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| Organic Carbon Storage of Cultivated Topsoils and Its Influencing Factors in Jilin Province |
| Received:March 13, 2014 |
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| KeyWord:Jilin Province;cultivated topsoil;soil organic carbon density;organic carbon storage;spatial distribution;factor |
| Author Name | Affiliation | E-mail | | YU Sha-sha | Faculty of Natural Resource and Environment, Jilin Agricultural University, Changchun 130118, China | | | DOU Sen | Faculty of Natural Resource and Environment, Jilin Agricultural University, Changchun 130118, China | dousen@tom.com | | HUANG Jian | Jilin Soil and Fertilizer Station, Changchun 130118, China | | | YANG Jing-min | Faculty of Natural Resource and Environment, Jilin Agricultural University, Changchun 130118, China | | | SHI Ying | Environmental Monitoring Station of Changchun City, Luyuan District, Changchun 130062, China | | | ZHENG Hai-hui | Meihekou City Terminus of Agro-technical Popularization, Meihekou 135000, China | |
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| Abstract: |
| Soil carbon pool is a major component of terrestrial carbon storage. Organic carbon in cultivated topsoils is most vulnerable to human activities. Here we calculated soil organic carbon density and storage in cultivated topsoils(0~20 cm) and their spatial distribution in Jilin Province using 2010 cultivated soil fertility evaluation data and 1:500 000 soil map and combining ARCGIS and SPSS analysis. Correlation analysis between soil organic carbon content and temperature, annual precipitation, soil pH and CEC was also performed. Average organic carbon density and total organic carbon storage of cultivated topsoils in Jilin Province was 3.95 kg·m-2 and about 2.06 × 1011 kg, respectively. Soil organic carbon density showed a decreasing trend from east (4.94 kg·m-2) to west(3.22 kg·m-2). Soil organic carbon content had no significant correlation with annual temperature, but was significantly positively correlated with annual precipitation and soil cation exchange capacity. A significantly negative correlation was found between soil organic carbon and soil pH. Soil organic carbon storage of dark-brown earths, albic soils, black soils, chernozem and meadow soils accounted for 75.37% of the total topsoil organic carbon pool in this region. The present results indicate that the annual precipitation, pH and CEC are main factors influencing topsoil organic carbon content. |
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