Major biogeochemical processes in soils - A microcosm incubation from reducing to oxidizing conditions
文献类型：期刊论文
| 作者 | Yu, KW; Bohme, F; Rinklebe, J; Neue, HU; DeLaune, RD; Yu, KW, Louisiana State Univ, Sch Coast & Environm, Wetland Biogeochem Inst, Baton Rouge, LA 70803 USA |
| 刊名 | SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
 |
| 出版日期 | 2007 |
| 卷号 | 71期号:4页码:1406-1417 |
| ISSN号 | 0361-5995 |
| 英文摘要 | Six soils used for rice (Oryza sativa L.) production were incubated using an automatic microcosm system. Production of trace gases (CO2, CH4, and N2O) and transformation of N, S, and metals (Fe and Mn) were studied in soil suspensions incubated from reducing to oxidizing conditions. Results show that soil pH variation was inversely correlated to soil redox potential (E-H) change (P < 0.0 1). Soil CO2 production exponentially increased with soil E-H increase. In contrast, soil CH4 production and DOC showed an exponential decrease with soil E-H increase. Without the presence of soil oxidants, methanogenesis occurred across the entire E-H range, with probable H-2-supported methanogenesis at higher soil E-H conditions constituting up to 20% of total CH4 production. The CH4 compensation point, where CH4 concentration became constant due to equilibrium between CH4 production and consumption, exponentially decreased with soil E-H increase. At pH 7, the critical E-H above which soils consumed atmospheric CH4 varied among the soils, but was generally > 400 mV. Significant N2O production was observed between 200 and 500 mV Nitrification could also contribute to N2O production when E-H is > 500 mV, a possible critical E-H for the initiation of nitrification. The critical E-H for substantial immobilization of Fe and Mn was estimated to be around 50 and 250 mV, respectively. The intermediate E-H range (approximately -150 to 180 mV) provided optimum conditions for minimizing cumulative global warming potential resulting from CO2, CH4, and N2O production in soils. Our results have implications in interpreting the overall benefits of soil C sequestration efforts. |
| 学科主题 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000248103200037 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54645]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所 |
| 通讯作者 | Yu, KW, Louisiana State Univ, Sch Coast & Environm, Wetland Biogeochem Inst, Baton Rouge, LA 70803 USA |
| 推荐引用方式 GB/T 7714 | Yu, KW,Bohme, F,Rinklebe, J,et al. Major biogeochemical processes in soils - A microcosm incubation from reducing to oxidizing conditions[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2007,71(4):1406-1417. |
| APA | Yu, KW,Bohme, F,Rinklebe, J,Neue, HU,DeLaune, RD,&Yu, KW, Louisiana State Univ, Sch Coast & Environm, Wetland Biogeochem Inst, Baton Rouge, LA 70803 USA.(2007).Major biogeochemical processes in soils - A microcosm incubation from reducing to oxidizing conditions.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,71(4),1406-1417. |
| MLA | Yu, KW,et al."Major biogeochemical processes in soils - A microcosm incubation from reducing to oxidizing conditions".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 71.4(2007):1406-1417. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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