Abstract
Binuang bini (Octomeles sumatrana Miq) is a fast-growing tree with numerous economic benefits, such as the provision of wood for carpentry purposes, building boards, water management, and absorption of carbon dioxide (CO2). Therefore, this tree species has great potential and needs to be included in Reducing Emission from Deforestation and Forest Degradation (REDD)+'s mitigation program to tackle climate change. In its development, REDD+ has made it possible to carry out carbon trading in the world. Therefore, countries capable of performing protective functions and carry out reforestation, afforestation, and restoration, have the opportunity to be involved in world carbon trading. This study aims to determine the moisture content and carbon absorption rate of Binuang bini trees as a first step to regulate the allometric equation using destructive and laboratory analysis. The results show that the water content in the roots, leaves, as well as the base, middle, and tip of the stem were: 73.69%, 68.39%, 65.59%, 61.22%, and 66.26%, respectively. Furthermore, the sample test results indicate a very close relationship between carbon concentration and absorbance in the O. sumatrana tree with a simple linear regression equation: Y = 0.002X + 0.0593 with R2 = 0.9896. Therefore, this regression equation can be used to calculate the carbon concentration sample for the O. sumatrana tree fraction. The carbon content in 3 tree samples with a breast height diameter of 9.24 cm, 10.08 cm, and 11.68 cm was 2,585 kg. 2,913 kg, and 4,654 kg, respectively. In addition, the carbon sequestration for each tree diameter per year is 1.581 kg year-1, 1,782 kg year-1and 2,847 kg year-1, respectively.
Highlights
A forest is a large land area dominated by a collection of trees, with different microclimate and vegetation characteristics from its outside of area
Many forests in the world are damaged due to degradation and deforestation (Zhang et al, 2016). These damages lead to climate change, which is characterized by the emergence of global warming due to the effects of greenhouse gases such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCS), perfluorocarbons (PFCS), and sulfur hexafluoride (SF6) in the atmosphere
Water content, and specific gravity were analyzed at the Mathematics and Natural Science (MIPA) Laboratory of the University of Halmahera (UNIERA) Tobelo, while the carbon testing using the spectrophotometry method was analyzed at the MIPA Laboratory of the University of Pattimura (UNPATTI) Ambon
Summary
A forest is a large land area dominated by a collection of trees, with different microclimate and vegetation characteristics from its outside of area. Mitigation activities are inseparable from the Reducing Emission from Deforestation and Forest Degradation (REDD+) program This program is based on respecting individuals, communities, projects, and countries that can reduce greenhouse gas (GHG) emissions produced from forests (Littlefield et al, 2017; Chang et al, 2019). REDD+ is cheap because most forest degradation is only marginally profitable, it becomes cheaper to reduce GHG emissions from forests than other mitigation instruments It is fast because large reductions in GHG emissions can be achieved by carrying out policy reforms and other measures that are not dependent on technological innovation. It is mutually beneficial because it has the potential to generate large amounts of income and improve governance. It can benefit the poors in developing countries and provide other environmental benefits besides climate (Nurtjahjawilasa et al, 2013)
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