Abstract
The impacts of site quality and fertilization on the growths of acacia plantation have
become important in plantation management. It could provide information on which
site and how much fertilizer should be applied, contributing to sustainable plantation
management. In this study, two sites of different conditions of soil depths (30-40
cm/shallow soil site and 70-80 cm/deep soil site) and of rock contents (< 10% and >
45%); and fertilizing 200 g NPK (16:16:8)/tree/year and control (non-fertilization) were
experimented in an Acacia mangium plantation in northeast Vietnam. The plantation
was established in September 2017, fertilizer was applied in Junes 2018 and 2019. Site
conditions and fertilization significantly affected the growths of 2-year-old plantation.
In shallow soil site, the plantation in fertilization treatment achieved 498% basal area
and 595% aboveground biomass of plantation in non-fertilization treatment. The
difference among control and fertilizing 200 g NPK/tree in deep soil site, and fertilizing
200 g NPK/tree in shallow soil site was not significant. It is concluded that fertilizing
NPK to acacia plantation in the present study site is necessary for shallow soil site even
trees become older, while in deep soil site fertilization is required only in the first year
to support initial growths.
Tran Van Do. (2020) Acacia plantation in different quality sites and fertilization in Northeast Vietnam, Asian Journal of Agriculture and Biology, Volume 8, Issue 3.
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