Fine root production estimation for natural evergreen broadleaved forests in Copia Natural Reserve, Vietnam
Keywords:
Evergreen broadleaved forest, fineroot,, mass-balanced model, productionAbstract
Fine roots ( ≤2mm) function as absorbing water and nutrients to sustain
tree’s life and play an important role in carbon cycle and carbon deposit to
the soil in forest ecosystem. In this study, fine root production, mortality,
and decomposition were estimated for old-growth forest and secondary
forest recovered after 34 years shifting cultivation in Northwestern,
Vietnam. The results indicated that there was 65% and 76.6% fine roots
distributing in 0-20 cm soil surface in old-growth forest and secondary
forest, respectively. Annual fine root production achieved 3.7 tons/ha in
old-growth forest and 1.3 tons/ha in secondary forest, respectively.
Meanwhile, annual fine root mortality was 0.26 tons/ha and 0.12 tons/ha
and annual fine root decomposition was 0.11 ton/ha and 0.04 ton/ha for
old-growth forest and secondary forest, respectively. Fine root production
in evergreen broadleaved forest in northwest, Vietnam in this study was
much lower than that in other forests around the world.
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