Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests

• 作者: Bui Kieu Hung Cao Chi Khiem Dang Thi Hai Ha Dang Thinh Trieu Dang Van Thuyet Dinh Hai Dang Duong Quang Trung Ho Trung Luong Hoang Thanh Son Hoang Thi Nhung Hoang Van Thang Hoang Van Thanh Lai Thanh Hai Le Thi Hanh Mamoru Yamamoto Nguyen Huu Thinh Nguyen Huy Hoang Nguyen Quang Hung Nguyen Thanh Son Nguyen Thi Hoai Anh Nguyen Thi Thu Phuong Nguyen Thi Thuy Huong Nguyen Thi Van Anh Nguyen Toan Thang Nguyen Van Bich Nguyen Van Thinh Nguyen Van Tuan Ninh Viet Khuong Osamu Kozan Pham Dinh Sam Pham Quang Tuyen Pham Tien Dung Phan Minh Quang Phung Dinh Trung Tran Anh Hai Tran Duc Manh Tran Hai Long Tran Hoang Quy Tran Hong Van Tran Van Do Trieu Thai Hung Trinh Ngoc Bon Vo Dai Hai Vu Thanh Nam Vu Tien Lam
• 来源期刊: 林业研究（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 1713-1722
• 页数: 10页
• 语种: 英文

摘要

Biotic and abiotic factors control aboveground biomass (AGB) and the structure of forest ecosystems.This study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 173 1-ha plots from 52 locations in undisturbed old-growth forests was developed.The results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of sunshine.Basal area and AGB are positively correlated with trees ＞ 30 cm DBH.Most areas surveyed (52.6％) in these old-growth forests had AGB of 100-200 Mg ha-1;5.2％ had AGB of 400-500 Mg ha-1,and 0.6％ had AGB of ＞ 800 Mg ha-1.Seventy percent of the areas surveyed had stand densities of 300-600 ind.ha-1,and 64％ had basal areas of 20-40 m2 ha-1.Precipitation is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in Vietnam.Disturbances causing the loss of large-diameter trees (e.g.,＞ 100 cm DBH) affects AGB but may not seriously affect stand density.