An Estimate of Primary Productivity in Air Hitam Forest Reserve
Natural forest is a mosaic of structural phases. Different growth stages have different productivity level. The main objective of this study is to estimate the net primary productivity (NPP) of three different growth stages in Air Hitam Forest Reserve by using the summation method. The first stu...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2000
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10029/ http://psasir.upm.edu.my/id/eprint/10029/1/FH_2000_12_IR.pdf |
| Summary: | Natural forest is a mosaic of structural phases. Different growth stages have different
productivity level. The main objective of this study is to estimate the net primary
productivity (NPP) of three different growth stages in Air Hitam Forest Reserve by
using the summation method.
The first study area is a more mature and diverse stand (Biodiversity Plot, BP). The
second (Macaranga Plot I, MPI) and third study (Macaranga Plot II, MPII) areas are
younger and more homogenous stands.
Trees in Diameter Class 10-20 em dominated all the study plots accounting for
between 56 and 78 % of all the trees in the plots. The basal area for BP was 21.1
m2/ha, in MPI was 27.9 m2/ha and MPH was 19.7 m2/ha. The most common species
in BP was Eugenia griffithii while in MPI and MPH it was Macaranga gigantea.
A modified equation was derived from Acacia mangium biomass equations and
Kato's et al. (1978) equation. The total biomass estimated was 201.7 t/ha in BP, 273.6 t/ha in MPI and 15l.8 t/ha in MPH. Biomass was estimated over two
consecutive occasions. The estimated annual biomass increment (∆Y) was 0.8 t/ha/yr
in BP, 1.3 t/ha/yr in MPI and 2.0 t/ha/yr in MPII. |
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