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Soil organic carbon storage under different land-use types in Sanjiang Plain. |
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Abstract Soil organic carbon (SOC) storage in soil of 1m-depth profiles (totally 16) under 5 different land-use types in Sanjiang Plain, Northeast China was analyzed. Content and density of SOC decreased in vertical distribution under different land-use types, and the tendency of variation descended with the increase of depth. Reclamation reduced the content and density of SOC, and changed the distribution structure in topsoil. A preliminary estimate showed that the SOC storage of 1m-depth was 1.58×104t/km2 in wetland, 1.23×104t/km2 in abandoned land, 1.01×104t/km2 in woodland, 0.85×104t/km2 in paddy land and 0.99×104t/km2 in glebe. It concluded that reclamation reduced SOC storage of wetland, and the effect was more significant in farmland than in woodland. Wetland restoration could be beneficial to soil carbon sequestration and would increase the soil organic carbon storage.
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Received: 06 November 2008
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