CO2 emissions of tropical peat soils under controlled groundwater table depths: A laboratory-based experiment

Q3 Social Sciences

Journal of Degraded and Mining Lands Management Pub Date : 2024-07-01 DOI:10.15243/jdmlm.2024.114.6135

Rabbirl Yarham Mahardika, G. Anshari, Urai Edi Suryadi

{"title":"CO2 emissions of tropical peat soils under controlled groundwater table depths: A laboratory-based experiment","authors":"Rabbirl Yarham Mahardika, G. Anshari, Urai Edi Suryadi","doi":"10.15243/jdmlm.2024.114.6135","DOIUrl":null,"url":null,"abstract":"The groundwater table (GWT) is widely recognized as a key factor influencing CO2 emissions in tropical peatlands. However, previous studies investigating this relationship have reported diverse results. This variability likely stems from the dynamic nature of field-based groundwater conditions. To address this, our study investigated the relationship between controlled GWT and CO2 emissions in a laboratory experiment using PVC columns filled with peat soil. GWT depths were adjusted to 20 cm, 30 cm, 40 cm, 50 cm, and 60 cm within a large container filled with peat pore water. CO2 emissions were measured using an Infra Red Gas Analyzer - Environmental Gas Monitoring-4 instrument, with a closed-chamber system. Our findings revealed significant differences in CO2 emissions between treatments, except for the transition from 20 cm to 30 cm GWT. Correlation analysis showed a positive correlation (R² = 0.25). Notably, CO2 emission factor values based on average yearly emission rates displayed a substantial increase with decreasing GWT, exhibiting a strong exponential relationship (R² = 0.99).","PeriodicalId":36513,"journal":{"name":"Journal of Degraded and Mining Lands Management","volume":"28 2","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Degraded and Mining Lands Management","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15243/jdmlm.2024.114.6135","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Social Sciences","Score":null,"Total":0}

引用次数: 0

Abstract

The groundwater table (GWT) is widely recognized as a key factor influencing CO2 emissions in tropical peatlands. However, previous studies investigating this relationship have reported diverse results. This variability likely stems from the dynamic nature of field-based groundwater conditions. To address this, our study investigated the relationship between controlled GWT and CO2 emissions in a laboratory experiment using PVC columns filled with peat soil. GWT depths were adjusted to 20 cm, 30 cm, 40 cm, 50 cm, and 60 cm within a large container filled with peat pore water. CO2 emissions were measured using an Infra Red Gas Analyzer - Environmental Gas Monitoring-4 instrument, with a closed-chamber system. Our findings revealed significant differences in CO2 emissions between treatments, except for the transition from 20 cm to 30 cm GWT. Correlation analysis showed a positive correlation (R² = 0.25). Notably, CO2 emission factor values based on average yearly emission rates displayed a substantial increase with decreasing GWT, exhibiting a strong exponential relationship (R² = 0.99).

查看原文本刊更多论文

受控地下水位深度下热带泥炭土的二氧化碳排放：实验室实验

人们普遍认为，地下水位（GWT）是影响热带泥炭地二氧化碳排放的一个关键因素。然而，以往调查这种关系的研究报告结果各不相同。这种差异可能源于实地地下水条件的动态性质。为了解决这个问题，我们的研究使用填充泥炭土的 PVC 柱，在实验室实验中调查了受控 GWT 与二氧化碳排放之间的关系。在一个装满泥炭孔隙水的大容器中，GWT 深度分别调整为 20 厘米、30 厘米、40 厘米、50 厘米和 60 厘米。二氧化碳排放量是用红外气体分析仪--环境气体监测-4 仪器和闭室系统测量的。我们的研究结果表明，除了从 20 厘米到 30 厘米 GWT 的过渡阶段外，不同处理之间的二氧化碳排放量存在明显差异。相关性分析表明存在正相关性（R² = 0.25）。值得注意的是，基于年平均排放率的二氧化碳排放因子值随着 GWT 的降低而大幅增加，呈现出强烈的指数关系（R² = 0.99）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊