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[1]CUI Dong,XIAO Zhiguo,ZHAO Yu,et al.Effects of Different Land Use Patterns on Soil Active Organic Carbon Pool and Carbon Pool Management Index in Yili Area, Xinjiang Uygur Autonomous Region[J].Research of Soil and Water Conservation,2017,24(01):61-67.

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Effects of Different Land Use Patterns on Soil Active Organic Carbon Pool and Carbon Pool Management Index in Yili Area, Xinjiang Uygur Autonomous Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 01 Page number: 61-67 Column: Public date: 2017-02-28

Title:: Effects of Different Land Use Patterns on Soil Active Organic Carbon Pool and Carbon Pool Management Index in Yili Area, Xinjiang Uygur Autonomous Region

Author(s):: CUI Dong, XIAO Zhiguo, ZHAO Yu, DENG Xia, MENG Xiangxia, LUO Qingqing; College of Biology and Geography, Yili Normal University, Yi’ning, Xinjiang 835000, China

Keywords:: land use patterns; active organic carbon pool of soil; carbon management index; Yili River Valley

CLC:: S153.6

DOI:: -

Abstract:: The soil carbon pool management index (CPMI) can be used to find out the interference of human factors on land use patterns. The different land use patterns (cultivated land, forest land, grassland and wasteland) in Yili River Valley were selected as the study examples. Soil organic carbon (SOC) content, active organic carbon content and the ratio of SOC content in the different land use patterns, and correlation between various patterns of organic carbon content, CPMI were analyzed. The results showed that: (1) there were significant differences in SOC contents and WSOC (water soluble organic carbon) contents in different land use patterns, SOC content decreased in the order: grassland>forest land>cultivated land>wasteland; WSOC content decreased in the sequence: cultivated land (highest) >wasteland (minimum); the lowest ROC (readily oxidized organic carbon) content is grassland; MBC (microbial biomass carbon) content in the soil layers in 0—20 cm and 20—40 cm decreased in the order: grassland (highest) >forest land (minimum); ROC content of wasteland is higher than grassland. The contents of SOC in different land use patterns decreased with the increase of soil depth; the content of ROC increased with the increase of soil depth; in addition to forest land, MBC contents of the other samples increased with soil depth increase first and then decreased, but WSOC content decreased with the increase of the soil depth; (2) under different land use patterns, the proportion of ROC, MBC and WSOC in SOC were not identical and the activity of carbon pool mainly depended on the proportion of ROC, the proportion of ROC decreased in the order: wasteland > cultivated land > forest land > grassland; the proportion of MBC decreased in the order: wasteland > cultivated land > grassland > forest land; the proportion of WSOC decreased in the sequence: cultivated land > forest land > wasteland > grassland. The proportion of active organic carbon in the same land use decreased in the order: ROC > MBC > WSOC; (3) without considering the influence of soil layer, the content of ROC in cultivated land was negatively correlated with the content of MBC; the content of SOC in forest was significantly negatively correlated with ROC content; the content of SOC in the wasteland was significantly positively correlated with the WSOC content, the linear correlation between SOC, ROC, MBC and WSOC content in different land use patterns was generally poor; (4) in the same land use patterns, CPMI with the depth of the soil layer increased first and then decreased; the CPMI of the 0—20 cm soil layer decreased in the order: forest land > wasteland (100) > cultivated land > grassland. Land use pattern conversion of wasteland, grassland, cultivated land to forestland is useful to the improvement of CPMI, it is advantageous to soil fertility, promoting carbon cycle.

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