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All Journal MAKILA: Jurnal Penelitian Kehutanan Indonesian Journal of Forestry Research
Utomo, Singgih
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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POLA TANAM DAN SISTEM SILVIKULTUR PADA SKEMA PERHUTANAN SOSIAL DI KULON PROGO, D.I. YOGYAKARTA Lestari, Puji; Utomo, Singgih; Prasetyo, Eko; Maulana, Ahdiar Fikri; Ngadianto, Agus; Qoyriah, Mufidatul; Lanangjati, Hafiz Satrio; Anggraeni, Cynthia
MAKILA Vol 18 No 1 (2024): Makila: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v18i1.11536

Abstract

Social forestry is a scheme chosen by the government to improve community welfare by providing legal access to communities to manage forests. One of the social forestry schemes implemented in Kulon Progo is Community Forestry. This scheme has great potential to be developed with a multi-use forestry management model. Therefore, a review of the silvicultural aspect is needed to understand the forest management model currently implemented. This research aims to identify tree species, planting patterns and silvicultural systems implemented by Community Forestry at Production Forests in Kulon Progo. The research was conducted from August to October 2023 in Plot 17 and Plot 19 of RPH Kokap, BDH Kulon Progo-Bantul. Observations were made by making measurement plots of 20 m x 40 m of each plot and then recording the name of tree species, coordinates, height, diameter, height without branches, and canopy width. The data were then analyzed using Spatially Explicit Individual-based Forest Simulator (SexI-FS) software version 2.1.0. to see the projected planting pattern. The results of the research showed that tree species planted in the Community Forestry were teak (Tectona grandis), acacia (Acacia mangium), mahogany (Swietenia macrophylla), eucalyptus (Eucalyptus sp.), paperback (Melaleuca leucadendron), and jackfruit (Artocarpus heterophyllus ). These species were planted using a mixed planting pattern with the silviculture system of selective logging with artificial regeneration.
DEVELOPMENT OF LOCAL ALLOMETRIC EQUATION TO ESTIMATE TOTAL ABOVEGROUND BIOMASS IN PAPUA TROPICAL FOREST Maulana, Sandhi I.; Wibisono, Yohannes; Utomo, Singgih
Indonesian Journal of Forestry Research Vol. 3 No. 2 (2016): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2016.3.2.107-118

Abstract

Recently, pantropical allometric equations have been commonly used across the globe to estimate the aboveground biomass of the forests, including in Indonesia. However, in relation to regional differences in diameter, height and wood density, the lack of data measured, particularly from eastern part of Indonesia, may raise the question on accuracy of pantropical allometric in such area. Hence, this paper examines the differences of local allometric equations of Papua Island with equations developed by Chave and his research groups. Measurements of biomass in this study were conducted directly based on weighing and destructive samplings. Results show that the most appropriate local equation to estimate total aboveground biomass in Papua tropical forest is Log(TAGB) = -0.267 + 2.23 Log(DBH) +0.649 Log(WD) (CF=1.013; VIF=1.6; R2= 95%; R2-adj= 95.1%; RMSE= 0.149; P<0.001). This equation is also a better option in comparison to those of previously published pantropical equations with only 6.47% average deviation and 5.37 points of relative bias. This finding implies that the locally developed equation should be a better option to produce more accurate site specific total aboveground biomass estimation.
Co-Authors Cynthia Anggraeni Heni Pujiastuti Lanangjati, Hafiz Satrio Maulana, Ahdiar Fikri Maulana, Sandhi I. Ngadianto, Agus PUJI LESTARI Qoyriah, Mufidatul Yohannes Wibisono