Abstract
Pinus merkusii Jungh et de Vriese is a plant with high market and economic values due to providing a variety of products, including wood. Good management is needed to preserve pine forest products. The first step toward effective forest management is developing a management plan based on estimated stock data. The volume table used has a significant impact on the accuracy of the stock potential estimate. This study aims to determine the best equation model for compiling a local volume table for P. merkusii Jungh et de Vriese in Tana Toraja Regency. The research was conducted at the community pine forest in Gandang Batu Sillanan and Mengkendek districts, Toraja Regency. The number of sample measured was 100 trees. An analytical method was used to calculate the amount of tree volume on allometric equations. The equation for the stem volume was made using the allometric equation. The research results showed that diameters' mean, standard deviation, and sampling error values were 28.34 cm, 7.39 cm, and 1.45, respectively, heights were 23.77 m, 7.37 m, and 1.44; volume was 1.44 m3, 0.96 m3, and 0.19. The regression equation modelling showed that the best equation model for estimating volume P. merkusii Jungh et de Vriese based on height and diameter was 𝑉=𝑎𝐷2𝐻.
Highlights
Pine (Pinus merkusii Jungh et de Vriese) is a popular plant that plays an important role in Indonesia (Sadili, 2015)
These findings suggest that using the Smalian equation to compute volume is quite accurate, as it yields a sampling error value of 0.19, which is lower than the results of Fernández et al (2017)
The maximum number of errors utilizing the Smalian formula for n = 30 is 5%, and this error value will decrease as the number of samples investigated increases
Summary
Pine (Pinus merkusii Jungh et de Vriese) is a popular plant that plays an important role in Indonesia (Sadili, 2015). Owing to the high commercial value of pine, it is widely planted in a variety of land uses, such as on Sulawesi Island (Imanuddin et al, 2020). According to Cahyono (2011) & Sallata (2013), pine has durable class IV and strong class V wood, and is the only species that grows naturally in Indonesia, including Tana Toraja Regency. Our previous studies (Hardjanto & Patabang, 2019) in Tana Toraja indicates that community forests cover an area of 12510 ha in the Tana Toraja, with the largest pine area being 2702 ha in the Mengkendek District. The Pine forest in Tana Toraja's community forest exists as a result of reforestation efforts initiated in the 1940s by
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