JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (4): 596-607.doi: 10.11849/zrzyxb.2013.04.006

• Resources Ecology • Previous Articles     Next Articles

Organic Carbon Storage and Sequestration Potential in Cropland Surface Soils of Songnen Plain Maize Belt

REN Chun-ying1, ZHANG Chun-hua2, WANG Zong-ming1, ZHANG Bai1   

  1. 1. Northeast Institute of Geography and Agroecology, CAS, Changchun 130102;
    2. International Institute for Earth System Science, Nanjing University, Nanjing 210093, China
  • Received:2012-05-26 Revised:2012-10-20 Online:2013-04-20 Published:2013-04-20

Abstract:

Organic carbon storage and sequestration potential in agricultural soils is suggested to be an important issue in the study of terrestrial carbon cycling and global climatic change.In this study, soil organic carbon storage and cropland surface soil carbon pool saturation levels in different counties as well as soil carbon sequestration potential and difference between upland and paddy field in carbon sequestration potential in Songnen Plain maize belt were investigated by using the data from the Second State Soil Survey carried out during 1979-1982 and from cropland investigation and quality evaluation project in Jilin Province during 2003-2006. Results showed that soil organic carbon storage increased 7.20 TgC from 1980 to 2005. In terms of soil carbon pool saturation levels, Dehui County showed the highest value of 4.11 kgC·m-2 among the four counties, and Jiutai County followed with the lowest in Gongzhuling County. Assuming the land use, tillage, fertilization and climatic conditions of the cropland remain the same as they were in 1980, the soil carbon sequestration potential of the cropland of Songnen Plain maize belt would be 8.17 TgC. In terms of per unit area soil carbon sequestration potential, Jiutai County showed the highest value of 0.77 kgC·m-2, followed by Nong’an County, and Dehui and Gongzhuling counties were lower than the study area of 0.63 kgC·m-2. Soil carbon pool saturation levels of upland and paddy field were nearly equal.

Key words: carbon sequestration potential, soil organic carbon storage, cropland surface soil, Songnen Plain maize belt

CLC Number: 

  • S159.2