The silviculture of dipterocarp trees in Sarawak Malaysia 1: Introduction to the series and performance in primary forest

Primack R.B., . and Chai E.O.K., . and Tan S.S., . and Lee H.S., . The silviculture of dipterocarp trees in Sarawak Malaysia 1: Introduction to the series and performance in primary forest. pp. 29-42. ISSN 0302-2935

This paper begins a series evaluating the performance of dipterocarp trees in primary forest logged forest silviculturally treated forest and plantation forest. The goal is to determine which system is the best for long-term sustained yield of dipterocarp timber in Sarawak Malaysia. This first paper described fifteen years of growth studies of trees growing in three primary forest sites at Bako National Park Lambir National Park and Bukit Mersing. Mean annual diameter increments do not parallel the gradient in soil fertility. Particular timber groups cannot be characterized as fast-growing or slow-growing due to the complexity of species-site interactions. Substantial differences in growth rates occur among species of the meranti group growing in the same forest. The five fastest growing individual trees per population have growth rates of about 1.0 cm/year over the fifteen-year period. For individual trees growth rates may exceed 2.0 cm/year for a single five-year period. Large trees grow two to three times faster than small trees. Annual mortality rates are mainly around 1 to 2 percent indicating stable populations. If the fastest trees eventually become the largest trees in the forest trees of commercial size (45 cm d.b.h.) can potentially be produced in about 45 years from seed and in about 25 years from existing small trees (20 cm d.b.h.)

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Abstract

This paper begins a series evaluating the performance of dipterocarp trees in primary forest logged forest silviculturally treated forest and plantation forest. The goal is to determine which system is the best for long-term sustained yield of dipterocarp timber in Sarawak Malaysia. This first paper described fifteen years of growth studies of trees growing in three primary forest sites at Bako National Park Lambir National Park and Bukit Mersing. Mean annual diameter increments do not parallel the gradient in soil fertility. Particular timber groups cannot be characterized as fast-growing or slow-growing due to the complexity of species-site interactions. Substantial differences in growth rates occur among species of the meranti group growing in the same forest. The five fastest growing individual trees per population have growth rates of about 1.0 cm/year over the fifteen-year period. For individual trees growth rates may exceed 2.0 cm/year for a single five-year period. Large trees grow two to three times faster than small trees. Annual mortality rates are mainly around 1 to 2 percent indicating stable populations. If the fastest trees eventually become the largest trees in the forest trees of commercial size (45 cm d.b.h.) can potentially be produced in about 45 years from seed and in about 25 years from existing small trees (20 cm d.b.h.)

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Item Type:	Article
Additional Information:	7 tables; 17 ref. Summary (En)
AGROVOC Term:	DIPTEROCARPUS
AGROVOC Term:	DRYOBALANOPS
AGROVOC Term:	HOPEA
AGROVOC Term:	SARAWAK/ PARASHOREA
AGROVOC Term:	SHOREA
AGROVOC Term:	DIAMETRO
AGROVOC Term:	DESEMPENO
AGROVOC Term:	TIERRAS FORESTALES
AGROVOC Term:	INDICE DE CRECIMIENTO
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:55
URI:	http://webagris.upm.edu.my/id/eprint/20158

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