Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area

doi:10.3969/j.issn.1004-1524.2017.10.18

›› 2017, Vol. 29 ›› Issue (10): 1720-1725.DOI: 10.3969/j.issn.1004-1524.2017.10.18

• Environmental Science • Previous Articles Next Articles

Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area

LAN Jiacheng¹, XIAO Shizhen^{1, 2, *}, LIN Junqing¹, SHEN Yan³

1. School of Karst Science, Guizhou Normal University/State Key Engineering Technology Research Center for Karst Rocky Desertification Rehabilitation of China, Guiyang 550001, China;
2. Key Laboratory of Eco-Environments in Three Gorges Reservoir, Ministry of Education/School of Geographical Science, Southwest University, Chongqing 400715, China;
3. Meishan High School, Meishan 620010, China

Received:2017-03-14 Online:2017-10-20 Published:2017-12-05

Abstract

Abstract: In the present study, forest land, vegetable land, grass land and abandoned land in Karst mountainous area of Zhongliang in Chongqing were selected as study objects. Influences of different land use types on soil light fraction organic carbon (LFOC) and heavy fraction organic carbon (HFOC) contents, distributions and sensitivity were studied using the method of relative density fractionation, variance analysis and correlation analysis. It was shown that contents of soil organic carbon (SOC), LFOC, HFOC and LFOC/SOC in forest land, vegetable land, grass land were significantly higher than those in abandoned land. However, HFOC/SOC in abandoned land were higher than those in the other land use types. The contents of LFOC, HFOC and SOC under different land use types decreased with the increasing soil depth. Soil LFOC had the highest sensitivity, and was followed by SOC and HFOC. Soil LFOC was more sensitive to the land use changes. Therefore, soil LFOC could be used as indicator of soil quality and soil organic stability.

Key words: Karst mountain, land use, soil organic carbon, soil property

CLC Number:

S153.6

LAN Jiacheng, XIAO Shizhen, LIN Junqing, SHEN Yan. Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area[J]. , 2017, 29(10): 1720-1725.

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Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area

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