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[1]LIU Ren-tao,ZHU Fan.Carbon Distribution in Surface Soil and Its Impact Factors During Caragana intermedia Shrubland Development in Desert Steppe[J].Research of Soil and Water Conservation,2013,20(02):19-24.

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Carbon Distribution in Surface Soil and Its Impact Factors During Caragana intermedia Shrubland Development in Desert Steppe

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 02 Page number: 19-24 Column: Public date: 2013-04-28

Title:: Carbon Distribution in Surface Soil and Its Impact Factors During Caragana intermedia Shrubland Development in Desert Steppe

Author(s):: LIU Ren-tao, ZHU Fan; Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China, Ministry of Education, Ningxia University, Yinchuan 750021, China

Keywords:: desert steppe; C. intermedia; soil organic carbon; soil texture; ground vegetation

CLC:: S153.6⁺1

DOI:: -

Abstract:: The artificial shrub planted in sandy grassland can intercept the air carbon and facilitate the soil carbon content and storage. However, the carbon distribution in surface soil and related impact factors during shrubland (C. intermedia) development in desert steppe were largely unknown. An investigation on surface soil carbon content and storage under the shrub and in the open was carried out in lands grown shrubs with the shrub ages of 6, 15, 24 and 36 years. By analyzing soil particle-size distribution and ground herbaceous vegetation, the surface soil carbon distribution and its relation to environmental variables were discussed. The results were as follows: (1) there was a linear regression between surface soil carbon content and storage and C/N under the shrub and stand age (P<0.05), with significantly increased surface soil carbon content and storage and decreased soil C/N; (2) there was a spreading effect of stand development on surface carbon distribution in the open between shrubs, where surface soil carbon content and storage increased from 24 to 36 years of shrubland though with no significance (P>0.05); (3) the surface soil carbon distribution at small scale under shrub determined the surface carbon distribution of whole stand, and surface soil carbon content and storage were enhanced for the whole stand at big scale during stand development. With the accumulation of soil nitrogen, there were no significant differences of soil C/N between these four shrublands; (4) the stand development could not only facilitate surface soil carbon distribution under the shrub in desert steppe, but also have a spreading effect on surface carbon distribution in the open. This was beneficial for the enhancement of surface soil carbon content and storage of grassland ecosystems during the recovery process.

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