Research on volume table establishment of Pinus kesiya in Ha Giang

Abstract

Volume table of Pinus kesiya had been established in the Central
Highland. However, the same species may growth and form different
shape in different ecological regions. Therefore application of the
established table in other ecological regions needs to calibrate or establish
newly one for approximating. Ha Giang province located in the North, in
which Pinus kesiya species are distributed naturally and planted long time,
therefore, it is essential to establish volume table for the species in order to
evaluate forest yield. A new two factor volume table of Pinus kesiya has
been established for Ha Giang province based on 59 analysed trees, of
which 46 trees used to fit the suitable equation and 13 remain trees used to
test them. The equation V = 0,00006439*(D
2
H)
0,942
which has an average
errors of ±10% has been choose to build the volume table. These two
factor volume table has an acceptable error and can be used for calculating
forest yield and volume in Ha Giang province.