Soil moisture effect on the temperature sensitivity of soil respiration

2017 Fiscal Year Final Research Report

• Project/Area Number: 26450216
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Sakata Tadashi 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (50353701)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 土壌炭素動態 / 温室効果ガス / 温度依存性 / 乾燥影響

Outline of Final Research Achievements

Q10 values of soil respiration were measured at a soil drying treatment by rainfall interruption in a Japanese cedar plantation forest in Kasumigaura city, Ibaraki prefecture. The Q10 value of soil respiration by field observation was significantly decreased by the drying treatment. On the other hand, the Q10 value of CO2 emission from root, litter and mineral soil by laboratory experiments were not significantly different by the drying treatment. The rate of CO2 emission from the litter at the drying treatment was very small and the Q10 value of the CO2 emission from the litter was larger than the root. Therefore, it was considered that the Q10 value of soil respiration decreased due to the decrease of the contribution ratio of litter emission to soil respiration decreased with desiccation, in other words, the increase of the contribution of root respiration with relatively low Q10 value.

Free Research Field

森林土壌学