length of the log, girth at the mid-length of the log, and the length and diameter of hollowness and the depth of the buttress were measured using a measuring tape. To compute timber volume before felling, the formula defined in the Community Forest Resource Inventory Guideline, 2061 was utilized, while the quarter-girth formula was employed to calculate timber volume after felling. The findings indicated an overestimation of 696.80 cubic feet of timber before harvesting. A 95% confidence interval F-test demonstrated a significant difference in timber volume before and after felling. There was a loss of 14.58 cu. ft of timber volume due to hollowness in the tree, and 83.10 cu. ft of timber was lost due to buttresses. Likewise, a difference in volume was observed based on quality class due to inaccurate classification.

کلیدواژه‌ها English

Buttress
Felling
Hollowness
Standing trees
Timber volume
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دوره 17، شماره 4 - شماره پیاپی 4
شماره انگلیسی
زمستان 1404
صفحه 559-569

  • تاریخ دریافت 17 آذر 1403
  • تاریخ بازنگری 23 اردیبهشت 1404
  • تاریخ پذیرش 31 تیر 1404