Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007
The future long-term timber supply from sustainably managed forest in Peninsular Malaysia is largely dependent on the availability of timber from the productive Permanent Forest Estate (PFE) especially from the Hill Dipterocarp Forests. Future log supply also will come from the second and succes...
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| Format: | Thesis |
| Language: | English English |
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2007
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| Online Access: | http://psasir.upm.edu.my/id/eprint/6104/1/FH_2007_1.pdf |
| _version_ | 1796967097487589376 |
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| author | Nobilly, Frisco |
| author_facet | Nobilly, Frisco |
| author_sort | Nobilly, Frisco |
| collection | UPM |
| description | The future long-term timber supply from sustainably managed forest in
Peninsular Malaysia is largely dependent on the availability of timber from the
productive Permanent Forest Estate (PFE) especially from the Hill
Dipterocarp Forests. Future log supply also will come from the second and
successive harvest in logged-over forest. Specific information on behaviours
of particular forest stand pertaining to growth performance, mortality, density,
structure and species composition is required to evaluate the management
systems and its suitability under different forests types.
The study was conducted in a logged over Hill Dipterocarps Forest in Angsi
Forest Reserve, Negeri Sembilan with the objective to evaluate the growth
response five years after harvesting. The data consist of five annual
measurements (2000-05) collected from four I-ha permanent sample plots.
The data were analysed in terms of diameter increments, basal areas, tree
volumes and also growth projection using existing growth and yield model.
The results show pattern and trend of tree growth five years after logging. The
stocking of trees, basal area and volume for both trees over 5 and 30 cm dbh
were significantly -different ( ~ ~ 0 . 0 5a)m ong plots, species groups and
measurement years. The ANOVA also showed that the interaction between
species groups, study plots and measurement years were also significant
(~~0.05).
Stocking of trees for both over 5 and 30 cm dbh showed an increment over
the measurement period. However, the overall increment rates of all trees
over 30 cm dbh were relatively low, when compared to the rates assumed
under the Selective Management System (SMS). The overall diameter
periodic annual increment (DPAI) of 0.65 cm tree-' yr-' for all trees over 30 cm
dbh is considerably lower than the rate of 0.8 to 1.0 cm tree-' yr-' assumed
under the SMS. Although the DPAI of the dipterocarps was higher than the
non-dipterocarps, their overall contributions to forest growth was small due to
their lower stocking in the residual stand. The overall mean annual mortality
(3.51%) of all trees over 30 cm dbh for 5-year period was higher than that
assumed under the SMS (0.9%). Based on these growth rates, anticipating a
second cut in 25 to 30 years as stipulated under SMS, would not be
applicable for this area. Therefore, future research on behaviour of the forest
should be conducted.
Based on projection of growth and yield model until year 60 indicates that
growth in timber, basal area and the number of stems per hectare is
increasing each period until end of the projection period (year 60) at slower
state. This shows that the study areas will experience long growth period due
to high density of trees in lower diameter class. |
| first_indexed | 2024-03-06T07:08:55Z |
| format | Thesis |
| id | upm.eprints-6104 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:08:55Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | upm.eprints-61042023-10-09T02:42:50Z http://psasir.upm.edu.my/id/eprint/6104/ Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 Nobilly, Frisco The future long-term timber supply from sustainably managed forest in Peninsular Malaysia is largely dependent on the availability of timber from the productive Permanent Forest Estate (PFE) especially from the Hill Dipterocarp Forests. Future log supply also will come from the second and successive harvest in logged-over forest. Specific information on behaviours of particular forest stand pertaining to growth performance, mortality, density, structure and species composition is required to evaluate the management systems and its suitability under different forests types. The study was conducted in a logged over Hill Dipterocarps Forest in Angsi Forest Reserve, Negeri Sembilan with the objective to evaluate the growth response five years after harvesting. The data consist of five annual measurements (2000-05) collected from four I-ha permanent sample plots. The data were analysed in terms of diameter increments, basal areas, tree volumes and also growth projection using existing growth and yield model. The results show pattern and trend of tree growth five years after logging. The stocking of trees, basal area and volume for both trees over 5 and 30 cm dbh were significantly -different ( ~ ~ 0 . 0 5a)m ong plots, species groups and measurement years. The ANOVA also showed that the interaction between species groups, study plots and measurement years were also significant (~~0.05). Stocking of trees for both over 5 and 30 cm dbh showed an increment over the measurement period. However, the overall increment rates of all trees over 30 cm dbh were relatively low, when compared to the rates assumed under the Selective Management System (SMS). The overall diameter periodic annual increment (DPAI) of 0.65 cm tree-' yr-' for all trees over 30 cm dbh is considerably lower than the rate of 0.8 to 1.0 cm tree-' yr-' assumed under the SMS. Although the DPAI of the dipterocarps was higher than the non-dipterocarps, their overall contributions to forest growth was small due to their lower stocking in the residual stand. The overall mean annual mortality (3.51%) of all trees over 30 cm dbh for 5-year period was higher than that assumed under the SMS (0.9%). Based on these growth rates, anticipating a second cut in 25 to 30 years as stipulated under SMS, would not be applicable for this area. Therefore, future research on behaviour of the forest should be conducted. Based on projection of growth and yield model until year 60 indicates that growth in timber, basal area and the number of stems per hectare is increasing each period until end of the projection period (year 60) at slower state. This shows that the study areas will experience long growth period due to high density of trees in lower diameter class. 2007-04 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/6104/1/FH_2007_1.pdf Nobilly, Frisco (2007) Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007. Masters thesis, Universiti Putra Malaysia. Dipterocarpaceae - Negeri Sembilan - Angsi Forest Reserve - Case studies English |
| spellingShingle | Dipterocarpaceae - Negeri Sembilan - Angsi Forest Reserve - Case studies Nobilly, Frisco Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title | Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title_full | Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title_fullStr | Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title_full_unstemmed | Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title_short | Growth Performance of Hill Dipterocarp Forests Five Years after Harvesting at the Angsi Forest Reserve, Negeri Sembilan, Malaysia, 2007 |
| title_sort | growth performance of hill dipterocarp forests five years after harvesting at the angsi forest reserve negeri sembilan malaysia 2007 |
| topic | Dipterocarpaceae - Negeri Sembilan - Angsi Forest Reserve - Case studies |
| url | http://psasir.upm.edu.my/id/eprint/6104/1/FH_2007_1.pdf |
| work_keys_str_mv | AT nobillyfrisco growthperformanceofhilldipterocarpforestsfiveyearsafterharvestingattheangsiforestreservenegerisembilanmalaysia2007 |