The silviculture of dipterocarp trees in Sarawak Malaysia 4: Seedling establishment and adult regeneration in a selectively logged forest and three primary forests

Primack R.B., . and Hall P., . and Lee H.S., . The silviculture of dipterocarp trees in Sarawak Malaysia 4: Seedling establishment and adult regeneration in a selectively logged forest and three primary forests. pp. 162-178. ISSN 0302-2935

A mixed dipterocarp forest near Niah in Sarawak was selectively logged in 1973-74 and given four different silvicultural treatments (three intensities of Liberation Thinning and Removal of Relicts) in order to increase the growth rate of selected remaining trees of commercial species in comparison with trees in control plots which were also selectively logged. A total of 1795 seedling and sapling quadrats were established in 1978 to monitor regeneration in the forest. In general the number of dipterocarp seedlings and samplings appear to be sufficient to produce a future crop of trees. For Red meranti there is always 1.9 to 4.5 times as many saplings as adult trees and there are 5.6 to 19.4 times as many seedlings as adults depending on the treatment and the year. These ratios are much lower than in primary forest suggesting that logging operations and associated altered forest conditions have considerable destructive effects on existing dipterocarp seedlings and saplings. In most logged plots the number of seedlings saplings and adults is increasing over time showing that dipterocarp regeneration in successful. Separating treatment and site effects is problematic due to the experimental design. However it appears that moderate silvicultural treatments do not adversely affect seedling establishment and adult regeneration in comparison with the control plot.

Full text available from:

Abstract

A mixed dipterocarp forest near Niah in Sarawak was selectively logged in 1973-74 and given four different silvicultural treatments (three intensities of Liberation Thinning and Removal of Relicts) in order to increase the growth rate of selected remaining trees of commercial species in comparison with trees in control plots which were also selectively logged. A total of 1795 seedling and sapling quadrats were established in 1978 to monitor regeneration in the forest. In general the number of dipterocarp seedlings and samplings appear to be sufficient to produce a future crop of trees. For Red meranti there is always 1.9 to 4.5 times as many saplings as adult trees and there are 5.6 to 19.4 times as many seedlings as adults depending on the treatment and the year. These ratios are much lower than in primary forest suggesting that logging operations and associated altered forest conditions have considerable destructive effects on existing dipterocarp seedlings and saplings. In most logged plots the number of seedlings saplings and adults is increasing over time showing that dipterocarp regeneration in successful. Separating treatment and site effects is problematic due to the experimental design. However it appears that moderate silvicultural treatments do not adversely affect seedling establishment and adult regeneration in comparison with the control plot.

[error in script]

Item Type:	Article
Additional Information:	1 ill.; 6 tables; 18 ref. Summary (En)
AGROVOC Term:	DRYOBALANOPS
AGROVOC Term:	DIPTEROCARPUS
AGROVOC Term:	SHOREA
AGROVOC Term:	SARAWAK/ HOPEA
AGROVOC Term:	INDICE DE CRECIMIENTO
AGROVOC Term:	PLANTULAS
AGROVOC Term:	REGENERACION NATURAL
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:55
URI:	http://webagris.upm.edu.my/id/eprint/20188

Actions (login required)

View Item