| Project/Area Number |
20510020
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Environmental dynamic analysis
|
|---|
| Research Institution | National Institute for Agro-Environmental Sciences |
|---|
Principal Investigator |
KISHIMOTO Ayaka National Institute for Agro-Environmental Sciences, 物質循環研究領域, 主任研究員 (60334033)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YONEMURA Seiichiro 独立行政法人農業環境技術研究所, 大気環境研究領域, 主任研究員 (20354128)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
UCHIDA Masaki 国立極地研究所, 助教 (70370096)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Keywords | 土壌有機物分解 / 地球温暖化 / 野外加温操作実験 / 土壌呼吸 / 土壌炭素管理 / 温室効果ガス / 黒ボク土 / 炭素循環のフィードバック効果 / 農耕地土壌 |
|---|
| Research Abstract |
In order to study the effects of warming on the decomposition of soil organic carbon (Rh) under Asia monsoon climate and soil properties, we designed a field soil warming experiment for a cultivated Andisol. Raising the soil temperature by 2℃ in the heated plots appeared to increase Rh during the cool seasons (winter to early summer) by approximately 2-13% compared to the non-heated control plots. In contrast, during the warm seasons (summer to Autumn), soil warming induced the decreased Rh in the heated plots, about 10-18% lower relative to the control plots. Our results suggest that 2℃ temperature raise can have drastically different impact on soil organic matter decomposition between warm and cold season most likely through its effect on soil moisture regime, highlighting the importance of accounting for temperature vs. moisture interaction in the models when predicting soil carbon dynamic under climate warming scenario.
|
