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首页> 外文期刊>Mitigation and Adaptation Strategies for Global Change >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
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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

机译：生物炭作为全球变化适应措施：使用环境政策综合气候（EPIC）模型预测生物炭对热带土壤对作物生产力和土壤质量的影响

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摘要

The Environmental Policy Integrated Climate (EPIC) model with newly-developed biochar algorithms was used to determine the impacts of biochar amendments on corn (Zea mays L.) yields, soil cation exchange capacity (CEC), pH, bulk density (D-b) and soil organic carbon (SOC) dynamics. The objectives were (1) to determine biochar impacts on crop yields and soil properties of a tropical soil and (2) to evaluate biochar's potential as a climate change adaptation tool. EPIC was validated using results of a 4-yr experiment performed on an Amazonian Oxisol amended with biochar at rates of 0, 8, and 20 Mg ha(-1). Simulated yields of corn on biochar amended soil were significantly greater than control yields (p 0.05). Simulated soil pH increased from original 3.9 to 4.19, CEC increased from 9.76 to 11.5 cmol(c) kg(-1), and SOC also increased. After validation, EPIC was used to simulate the impacts of the same biochar rates applied at 4 year intervals on corn yields and soil properties over the next 20 years. Soil CEC increased from 11.1 cmol(c) kg(-1) to 20.2 cmol(c) kg(-1) for the highest biochar application rate. Soil pH increased from 3.9 to 5.64. SOC increased up to 2.59 % for the highest biochar application rate with decreased topsoil D-b from 1.11 Mg m(-3) to 0.97 Mg m(-3). Long-term corn yields were slightly decreased. Although the results are biochar-, dose-, and soil-specific, biochar additions to tropical soils hold promise as a climate change adaptation tool resulting in increased soil carbon sequestration and improved soil properties.
机译：使用具有最新开发的生物炭算法的环境政策综合气候（EPIC）模型来确定生物炭改良剂对玉米（Zea mays L.）产量，土壤阳离子交换能力（CEC），pH，体积密度（Db）和土壤有机碳（SOC）动力学。目标是（1）确定生物炭对热带土壤的作物产量和土壤特性的影响，以及（2）评估生物炭作为气候变化适应工具的潜力。 EPIC使用在亚马逊Oxisol上进行了4年实验的结果进行了验证，该Oxisol用生物炭以0、8和20 Mg ha（-1）的速率进行了修正。在生物炭改良土壤上模拟的玉米单产显着高于对照单产（p <0.05）。模拟的土壤pH从原来的3.9增加到4.19，CEC从9.76增加到11.5 cmol（c）kg（-1），SOC也增加。验证之后，EPIC被用来模拟在接下来的20年中，每隔4年应用相同生物炭比率对玉米产量和土壤特性的影响。为获得最高的生物炭施用率，土壤CEC从11.1 cmol（c）kg（-1）增加到20.2 cmol（c）kg（-1）。土壤pH从3.9增加到5.64。对于最高的生物炭施用率，SOC增加至2.59％，表土D-b从1.11 Mg m（-3）降低至0.97 Mg m（-3）。长期玉米单产略有下降。尽管结果是针对生物炭，剂量和土壤的，但向热带土壤中添加生物炭有望成为一种气候变化适应工具，从而增加土壤碳固存并改善土壤性质。

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