Research Progress of Agricultural Soil Carbon Sink

doi:10.11924/j.issn.1000-6850.casb2022-0370

Abstract

Abstract:

The soil carbon pool accounts for more than 90% of the terrestrial ecosystem carbon pool, and the carbon content of the soil carbon pool is 3-4 times that of the vegetation carbon pool and 2-3 times that of the atmospheric carbon pool. To fully explore the huge benefits of reducing carbon emission and increasing carbon sink of soil carbon pool and realize the goal of carbon neutrality before 2060, this paper summarized research progress of agricultural soil carbon sink. In soil carbon pool, agricultural soil carbon sink has great emission reduction potential and emission reduction cost advantages, and is an important way to deal with climate change. Although the potential of soil carbon sink is considerable, current research on soil carbon sink is still sluggish. At present, the research on agricultural soil carbon sink is faced with three main challenges: lack of comprehensive viewpoint and with insufficient carbon emission calculation indexes; the research content cannot keep pace with the time; and the spatial variation analysis cannot reveal the source difference of soil carbon sink. In order to exploit the huge emission reduction and sink benefits of soil carbon pool, this paper provides an overview of agricultural soil carbon sink from four perspectives, specifically: an overview of agricultural soil carbon sink in terms of its impact on peaking carbon emissions and realizing carbon neutrality; a review of agricultural soil carbon emission and carbon reduction measures from three aspects of agricultural soil carbon emission and its causes, regional differences and dynamics of agricultural soil carbon emission, and agricultural soil carbon sink and its reduction effect; suggestions for research directions and strategies of agricultural soil carbon sink; and an outlook on agricultural soil carbon sink. This study will provide a theoretical basis for reducing carbon emissions from agricultural soils and for establishing a sound and green low carbon cycle development system.

Key words: agricultural soil, carbon sink, carbon emission, peaking carbon emissions, carbon neutrality

YUAN Mingrui, YANG Fengshan, CAI Baiyan, FU Haiyan, LIU Chunguang. Research Progress of Agricultural Soil Carbon Sink[J]. Chinese Agricultural Science Bulletin, 2023, 39(8): 37-42.

Figures/Tables 1

References 55

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