基于DRAINMOD模型的不同灌排模式稻田水氮运移模拟

• Published in: Guanʻgai paishui xuebao Vol. 40; no. 4; pp. 37 - 44
• Main Authors: XIE Yangcun, XU, Min, GAO Shikai, Shen Lianqi
• Format: Journal Article
• Language: Chinese
• Published: Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 01.04.2021; 生态环境部环境规划院,北京100000%华北水利水电大学水利学院,郑州450046%寿光市水利局,山东寿光262700
• Subjects: Agricultural ecosystems; Agricultural runoff; Ammonium; Contaminants; Crop production; Diffusion coefficient; Diffusion layers; Drainage; Drainage measurement; Ecosystem management; Emissions; Environmental management; Environmental perception; Farming systems; Hydrologic models; Irrigation; Nitrification; Nitrogen; Nonpoint source pollution; Organic matter; Parameter sensitivity; Pollution sources; Pollution transport; Rice fields; Runoff; Soil layers; Soil organic matter; Soil water movement; Water conservation; Water flow; Water management; Water pollution; 水稻; 控制灌排; 水氮动态; DRAINMOD模型; 灵敏度
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2020519

【目的】研究不同灌排模式稻田水氮动态变化，为南方稻作区节水减排提供科学依据。【方法】基于实测的田间灌排水量及氮素变化数据，采用Morris方法检测DRAINMOD模型水氮运移相关参数的灵敏度，并利用DRAINMOD模型对传统灌排模式和控制灌排模式下稻田水氮动态进行模拟。【结果】20~40 cm土层侧向饱和导水率对稻田水分运移模拟结果影响最大，弥散系数、反硝化参数、硝化反应参数、有机质适宜分解温度对稻田氮素运移模拟结果影响较大；DRAINMOD模型能够较好地模拟不同灌排模式稻田水氮动态变化、灌排水量、氮素径流总负荷模拟值与实际值差别小于11%；与传统灌排模式相比，控制灌排模式排水量减少33.0%~72.6%，灌水量减少9.7%~37.1%，铵态氮径流负荷减少43.6%~45.0%，硝态氮径流负荷分别减少29.8%~53.1%。【结论】控制灌排模式稻田节水减排效果较好，利用 DRAINMOD模型进行不同灌排模式稻田水氮动态模拟可行有效。