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ゴムの樹齢クラスを活用した自主的炭素クレジット補償メカニズムの構築

Utilizing Rubber Tree Age-Classes to Structure a Voluntary Carbon Credit Compensation Mechanism (原題)

Rawee Chiarawipa, Benchaporn Sengaing, Piyanut Musigapong, Buncha Somboonsuke

Research on World Agricultural Economy📚 査読済 / ジャーナル2026-08-26#carbon_credits対象セクター: agriculture
DOI: 10.36956/rwae.v7i3.105540
原典: https://doi.org/10.36956/rwae.v7i3.105540

🤖 gxceed AI 要約

日本語

ゴム農園の樹齢を7年ごとの4段階に分類し、炭素貯留量とGHG排出量を評価して炭素クレジット収入を分析。中齢期(S2)で純貯留量が最大となり、経済性も高いことを示した。2015〜2024年の価格分析では市場のボラティリティが顕著で、政策的介入の必要性を強調。

English

This study categorizes rubber plantations into four 7-year age stages to assess carbon stock and credit revenue. Net GHG stock peaks in mid-age (S2) at 21.01 Mg CO2e/ha/yr, with highest net revenue also in S2 ($1,335.71 per contract). Historical price volatility (2015-2024) underscores the need for policy intervention to support smallholder participation.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本ではSSBJ開示やカーボンクレジット市場(J-クレジット)が注目される中、本研究成果は農園系プロジェクトの方法論設計に示唆を与える。特に、樹齢段階に応じたクレジット算定は、海外でのJCM案件形成や、国内の森林・農地由来クレジットの設計にも応用可能。

In the global GX context

Globally, voluntary carbon markets face credibility challenges; this study offers a standardized age-class framework for rubber plantations that could enhance transparency and consistency in credit issuance. It also highlights the economic viability and risks for smallholders, informing policy design for equitable participation in carbon finance.

👥 読者別の含意

🔬研究者:Provides a replicable age-stage methodology for carbon accounting in perennial crops.

🏢実務担当者:Offers a framework for structuring carbon credit projects in rubber plantations, useful for project developers and agribusiness.

🏛政策担当者:Highlights the need for policy mechanisms to stabilize carbon prices and support smallholder inclusion.

📄 Abstract(原文)

Rubber plantations, as long-term perennial crops, hold significant potential for climate change mitigation through carbon sequestration; however, a standardized carbon credit compensation model aligned with plantation management cycles remains absent in the voluntary market. This study aimed to develop a framework for assessing carbon stock potential and analyzing carbon credit revenue by categorizing the rubber plantation lifecycle into four distinct 7-year developmental stages: S1 (1 to 7 yrs), S2 (>7 to 14 yrs), S3 (>14 to 21 yrs), and S4 (>21 to 28 yrs), assessing GHG emissions, and projecting income. The results demonstrated that GHG emissions increased significantly across the developmental stages (from 0.40 in S1 to 1.20 Mg CO2e/ha/yr in S4). Conversely, the net GHG stock rate peaked in the mid-aged stage (21.01 Mg CO2e/ha/yr in S2), reflecting the period of most vigorous biomass accumulation. However, the stock rate was lowest in the initial S1 stage (18.65 Mg CO2e/ha/yr) and declined to 19.88 Mg CO2e/ha/yr in S4. Economic analysis revealed that the mid-to-older-aged stages offered the highest potential net revenue, ranging from the maximum of $1,335.71 (S2) down to $1,264.70 (S4) per contract stage. Historical price analysis (2015 to 2024) further highlighted extreme market volatility, with aggregate revenue surging from a low of $1,528.72 per contract stage in 2017 to a peak of $10,248.80 per contract stage in 2024. In conclusion, the 7-year age-stage benchmark supports the implementation of sustainable carbon credit projects. Policy intervention, however, is essential to mitigate price uncertainty risks and ensure flexible long-term contracts for equitable and continuous participation by smallholder farmers.

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