Spatial distribution of soil organic matter in two fields on tidal flat sediments (Zhejiang Province, China) differing in duration of paddy management
文献类型：期刊论文
| 作者 | Koelbl, Angelika1; Mueller-Niggemann, Cornelia2; Schwark, Lorenz2,3; Cao, Zhi-Hong4; Koegel-Knabner, Ingrid1,5 |
| 刊名 | JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
 |
| 出版日期 | 2015-08-01 |
| 卷号 | 178期号:4页码:649-657 |
| 关键词 | chronosequence geostatistics organic carbon soil color soil lightness |
| ISSN号 | 1436-8730 |
| DOI | 10.1002/jpln.201400119 |
| 通讯作者 | Koelbl, Angelika(koelbl@wzw.tum.de) |
| 英文摘要 | Despite of its ecological and economic importance, only limited information is available on spatial variability of soil organic C (OC) in paddy fields during soil development. To obtain deeper insights into the accumulation and spatial distribution of OC with ongoing paddy management, the present study investigates spatial heterogeneities in puddled topsoil layers, in the plough pan, as well as in the underlying subsoil of a 50- and 300-y old paddy site at the area of Cixi (Hangzhou Bay, E China). Sampling of the plots was done on the basis of a regular, orthogonal grid. The grid combined a large-scale design with distances of 5m with a small-scale nested sampling ranging within 0.5 to 1m. Samples have been taken with an auger in three sampling depths: (1) puddled topsoil layer, (2) dense plough layer, (3) mixed subsoil horizon. All samples were analyzed for their OC and total N concentrations as well as for their soil color (lightness value) to assess relationships between soil lightness and OC amount and distribution. The spatial behavior of all analyzed parameters in the different soil layers was investigated by calculating variograms; the degree of spatial dependence was determined by nugget-to-sill ratios. The results show that for each analyzed soil layer, OC and N concentrations were significantly higher in the field with 300 y of paddy management than in the field with 50 y of paddy management. Topsoil OC concentrations changed from 13.8 to 23.6 mg g(-1), OC in the plough layer changed from 3.3 to 9.6mgg(-1), and also the subsoil showed a slight increase from 2.9 to 3.3 mg g(-1). Although only two points in time were compared, we assume that paddy soil formation is the most likely reason for differences in the spatial distribution of OC between the two sites. Comparing the spatial depth distribution of the 50- and 300-y old paddy sites suggests that the development of a spatial pattern of OC proceeded with time from topsoil to the underlying soil horizons. Measuring soil lightness was insufficient to predict amount and distribution of soil OC in paddy soils, especially in soils with interfering dark-colored burnt straw residues. The degree of spatial homogeneity was equal in the two sites, suggesting that cultivation practices (puddling, levelling, burning and incorporation of straw residues) most likely maintained a rather high random spatial variability of approx. 45%. The spatial pattern of OC in the topsoil was dissimilar to the plough layer, revealing that transport of OC in the plough pan occurred mainly in preferential flow paths along localized cracks and biopores. |
| 收录类别 | SCI |
| WOS关键词 | YANGTZE-RIVER DELTA ; RICE FIELDS ; GEOSTATISTICAL ANALYSIS ; SUBTROPICAL CHINA ; VERTICAL WATER ; VARIABILITY ; CARBON ; CHRONOSEQUENCE ; ACCUMULATION ; CULTIVATION |
| WOS研究方向 | Agriculture ; Plant Sciences |
| WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000359062700013 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558351 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Koelbl, Angelika |
| 作者单位 | 1.Tech Univ Munich, Dept Ecol & Ecosyst Sci, Ctr Life & Food Sci Weihenstephan, Lehrstuhl Bodenkunde, D-85350 Freising Weihenstephan, Germany 2.Univ Kiel, Inst Geosci, D-24118 Kiel, Germany 3.Curtin Univ, Dept Chem, WA OIGC, Perth, WA 6845, Australia 4.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China 5.Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Koelbl, Angelika,Mueller-Niggemann, Cornelia,Schwark, Lorenz,et al. Spatial distribution of soil organic matter in two fields on tidal flat sediments (Zhejiang Province, China) differing in duration of paddy management[J]. JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE,2015,178(4):649-657. |
| APA | Koelbl, Angelika,Mueller-Niggemann, Cornelia,Schwark, Lorenz,Cao, Zhi-Hong,&Koegel-Knabner, Ingrid.(2015).Spatial distribution of soil organic matter in two fields on tidal flat sediments (Zhejiang Province, China) differing in duration of paddy management.JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE,178(4),649-657. |
| MLA | Koelbl, Angelika,et al."Spatial distribution of soil organic matter in two fields on tidal flat sediments (Zhejiang Province, China) differing in duration of paddy management".JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE 178.4(2015):649-657. |
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来源：南京土壤研究所
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