NGHIÊN CỨU ẢNH HƯỞNG CỦA PHÂN BÓN ĐẾN SINH KHỐI  RỄ CÁM RỪNG TRỒNG KEO TAI TƯỢNG (Acacia mangiumWilld)  TẠI QUẢNG NINH

Nguyen Toan Thang; Tran Van Do; Vu Tien Lam; Nguyen Huu Thinh; Tran Hoang Quy; Dao Trung Duc; Vo Dai Nguyen; Phung Dinh Trung; Nguyen Trong Minh

Authors

Nguyen Toan Thang Viện Nghiên cứu Lâm sinh
Tran Van Do Viện Nghiên cứu Lâm sinh
Vu Tien Lam Viện Nghiên cứu Lâm sinh
Nguyen Huu Thinh Viện Nghiên cứu Lâm sinh
Tran Hoang Quy Viện Nghiên cứu Lâm sinh
Dao Trung Duc Viện Nghiên cứu Lâm sinh
Vo Dai Nguyen Viện Nghiên cứu Lâm sinh
Phung Dinh Trung Công ty TNHH Tư vấn & Phát triển Đồng Xanh
Nguyen Trong Minh Trường Đại học Lâm nghiệp

Keywords:

Acacia mangiumplantation, fertilization, fine root, mass-balanced model,, production.

Abstract

Roots (diameter ≤ 2 mm) of forest trees are known as fine roots. Such roots
absorb water and nutrients to sustain tree’s life and play an important role
in carbon cycle and soil nutrient in forest ecosystem. Study in a 2-year-old
plantation of Acacia mangiumWilld in Quang Ninh province indicated that
fertilization increases fine root production. In control (without fertilization)
fine root production was 707.86 g/(m
2.year), increasing to 972.86 (g/m
2
.year)
in fertilizing 400 g P
2O5(16.5%) + 100 g K
2
O (60%)/tree (CT400) and to
1,252.88 (g/m
2
.year) in fertilizing 600 g P
2O5+ 100 g K2
O/tree (CT600). In
growing season/summer, fine root production achieved 60.2% annual fine
root production in control, reducing to 61.9% in CT400 and to 52.4% in
CT600. It is concluded that fertilization plays an important role in forest
plantation carbon cycle, increasing carbon sequestration and soil carbon
sink, contributing to reducing global warming and climate change

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