Growth characteristics of hybrid acacia clones planted at Xuan Loc district, Dong Nai province

Abstract

Acacia hybrid is a fast growing species, it has many advantages of high adaptability, fast growth and good soil improvement. Growth characteristics
of acacia hybrid clones, including AH1, AH7, BV32, BV33, KL2, KL20 and BV32, BV33, planted in 2011 at Xuan Loc district, Dong Nai province with three plant density treatments 1660 trees/ha and 2220 tr ees/ha, 3330 trees/ha planted. Results showed that productivity of acacia clones are ranging from 30 m3/ha/year to 34.6 m3/ha/ year. Specifically, BV32 clone is 31.7 m3/ha/year, BV33 clone is 30 m3/ha/year, AH1 clone is 34.6 m3/ha/year, AH7 clone is 31.3m3/ha/year, KL2 clone is 30.2 m3/ha/year and KL20 clone is 32.3 m3/ha/year. From the results of the evaluation of the diameter, height, productivities of acacia hybrid clones, trunk quality and referring to other related researches. The study recommends that acacia hybrid clones of AH1 and AH7 are suitable to plant at Xuan Loc district, these clones meet business production purposes of both sawn timber and wood materials. Productivities of acacia hybrid clones BV32, BV33 planted with three density treatments has no significant differences, as follows: the treatments of 1660 trees/ha and 2220 trees/ha reached 31.9 m3/ha/years, and the treatment of 3330 trees/ha reached 32.1 m3/ha/year. As results the density treatment of 1660 trees/ha is the best at Xuan Loc district