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[1]WANG Ming-xia,ZHU Zhi-feng,LIU Fan,et al.Composition Characteristics of Soil Organic Carbon under Land Use Change in Jianghan Plain, Hubei Province[J].Research of Soil and Water Conservation,2012,19(06):24-28.

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Composition Characteristics of Soil Organic Carbon under Land Use Change in Jianghan Plain, Hubei Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 06 Page number: 24-28 Column: Public date: 2012-12-20

Title:: Composition Characteristics of Soil Organic Carbon under Land Use Change in Jianghan Plain, Hubei Province

Author(s):: WANG Ming-xia¹, ZHU Zhi-feng¹, LIU Fan¹, TAN Wen-feng^1,2; 1. Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtse River, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China

Keywords:: soil; active organic carbon; stable organic carbon; land use; Jianghan Plain

CLC:: S153.6

DOI:: -

Abstract:: The soil samples in orchard, dryland, paddy, and the field with dryland and paddy rotation were collected from Houhu state farm of Qianjiang City, Hubei Province, where is the centre of Jianghan plain. The total and active organic carbon, composition of humus, and light and heavy fractions were measured. The contents of organic carbon (OC) in topsoil were different under land use changes. The OC content for paddy soil was the highest and that for orchard soil was the lowest. The ratios of OC in humus to total SOC for orchard, dryland, paddy, and rotation soil were 0.98, 0.91, 0.78 and 0.86, respectively. The contents of OC in fulvic acid for paddy and rotation soils were higher than those in other soils. The proportion of stable organic carbon in total SOC was in the order of rotation≈dryland>orchard>paddy, and the light fraction followed the sequence of paddy>dryland>orchard>rotation. It was suggested that the SOC content would be increased under water culture. However, the SOC stability decreased under water culture, and it would lost easily when the environment changed. Rotation soil should be paid attention, which was both high in total and stable OC content. It indicates that rotation culture will not only increase SOC content, but also increase SOC stability. These results will be helpful to provide scientific references to develop rational ways of soil management and cultivation.

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