Effects of planting materials on tree growth, productivity and quality of the acacia hybrid plantation in Dong Phu - Binh Phu

Abstract

This study was conducted to understand the impact of planting materials (tissue culture plantlet and rooted cutting from different ages and cutting positions of hedge orchard) to tree growth, productivity and quality of the acacia hybrid plantation. A trial in Dong Phu - Binh Phuoc had a factorial combination of clones (AH1, BV10), tissue culture plantlet, rooted cutting from age two and age four years and cutting branche positions (sun -facing direction and horisontal direction). The early results showed that at 36 months after planting there were no significant differences between tissue culture plantlet, sun-facing direction rooted cutting from age two years in stand productivity and quality except disease tolerance of tissue culture plantlet was greater than rooted cutting. Rooted cutting from age two years of hedge orchard significantly increased tree growth, productivity and quality of plantations that compared to its four years of hedge orchard. Tree growth, productivity and quality of plantations by using sun-facing direction rooted cutting was significantly higher than that of using horisontal direction branches. Plantation productivity of clone BV10 was significantly greater than its clone AH7 but plantation quality of clone BV10 was significantly lower than AH7 due to number of diameter branches ≥ 2 cm in BV10 was higher than that of AH7. It suggests that when planting acacia hybrid with high scale we should use sun-facing direction rooted cutting from age two years of hedge orchard rather use tissue culture plantlet material and age of hedge orchards has no more than three years of