Biogeochemistry of paddy soils
文献类型：期刊论文
| 作者 | Koegel-Knabner, Ingrid1; Amelung, Wulf2; Cao, Zhihong3; Fiedler, Sabine4; Frenzel, Peter5; Jahn, Reinhold6; Kalbitz, Karsten7; Koelbl, Angelika1; Schloter, Michael8 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2010-06-15 |
| 卷号 | 157期号:1-2页码:1-14 |
| 关键词 | Anthrosols Wetland Paddy management Mineral transformation Soil organic matter Soil N Soil solution chemistry Microbial community |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2010.03.009 |
| 通讯作者 | Koelbl, Angelika(koelbl@wzw.tum.de) |
| 英文摘要 | Paddy soils make up the largest anthropogenic wetlands on earth. They may originate from any type of soil in pedological terms, but are highly modified by anthropogenic activities. The formation of these Anthrosols is induced by tilling the wet soil (puddling), and the flooding and drainage regime associated with the development of a plough pan and specific redoximorphic features. Redox potential oscillations due to paddy management control microbial community structure and function and thus short-term biogeochemical processes. After flooding, microbial reduction processes sequentially use NO(3)(-) Mn(4+), Fe(3+), SO(4)(2-) as electron acceptors, accompanied by the emission of the trace gases N(2)O, N(2), H(2)S, CH(4) and - due to reduction-induced increasing pH - NH(3). This results in N losses and low N fertilizer use efficiency. However, transport of atmospheric O(2) to the roots via the rice plant's aerenchyma modifies conditions in the rhizosphere, leading to nitrification and methane oxidation, and precipitation of Mn and Fe oxides. High concentrations and fluxes of dissolved organic matter (DOM) in paddy soils from plant debris trigger microbial activity and thus the emission of greenhouse gases. Retention of DOM by soil minerals and its subsequent stabilisation against microbial decay depend on the redox state (e.g. DOM precipitation by Fe(2+) under anaerobic conditions). Oscillation in redox conditions may enhance retention and stabilisation of DOM by Fe oxyhydroxides. Induced by the periodic short-term redox cycles, paddy management over long periods has strong effects on long-term biogeochemical processes. Frequent irrigation intensifies mineral weathering and leaching processes. High concentrations of DOM during flooding seasons enhance the changes and the release of structural iron in clay minerals, and support the formation of ferrihydrite. Repeated redox alternations lead to a translocation of iron in various directions, and particularly increase the crystallinity of iron oxides. This results also in higher total iron oxide contents in paddy compared to non-paddy soils. The large accumulation of soil organic matter (SOM) observed in some, but not all paddy soils, is considered to be due to high input of plant residues and charred material associated with retarded decomposition under anaerobic conditions. There is also evidence of SOM stabilisation via occlusion into aggregates and phytoliths as well as interactions with clay minerals and iron oxides. SOM accumulation in paddy subsoils can be explained by downward movement of DOM and its stabilisation by interaction with iron oxides. A specific feature of paddy soils is the coupling of organic matter turnover with mineral transformations and fluxes, which seem to be intensified by the alternating redox conditions with increasing age of paddy soil development. Bioavailability of soil organic N is strongly coupled to SOM cycling and is a crucial parameter determining crop yield. Anaerobic conditions inhibit N mineralization, with a high risk of gaseous N losses. In paddy soils the management-induced, microbially mediated redox processes control the dynamics of soil minerals and soil organic matter, which are strongly related to the microbial accessibility of C and N, but also of Fe. (C) 2010 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | DISSOLVED ORGANIC-CARBON ; LOWLAND RICE SOILS ; HUMIC-ACID FRACTIONS ; METHANOGENIC ARCHAEAL COMMUNITY ; METHANE TRANSPORT CAPACITY ; PARTICLE-SIZE FRACTIONS ; SOLID-STATE C-13 ; ORYZA-SATIVA L. ; WETLAND RICE ; SEQUENTIAL REDUCTION |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000278651500001 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558821 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Koelbl, Angelika |
| 作者单位 | 1.Tech Univ Munich, Lehrstuhl Bodenkunde, D-85350 Freising Weihenstephan, Germany 2.Univ Bonn, Inst Nutzpflanzenwissensch & Ressourcenschutz, Bereich Bodenwissenschaf, D-53115 Bonn, Germany 3.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 4.Univ Hohenheim, Inst Bodenkunde & Standortslehre, D-70593 Stuttgart, Germany 5.Max Planck Inst Terr Mikrobiol, D-35043 Marburg, Germany 6.Univ Halle Wittenberg, Inst Agrar & Ernahrungswissensch, D-06108 Halle, Germany 7.Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, NL-1018 WV Amsterdam, Netherlands 8.Helmholtz Zentrum Munchen, Inst Bodenokol, D-85764 Neuherberg, Germany |
| 推荐引用方式 GB/T 7714 | Koegel-Knabner, Ingrid,Amelung, Wulf,Cao, Zhihong,et al. Biogeochemistry of paddy soils[J]. GEODERMA,2010,157(1-2):1-14. |
| APA | Koegel-Knabner, Ingrid.,Amelung, Wulf.,Cao, Zhihong.,Fiedler, Sabine.,Frenzel, Peter.,...&Schloter, Michael.(2010).Biogeochemistry of paddy soils.GEODERMA,157(1-2),1-14. |
| MLA | Koegel-Knabner, Ingrid,et al."Biogeochemistry of paddy soils".GEODERMA 157.1-2(2010):1-14. |
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来源：南京土壤研究所
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