Biochar as a global change adaptation: predicting biochar impacts on crop productivity and soil quality for a tropical soil with the Environmental Policy Integrated Climate (EPIC) model

摘要: The Environmental Policy Integrated Climate (EPIC) model with newly-developed biochar algorithms was used to determine the impacts of amendments on corn (Zea mays L.) yields, soil cation exchange capacity (CEC), pH, bulk density (Db) and organic carbon (SOC) dynamics. objectives were (1) crop yields properties a tropical (2) evaluate biochar’s potential as climate change adaptation tool. EPIC validated using results 4−yr experiment performed an Amazonian Oxisol amended at rates 0, 8, 20 Mg ha−1. Simulated significantly greater than control (p < 0.05). pH increased from original 3.9 4.19, CEC 9.76 11.5 cmolc kg−1, SOC also increased. After validation, simulate same applied 4 year intervals over next 20 years. Soil 11.1 kg−1 20.2 cmolc for highest application rate. 5.64. up 2.59 % rate decreased topsoil Db 1.11 Mg m−3 0.97 Mg m−3. Long-term slightly decreased. Although are biochar-, dose-, soil-specific, additions soils hold promise tool resulting in sequestration improved properties.