Comparison of organic compounds in the particle-size fractions of earthworm casts and surrounding soil in humid Laos
文献类型：期刊论文
| 作者 | Zhang, XD ; Ang, J ; Xie, HT ; Wang, JK ; Zech, W |
| 刊名 | APPLIED SOIL ECOLOGY
 |
| 出版日期 | 2003 |
| 卷号 | 23期号:2页码:147-153 |
| 关键词 | lignin sugar endogeic earthworm particle-size fractionation soil tropics |
| ISSN号 | 0929-1393 |
| 通讯作者 | Zhang, XD, CAS, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China |
| 中文摘要 | Storage of soil organic matter (SOM) in earthworm casts contributes to an improvement of soil fertility, especially in the tropics. This study was conducted to elucidate the incorporation of microbe- and plant-derived organic compounds into earthworm casts in humid Laos. Composite samples of earthworm casts and surrounding topsoil (0-10 cm) were fractionated into the following size fractions: coarse sand (250-2000 mum), fine sand (20-250 mum), silt (2-20 mum), and clay (<2 mum). Thereafter, lignin-derived phenols, neutral, acidic, and amino sugars were determined in bulk samples and the fractions. Organic C and N were enriched in earthworm casts, exceeding the respective C and N contents of the surrounding soil by a factor of 1.5, and 1.3, respectively. This enrichment was apparent in all particle-size fractions, and was not restricted to certain organic compounds. Plant-derived lignin, however, was accumulated in preference to microbe-derived amino sugars. The latter were rather redistributed among different size fractions of the casts. As differences in SOM composition between casts and surrounding soil were reflected most clearly for the silt fractions, it is concluded that organic matter storage in the casts of humid Laos is accompanied by the incorporation of SOM into (pseudo) stable silt-sized microaggregates. (C) 2003 Elsevier Science B.V. All rights reserved. |
| 学科主题 | Soil Science |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000183294600006 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/55397]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang, XD,Ang, J,Xie, HT,et al. Comparison of organic compounds in the particle-size fractions of earthworm casts and surrounding soil in humid Laos[J]. APPLIED SOIL ECOLOGY,2003,23(2):147-153. |
| APA | Zhang, XD,Ang, J,Xie, HT,Wang, JK,&Zech, W.(2003).Comparison of organic compounds in the particle-size fractions of earthworm casts and surrounding soil in humid Laos.APPLIED SOIL ECOLOGY,23(2),147-153. |
| MLA | Zhang, XD,et al."Comparison of organic compounds in the particle-size fractions of earthworm casts and surrounding soil in humid Laos".APPLIED SOIL ECOLOGY 23.2(2003):147-153. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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