中国农业科学2024，Vol.57Issue(10)：1943-1960,18.DOI:10.3864/j.issn.0578-1752.2024.10.008
黑土区保护性耕作土壤有机碳动态的模型模拟研究
Model Simulation Research of Soil Organic Carbon Dynamics of Long-Term Conservation Tillage in Black Soil
摘要
Abstract
[Objective]Conservation tillage is an important measure for restoring and enhancing soil fertility,and soil organic carbon(SOC)plays a crucial role in maintaining soil fertility,supporting crop growth,and protecting soil environment.However,there is currently a lack of long-term monitoring platforms for conservation tillage in China,so using modeling methods can help study SOC dynamics under long-term conservation tillage.[Method]A long-term tillage experiment was established in the black soil region in 2001 with three treatments:no-tillage(NT),moldboard plow(MP),and ridge-tillage(RT).The structures and parameters of process-based models(RothC,AMG model)and statistical models(MLPNN model)were optimized.The changes in SOC under long-term conservation tillage were simulated and compared.The effectiveness of different models in simulating and predicting the SOC dynamics under conservation tillage was evaluated,and the long-term response and influencing factors of SOC in black soil in Northeast China to conservation tillage were revealed.[Result]After optimizing parameters for carbon pool allocation,errors of the RothC and AMG models were significantly reduced.During the first 11 years(2001-2012)of conservation tillage,there was no significant difference in the simulation of SOC between RothC and AMG models,indicating that the structural complexity of process models does not have significant impacts on the simulation results for relatively short term.The simulation results of the statistical model MLPNN were similar to process models,proving the application of statistical models in small-scale regions.Over the next 100 years,RothC and AMG models predicted similar trends in SOC changes,but AMG model significantly overestimated the increase in SOC stocks,which may be attributed to SOC saturation and the influence of tillage practices.Both RothC and AMG models showed high sensitivity to carbon input,but they responded differently to climate and soil factor changes.[Conclusion]It is necessary to choose appropriate models based on local conditions while using models to simulate SOC in long-term conservation tillage.For short-term prediction of SOC under conservation tillage,a relatively simple AMG modelcan be used,while for long-term prediction,a more complex RothC model can be used.Under specific conditions,statistical models show similar effects to process models in simulating soil organic carbon at a small-scale regions,such as plots and fields.关键词
土壤有机碳/保护性耕作/模型模拟/黑土/过程模型/统计模型/东北Key words
soil organic carbon/conservation tillage/model simulation/black soil/process-based model/statistical model/Northeast China引用本文复制引用
王文俊,梁爱珍,张延,陈学文,黄丹丹..黑土区保护性耕作土壤有机碳动态的模型模拟研究[J].中国农业科学,2024,57(10):1943-1960,18.基金项目
中国科学院战略性先导科技专项(XDA28080200)、国家自然科学基金(42101277)、中国科学院黑土区重点实验室开放基金(2020ZKHT-06)、吉林省重大科技专项(20220302004NC)、吉林省自然科学基金(20230101085JC) （XDA28080200）
