文献类型： 外文期刊

作者： Guo, L. ¹ ; Falloon, P. ² ; Coleman, K. ² ; Zhou, B. ³ ; Li, Y.; Lin, E.; Zhang, F.;

作者机构： 1.Chinese Acad Agr Sci, Inst Agroenvironm & Sustainable Dev, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Inst Agroenvironm & Sustainable Dev, Beijing 100081, Peoples R China; Hadley Ctr Climate Predict & Res, Meteorol Off, Exeter EX1 3PB, Devon, England; Rothamsted Res, Agr & Environm Div, Harpenden AL5 2JQ, Herts, England; Heilongjiang Acad Agr Sci, Harbin 150000, Peoples R China; China Agr Univ, Dept Plant Nutr, Beijing 100094, Peoples R China

3.Chinese Acad Agr Sci, Inst Agroenvironm & Sustainable Dev, Beijing 100081, Peoples R China; Hadley Ctr Climate Predict & Res, Meteorol Off, Exeter EX1 3PB, Devon, England; Rothamsted Res, Agr & En

关键词： RothC model;model performance;soil organic carbon;long-term experiment;northern China

期刊名称：SOIL USE AND MANAGEMENT （ 2020影响因子：2.95； 五年影响因子：3.109 ）

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收录情况： SCI

摘要： Arable land can be either a source or a sink for atmospheric carbon dioxide depending on its management. It is important to assess changes in soil organic carbon (SOC) under future climate change scenarios using models at regional or global scales. This paper aims to calibrate the RothC model on non-waterlogged soils in northern China to obtain the necessary mode! input parameters for later use in large-scale studies. Data sets from three long-term experiments in northern China were used to evaluatethe performance of the RothC soil carbon turnover model. The plant carbon input rate, an important model input parameter, was calibrated using experimental data under typical rotation systems with different fertilization. The results showed that RothC accurately simulated the changes in SOC across a wide area of northern China (northeast, north, and northwest China. The modelling error expressed as root mean square error for four treatments (nil, manure, fertilizer, fertilizer + manure) at three sites were less than 20.2%, and less than 7.8% if occasional extreme measured values were omitted. The simulation biases expressed as M (i.e. relative error) for all treatments at the three sites were non-significant. Observed trends in SOC included a decreasefor the nil (no fertilizer or manure) treatment and an increase for the treatments which received both manure and fertilizers. The experiments also indicated that manures applied at an appropriate rate were more effective in increasing or maintaining SOCthan fertilizers which were more effective in increasing crop yields.