Potential exotic species for establishing planted forests

Harwood C.E., . (1998) Potential exotic species for establishing planted forests. [Proceedings Paper]

Sarawaks tropical climate differs from climates of most SE Asia including some other parts of Borneo because of its high year-round rain for and humidity. Many plantation tree species such as tropical Eucalyptus and Pinus species perform poorly in climates which lack a dry season and are therefore not suitable for planting in Sarawak. The very acid infertile soils typically available in Sarawak further restrict the choice of suitable plantation species. Even the most promising candidate species such as the fast-growing tropical acacias may experience disease problems arising from Sarawaks particular environmental conditions. A review of species for Sarawaks conditions suggests that the tropical acacias in particular Acacia mangium A. crassicarpa and the hybrid between mangium and A. auriculiformis and Paraserianthes falcataria are the most promising candidates for short rotation plantation forestry. Experience with A. mangium in Sarawak suggest that over-bark volume yields of arround 20-25 per year over an 8-year pulpwood rotation are feasible on the better available soil types such as red-yellow podzolics using best available seed sources and good silvicultural practices. Summary data on candidate plantation species and sources of further information are given. Some other candidate species such as teak mahogany and Gmelina arborea are most sensitive to shallow acid infertile soils and unlikely to grow fast enough to be an attractive investment. Clonal forestry offers the opportunity to tailor wood product more closely to industrys needs and will be necessary for hybrids such as the Acacia hybrid for this species with recalcitrant seeds. It requires additional field testing and higher levels of technical skill than does seed-based production of planting stock. The sequent of species elimination trials provenance trial and species proving and silvicultural trials that are required to identify confirm and developed promising species is described. Detailed side surveys are recommended to enable matching of species to particular side types and to locate platation where they will achieve good productivity. Regardless of which species is selected carefull maintenance of side quality is essential to sustain high wood yields over repeated short rotations.

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Abstract

Sarawaks tropical climate differs from climates of most SE Asia including some other parts of Borneo because of its high year-round rain for and humidity. Many plantation tree species such as tropical Eucalyptus and Pinus species perform poorly in climates which lack a dry season and are therefore not suitable for planting in Sarawak. The very acid infertile soils typically available in Sarawak further restrict the choice of suitable plantation species. Even the most promising candidate species such as the fast-growing tropical acacias may experience disease problems arising from Sarawaks particular environmental conditions. A review of species for Sarawaks conditions suggests that the tropical acacias in particular Acacia mangium A. crassicarpa and the hybrid between mangium and A. auriculiformis and Paraserianthes falcataria are the most promising candidates for short rotation plantation forestry. Experience with A. mangium in Sarawak suggest that over-bark volume yields of arround 20-25 per year over an 8-year pulpwood rotation are feasible on the better available soil types such as red-yellow podzolics using best available seed sources and good silvicultural practices. Summary data on candidate plantation species and sources of further information are given. Some other candidate species such as teak mahogany and Gmelina arborea are most sensitive to shallow acid infertile soils and unlikely to grow fast enough to be an attractive investment. Clonal forestry offers the opportunity to tailor wood product more closely to industrys needs and will be necessary for hybrids such as the Acacia hybrid for this species with recalcitrant seeds. It requires additional field testing and higher levels of technical skill than does seed-based production of planting stock. The sequent of species elimination trials provenance trial and species proving and silvicultural trials that are required to identify confirm and developed promising species is described. Detailed side surveys are recommended to enable matching of species to particular side types and to locate platation where they will achieve good productivity. Regardless of which species is selected carefull maintenance of side quality is essential to sustain high wood yields over repeated short rotations.

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Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	FOREST PLANTATIONS
AGROVOC Term:	FOREST PRODUCTS INDUSTRY
AGROVOC Term:	FOREST TREES
AGROVOC Term:	FOREST PROTECTION
AGROVOC Term:	SARAWAK
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16724

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