Model Alometrik untuk menduga volume pohon berdiri Shorea leprosula Miq, PT Gunung Muro Wahana Jaya
DOI:
https://doi.org/10.31849/forestra.v20i1.24512Keywords:
Diamete, volume estimation, shorea leprosulaAbstract
The potential of timber forest products is usually assessed using ITSP (Inventarisasi Tegakan Sebelum Penebangan) activities. However, ITSP activities require expensive costs and, a long time, and measurement of branch-free height is difficult due to environmental factors such as topography in the field. One way is to create an allometric model of standing tree volume estimation with the independent variable of diameter at breast height. The study used a purposive sampling method and made 19 plots. The measuring plot area is 5 m x 5 m, 10 m x 10 m, 20 m x 20 m. Measurement of diameter at the breast heigh >10 cm and branch-free height. Conduct R2-adj model fit test, residual standard error, F test, and t-test with 0.05 test level. Validation test using NRMSE and MAPE. The result of the study is the best allometric model to estimate the volume of standing trees is the power model Y= 0.001 D2.380, Y as the volume of standing trees and D as the diameter at breast height. The NRMSE validation test value is 1.02% and MAPE is, 0.32% meaning that the power model has excellent estimation capabilities.
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