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All Journal Agromet Indonesian Journal of Forestry Research
Rahaju, Sri
Department Of Forest Management, Faculty Of Forestry And Environment, IPB University
Agriculture, Biological Sciences & Forestry

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KAJIAN PEROLEHAN KARBON SEBAGAI DAMPAK INTERVENSI KASUS: EKS-PLG BLOK A, MENTANGAI, KALIMANTAN TENGAH(CARBON RESULT STUDY AS INTERVENTION IMPACT, CASE: EKS-PLG BLOCK A, MENTANGAI, CENTRAL BORNEO) Sri Rahaju; . Istomo
Agromet Vol. 22 No. 1 (2008): June 2008
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (212.924 KB) | DOI: 10.29244/j.agromet.22.1.%p

Abstract

CCFPI is project activity on “Climate Change, Forests and Peatlands in Indonesia” funded by the “Canadian International Development Agency” (CIDA) through Climate Change and Development Fund, Canada. This project is designed to increase sustainable management of forests and peatlands in Indonesia in order to increase the capacity in carbon sequestration and also better of community incomes. One of project location in Kalimantan is area Ex-PLG Blok A, Mentangai, Central Kalimantan. This article present study on total value carbon gained as impact from various interventions in location of CCFPI project activity in area Ex-PLG Blok A, Mentangai. Method of estimation on carbon stock is conducted by Sample Plot of Measurement (PCP). Calculation of carbon stock with equation of alometrik which is present in Field Guidance to Estimate Carbon Stock on Peatland (Murdiyarso et.al., 2004). Activity of cannal blocking by CCFPI project has result to the positive impacts to the reduction rate of carbon both for above and below ground carbon as well as carbon content by tree plantation established by the community inside the areas of around 43,451 ha. Based on result of calculation, the amount of above ground carbon stock obtained 14,448 ton C. Carbon stock found in the trees plantation in surrounding the cannal 0.777 ton C. Below ground carbon stock is ranged between 550,782 ton C up to 2,223,424 ton C.
FORM FACTORS AND VOLUME MODELS FOR ESTIMATING TREE BOLE VOLUME OF MAHOGANY AT COMMUNITY FORESTS IN CENTRAL JAVA Tatang Tiryana; Lailatul Khasanah; Priyanto Priyanto; Sri Rahaju; Muhdin Muhdin
Indonesian Journal of Forestry Research Vol 8, No 2 (2021): Indonesian Journal of Forestry Research
Publisher : Secretariat of Agency for Standardization of Environment and Forestry Instruments

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2021.8.2.199-211

Abstract

Form factors and volume models are often be used in the estimation of tree volumes. However, a few studies have developed and evaluated the accuracy of form factors and volume models for estimating tree volumes of community forests. This study aimed to formulate form factors and volume models and assess their prediction accuracy for estimating tree bole volumes of mahogany at community forests in Central Java. This study used 120 sample trees with diameters of 6–38 cm to formulate artificial and absolute form factors and to develop tree bole volume models. These form factors coupled with bole height and total height were used in simple volume equations. Regression analyses were used to develop volume models using the diameter and total height as predictors. The simple volume equations and volume models' prediction accuracy was evaluated using a cross-validation dataset and independent dataset (30 sample trees). The artificial form factor (0.68 ± 0.11) of mahogany, which was higher than the absolute form factor (0.46 ± 0.09), provided accurate estimates of tree bole volumes when it was used with the bole height instead of the total height. The volume model that uses diameter and total height produced the most accurate estimates, while the volume model that uses diameter alone provided the most practical yet reliable tool for estimating tree bole volumes of mahogany. The results of this study are useful for improving community forest management.
Co-Authors Istomo . Lailatul Khasanah Muhdin Muhdin Priyanto Tatang Tiryana