Effects of sandy desertified land rehabilitation on soil carbon sequestration and aggregation in an arid region in China
文献类型：期刊论文
| 作者 | Su, Yong Zhong1,2; Wang, Xue Fen1; Yang, Rong1; Lee, Jaehoon3 |
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
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| 出版日期 | 2010-11-01 |
| 卷号 | 91期号:11页码:2109-2116 |
| 关键词 | Desertification control Soil carbon fractions Total nitrogen Soil aggregate Oasis Northwest China |
| ISSN号 | 0301-4797 |
| DOI | 10.1016/j.jenvman.2009.12.014 |
| 通讯作者 | Su, Yong Zhong(suyzh@lzb.ac.cn) |
| 英文摘要 | The rehabilitation of sandy desertified land in semi-arid and arid regions has a great potential to increase carbon sequestration and improve soil quality. Our objective was to investigate the changes in the soil carbon pool and soil properties of surface soil (0-15 cm) under different types of rehabilitation management. Our study was done in the short-term (7 years) and long-term (32 years) desertification control sites in a marginal oasis of northwest China. The different management treatments were: (1) untreated shifting sand land as control; (2) sand-fixing shrubs with straw checkerboards; (3) poplar (Populus gansuensis) shelter forest; and (4) irrigated cropland after leveling sand dune. The results showed that the rehabilitation of severe sandy desertified land resulted in significant increases in soil organic C (SOC), inorganic C, and total N concentrations, as well as enhanced soil aggregation. Over a 7-year period of revegetation and cultivation, SOC concentration in the recovered shrub land, forest land and irrigated cropland increased by 4.1, 14.6 and 11.9 times compared to the control site (shifting sand land), and increased by 11.2, 17.0 and 23.0 times over the 32-year recovery period. Total N, labile C (KMnO4-oxidation C), C management index (CMI) and inorganic C (CaCO3-C) showed a similar increasing trend as SOC. The increased soil C and N was positively related to the accumulation of fine particle fractions. The accumulation of silt and clay, soil C and CaCO3 enhanced the formation of aggregates, which was beneficial to mitigate wind erosion. The percentage of >0.25 mm dry aggregates increased from 18.0% in the control site to 20.0-87.2% in the recovery sites, and the mean weight diameter (MWD) of water-stable aggregates significantly increased, with a range of 0.09-0.30 mm at the recovery sites. Long-term irrigation and fertilization led to a greater soil C and N accumulation in cropland than in shrub and forest lands. The amount of soil C sequestration reached up to 1.8-9.4 and 7.5-17.3 Mg ha(-1) at the 0-15 cm layer over a 7- and 32-year rehabilitation period compared to the control site, suggesting that desertification control has a great potential for sequestering soil C and improving soil quality in northwest China. (C) 2009 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | NORTHERN CHINA ; ORGANIC-CARBON ; AGRICULTURAL SOILS ; MANAGEMENT INDEX ; TENGGER DESERT ; HEXI CORRIDOR ; PLANTATIONS ; ECOSYSTEMS ; RESTORATION ; IRRIGATION |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000281459400004 |
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556361 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Su, Yong Zhong |
| 作者单位 | 1.Chinese Acad Sci, Linze Inland River Basin Res Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Key Lab Inland River Ecohydrol, Lanzhou 730000, Peoples R China 3.Univ Tennessee, Knoxville, TN 37996 USA |
| 推荐引用方式 GB/T 7714 | Su, Yong Zhong,Wang, Xue Fen,Yang, Rong,et al. Effects of sandy desertified land rehabilitation on soil carbon sequestration and aggregation in an arid region in China[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2010,91(11):2109-2116. |
| APA | Su, Yong Zhong,Wang, Xue Fen,Yang, Rong,&Lee, Jaehoon.(2010).Effects of sandy desertified land rehabilitation on soil carbon sequestration and aggregation in an arid region in China.JOURNAL OF ENVIRONMENTAL MANAGEMENT,91(11),2109-2116. |
| MLA | Su, Yong Zhong,et al."Effects of sandy desertified land rehabilitation on soil carbon sequestration and aggregation in an arid region in China".JOURNAL OF ENVIRONMENTAL MANAGEMENT 91.11(2010):2109-2116. |
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来源：寒区旱区环境与工程研究所
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