Evaluation of the stocking size-structure and species composition of kapur forest and SERAYA-RIDGE Forest: its implication to current timber management practices

Abd. Rahman Kassim, . and Ismail Harun, . and Shamsudin Ibrahim, . and Mohd. Ridza Awang, . (2004) Evaluation of the stocking size-structure and species composition of kapur forest and SERAYA-RIDGE Forest: its implication to current timber management practices. [Proceedings Paper]

Under the Selective Management SystemSMS the residual trees after logging should meet certain minimum stocking standards required if the area is to be permitted for sustainable harvesting. The two minimum stocking standards required are 32 potential crop trees per hectare of 30-45cm dbh and/or its equivalence ratio and equal or higher proportion of Dipterocarps greater than 30cm dbh after logging compared to before logging. Another factor being considered is the economic cut of 28 m3ha-1. A ten percent pre-felling inventory using a systematic-line plot design and different sampling intensities for various size-class of trees were used to prescribe the cutting limits after taking into account the minimum stocking standards and economic cut. The minimum stocking standards have been uniformly applied to inland mix dipterocarp forest. However in unique and high timber stocking forest types such as Kapur and Seraya-Ridge Forests the requirement of minimum stocking standards had not been successfully met in many cases. In this study an evaluation of growing stock in terms of stocking density size-structure and species composition of these unique forests has been undertaken.Several selective cutting regimes and their affects on the residual stand density and species composition have also been evaluated. This paper reports the results of this evaluation and proposes harvesting regimes by taking into consideration the level of growing stock before and after logging for these two unique forests.

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Abstract

Under the Selective Management SystemSMS the residual trees after logging should meet certain minimum stocking standards required if the area is to be permitted for sustainable harvesting. The two minimum stocking standards required are 32 potential crop trees per hectare of 30-45cm dbh and/or its equivalence ratio and equal or higher proportion of Dipterocarps greater than 30cm dbh after logging compared to before logging. Another factor being considered is the economic cut of 28 m3ha-1. A ten percent pre-felling inventory using a systematic-line plot design and different sampling intensities for various size-class of trees were used to prescribe the cutting limits after taking into account the minimum stocking standards and economic cut. The minimum stocking standards have been uniformly applied to inland mix dipterocarp forest. However in unique and high timber stocking forest types such as Kapur and Seraya-Ridge Forests the requirement of minimum stocking standards had not been successfully met in many cases. In this study an evaluation of growing stock in terms of stocking density size-structure and species composition of these unique forests has been undertaken.Several selective cutting regimes and their affects on the residual stand density and species composition have also been evaluated. This paper reports the results of this evaluation and proposes harvesting regimes by taking into consideration the level of growing stock before and after logging for these two unique forests.

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Item Type:	Proceedings Paper
Additional Information:	6 ills. 10 tables. 17 refs.
AGROVOC Term:	FORESTRY
AGROVOC Term:	STOCKING DENSITY
AGROVOC Term:	DIPTEROCARPACEAE
AGROVOC Term:	SILVICULTURE
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/16623

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