印度尼西亚亚太资源国际有限公司Deshmukh Chandra S研究组在研究印度尼西亚泥炭纤维人工林的净温室气体平衡上取得新进展。2023年4月5日出版的《自然》杂志发表了这项成果。

研究团队测量了2016年10月至2022年5月期间，来自Acacia crassicarpa林、退化林和完整森林的二氧化碳、甲烷和土壤氧化亚氮通量的净生态系统交换，代表了印度尼西亚苏门答腊的土地覆盖变化轨迹。这使得研究人员能够在泥炭地的纤维木种植园中呈现完整的种植园轮作温室气体通量的平衡。研究发现，尽管土地利用更加集约，但在平均地下水位（GWL）相似的情况下，刺槐人工林的温室气体排放量低于退化林地。

在一个完整的种植轮作期内，刺槐人工林的温室气体排放量(35.2±4.7 tCO₂-eq ha^-1year^-1，平均±标准差)比完整森林的排放量(20.3±3.7 tCO₂-eq ha^-1year^-1)高出约两倍。研究结果，有助于减少温室气体排放量估计的不确定性，提供土地利用变化对热带泥炭影响的估计，并发展以科学为基础的泥炭地管理实践，来作为基于自然的气候解决方案。

据介绍，热带泥炭地在其土壤和生物物质循环和储存了大量的碳。气候和土地利用的变化改变了热带泥炭地的温室气体（GHG）通量，但这些变化的幅度仍然很不确定。

附：英文原文

Title: Net greenhouse gas balance of fibre wood plantation on peat in Indonesia

Author: Deshmukh, Chandra S., Susanto, Ari P., Nardi, Nardi, Nurholis, Nurholis, Kurnianto, Sofyan, Suardiwerianto, Yogi, Hendrizal, M., Rhinaldy, Ade, Mahfiz, Reyzaldi E., Desai, Ankur R., Page, Susan E., Cobb, Alexander R., Hirano, Takashi, Gurin, Frdric, Sera, Dominique, Prairie, Yves T., Agus, Fahmuddin, Astiani, Dwi, Sabiham, Supiandi, Evans, Chris D.

Issue&Volume: 2023-04-05

Abstract: Tropical peatlands cycle and store large amounts of carbon in their soil and biomass. Climate and land-use change alters greenhouse gas (GHG) fluxes of tropical peatlands, but the magnitude of these changes remains highly uncertain. Here we measure net ecosystem exchanges of carbon dioxide, methane and soil nitrous oxide fluxes between October 2016 and May 2022 from Acacia crassicarpa plantation, degraded forest and intact forest within the same peat landscape, representing land-cover-change trajectories in Sumatra, Indonesia. This allows us to present a full plantation rotation GHG flux balance in a fibre wood plantation on peatland. We find that the Acacia plantation has lower GHG emissions than the degraded site with a similar average groundwater level (GWL), despite more intensive land use. The GHG emissions from the Acacia plantation over a full plantation rotation (35.2±4.7 t CO₂-eq ha^-1year^-1, average±standard deviation) were around two times higher than those from the intact forest (20.3±3.7 t CO₂ -eq ha^-1 year^-1), but only half of the current Intergovernmental Panel on Climate Change (IPCC) Tier 1 emission factor (EF) for this land use. Our results can help to reduce the uncertainty in GHG emissions estimates, provide an estimate of the impact of land-use change on tropical peat and develop science-based peatland management practices as nature-based climate solutions.

DOI: 10.1038/s41586-023-05860-9

Source: https://www.nature.com/articles/s41586-023-05860-9