Volume estimation of standing shorea sp. at UPM-Jise rehabilitation project, Bukit Nyabau Bintulu

Mokhsen Abdullah, Izyan Alwani (2008) Volume estimation of standing shorea sp. at UPM-Jise rehabilitation project, Bukit Nyabau Bintulu. [Project Paper] (Submitted)

Text lp FSPM 2008 20.pdf Download (2MB)

Abstract

This study is to analyze the relationship between diameter at breast height (dbh), height, and volume of standing Shorea sp. and the relationship between age and volume of this species. The study was conducted at phase 2 and 4, UPM -JISE joint rehabilitation project, Bukit Nyabau Forest where the measurement was taken from tree stand year 1992 until 2003. There were three stages involved in this research, first stage was building a one sampling plot of 20 x 20m (0.04 ha) for each age of stand. Then second stage was the measurement and data collection within each plot. Ten standing Shorea sp. were randomly measured sectionals (taper) 20cm up and down from diameter at breast height (dbh) for 1995-2003 stand while 2m sectionals for 1992 stand. The rest of the trees within the plot were only measured by dbh. All the collected data was calculated to find basal area of each tree in meter square (m2) and volume sectionals in meter cubic (m3). The volume was calculated using the Smalian's formula to find the taper volume of ten Shorea sp. Regression analysis was conducted to find the regression equation which could explain relation between volume, diameter, and height of the tree. Result showed that there has been a relationship between the volume diameter and height of a tree. By using the regression equation we could find the whole volume of a tree by only measure a dbh on the ground. Another relation was between volume taper of standing tree and age where there was no significant different between them. This means that volume taper of standing tree and ages were not correlated. While as for relationship between regression volume and age shows significance different, which means they both were correlated to each other.

Item Type:	Project Paper
Subjects:	S Agriculture > SD Forestry
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Mr. Azman Mohamad
Date Deposited:	10 Jun 2025 01:31
Last Modified:	10 Jun 2025 01:31
URI:	http://psaspb.upm.edu.my/id/eprint/2330

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