Changes in soil CO_2 concentration and soil respiration during rainfall events: analysis focused on change of soil gas diffusion coefficient

降雨过程中土壤CO_2浓度和土壤呼吸的变化：以土壤气体扩散系数变化为重点的分析

• 批准号: 20780112
• 负责人: HOTTA Noeifumi
• 金额: $ 2.58万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20780112/
• 关键词: 土壌呼吸; 土壌中二酸化炭素濃度; 土壌中ガス拡散係数; 降雨; 季節性; 土壌呼吸速度

Soil respiration and soil CO_2 concentration profile were measured during two rainfall events to investigate the effect of rainfall on soil respiration and soil CO_2 concentration. Those data were compared with gas diffusion coefficients in soil derived from observed soil temperature and moisture. As a result, soil CO_2 storage determined the patterns of soil CO_2 concentration and soil respiration during rainfall. The pattern was different among rainfall events due to different soil CO_2 regime which was induced by seasonality of rainfall and soil CO_2 production profile.

通过对两次降雨过程中土壤呼吸和土壤CO2浓度剖面的测定，研究了降雨对土壤呼吸和土壤CO2浓度的影响。这些数据进行了比较，在土壤中的气体扩散系数来自观测土壤温度和湿度。结果表明，土壤CO_2贮量决定了降雨过程中土壤CO_2浓度和土壤呼吸的变化规律。由于降雨的季节性和土壤CO_2生产剖面的不同，导致不同降雨事件的土壤CO_2状况不同。

项目成果

降雨の季節性が土壌呼吸に与える影響

降雨季节对土壤呼吸的影响

• 发表时间: 2009
• 作者: 堀田紀文;奈良康平;小田智基;鈴木雅一;堀田紀文
• 通讯作者: 堀田紀文

降雨イベント中の土壌中二酸化炭素濃度と土壌呼吸速度の変化

降雨期间土壤二氧化碳浓度和土壤呼吸速率的变化

• 发表时间: 2010
• 期刊: 東京大学演習林報告
• 作者: 堀田紀文;奈良康平;小田智基;鈴木雅一
• 通讯作者: 鈴木雅一