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[1]LIU Zheng-gang,PEI Bo-yang,WANG Xian-shuai.Characteristics of SOC and ROC under Different Land Use Types at Arid Valley in the Upper Reaches of Minjiang River[J].Research of Soil and Water Conservation,2011,18(03):24-27,31.

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Characteristics of SOC and ROC under Different Land Use Types at Arid Valley in the Upper Reaches of Minjiang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 03 Page number: 24-27,31 Column: Public date: 2011-06-20

Title:: Characteristics of SOC and ROC under Different Land Use Types at Arid Valley in the Upper Reaches of Minjiang River

Author(s):: LIU Zheng-gang, PEI Bo-yang, WANG Xian-shuai; Sichuan Provincial Key Lab of Forestry Ecological Engineering, Sichuan Agricultural University, Ya’an, Sichuan 625014, China

Keywords:: arid valley-mountain forests ecotone; land use types; SOC; ROC

CLC:: F301.24;S153.62

DOI:: -

Abstract:: Ecotone is a sensitive region for global climate change,and study on soil organic carbon under different land use types at ecotone could provide basic data for the effect of carbon sink function for land management concerning land use and land coverage change.This paper analyzed the contents and distribution characteristics of soil organic carbon(SOC) and readily oxidation carbon(ROC) and the relationship between them under six kinds of representative land use types(including Quercus semicarpifolia secondary forest,shrub,shrubbery,Zanthoxylum bungeanum forest,farmland and Robinia pseudoacacia plantation) at arid valley-mountain forest ecotone in the upper reaches of Minjiang River.The results showed that respective content of SOC and ROC decreased with the increase of depth of soil;there is extremely significant correlation between SOC and ROC;the ROC content accounted for 3.57%～12.71% of SOC,which showed Quercus semicarpifolia secondary forest>farmland>shrubbery>Robinia pseudoacacia plantation>shrub>Zanthoxylum bungeanum forest.It can be seen that vegetation types is an important reason for causing the content differences between ROC and SOC under different land use types at ecotone.

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