2026-10-11T10:38:44Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34002909 2026-09-26T13:06:54Z category_23857 category_26986 item_type_3 month_year_09_2026

Datasets:China’s cropland soil carbon accrual shifts from climatic–edaphic constraints to management control after one decade Yalong Liu (24844720) Agricultural land management Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) China Soil organic carbon Cropland management Carbon sequestration SOC saturation Climate–soil interactions Fertilization <p dir="ltr">Cropland soils are central to climate mitigation and food security, yet it remains unclear how the controls of soil organic carbon accrual change as management effects accumulate over time. Here we synthesize chronosequence data from 194 publications, covering 1,324 observations from 173 sites across China’s croplands, to assess how climate, soil properties and management regulate topsoil carbon change over four decades. We identify a decadal transition in soil carbon accrual. During the first decade, carbon responses are rapid but strongly constrained by climate and initial soil conditions, with divergent trajectories among climatic regions. After one decade, accrual slows and management becomes the dominant control, while climate acts mainly through its interactions with soil properties. Across all observations, topsoil carbon concentrations increased by 19.2%, with the largest gains under moderate temperature and precipitation regimes. Paddy systems and organic inputs promoted early carbon gains, whereas balanced NPK fertilization showed the most persistent longer-term effect. These results show that cropland carbon sequestration depends on time-specific controls and requires management strategies that differ between early rapid-accrual and later stabilization phases.</p> 2026-09-26T13:06:54Z Dataset Dataset 10.6084/m9.figshare.34002909.v1 https://figshare.com/articles/dataset/Datasets_China_s_cropland_soil_carbon_accrual_shifts_from_climatic_edaphic_constraints_to_management_control_after_one_decade/34002909 CC BY 4.0