Carbon decomposition and nitrogen mineralization in Marsden agroecosystem diversification experiment, Iowa, 2021

This dataset contains measurements of soil carbon decomposition and nitrogen mineralization from 36 soils in the Marsden agroecosystem diversification experiment. Soil samples were collected in fall 2021 from a long-term experiment initiated in 2002 at Iowa State University's Marsden Farm. The dataset includes laboratory data on soil organic carbon (SOC) content, soil total nitrogen content, the carbon-to-nitrogen ratio of soil, time-series CO2 fluxes from SOC decomposition in a 13.5-month lab incubation, and soil nitrogen mineralization rates. It also provides model simulations of SOC decomposition from different carbon pools using three process-based models: the Agricultural version of the Integrated Biosphere Simulator (Agro-IBIS), CN-SIM, and the Microbial-ENzyme Decomposition (MEND) models.

本数据集收录了马斯登（Marsden）农业生态系统多样化试验中36份土壤样品的土壤碳分解与氮矿化测定数据。土壤样品于2021年秋季采集自爱荷华州立大学（Iowa State University）马斯登农场（Marsden Farm）于2002年启动的长期定位试验。本数据集包含实验室测定的土壤有机碳（soil organic carbon, SOC）含量、土壤全氮含量、土壤碳氮比、13.5个月实验室培养过程中土壤有机碳分解产生的时间序列CO₂通量，以及土壤氮矿化速率。此外，本数据集还提供了采用3种基于过程的模型对不同碳库下土壤有机碳分解过程进行模拟的结果，涉及的3种模型分别为：农业版集成生物圈模拟器（Agricultural version of the Integrated Biosphere Simulator, Agro-IBIS）、CN-SIM模型，以及微生物-酶分解模型（Microbial-ENzyme Decomposition, MEND）。