基于HYDRUS-2D/3D的玉米全膜双垄沟水肥运移规律与根系响应

邓欢; 戴飞; 史瑞杰; 王锋; 宋学锋; 赵武云

基于HYDRUS-2D/3D的玉米全膜双垄沟水肥运移规律与根系响应

甘肃农业大学机电工程学院

基金项目:

国家自然科学基金项目(52065005、51775115)

甘肃省杰出青年基金项目(20JR10RA560)

中国博士后科学基金项目(2021M700741)

甘肃省自然科学基金项目(20JR5RA029)

详细信息

作者简介:
邓欢(1997—),男,硕士生,主要从事西北旱区膜土-机器-植物互作系统研究,E-mail:1755288015@qq.com

通讯作者:
戴飞(1987—),男,副教授,博士,主要从事西北旱区膜土-机器-植物互作系统研究,E-mail:daifei@gsau.edu.cn

中图分类号: S513
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出版历程
- 收稿日期: 2022-06-01
- 刊出日期: 2022-11-17

Water and Fertilizer Transport Law and Root Response of Maize in Full-film Double Furrows Based on HYDRUS-2D/3D

College of Mechanical and Electrical Engineering, Gansu Agricultural University

摘要

摘要: 为研究西北旱区玉米全膜双垄沟种植模式下土壤水肥运移规律，通过HYDRUS-2D/3D模型对甘肃省定西市玉米全膜双垄沟土壤水肥运移规律及根系响应进行数值模拟，分析全膜双垄沟播种植模式下土壤含水率及垄沟内种肥浓度的分布规律，在合理播深处设置观测点以表征土壤含水率及膜下氮、磷、钾水肥互作运移变化规律。模拟结果表明，全膜双垄沟膜下渗水孔与种穴位置处土壤水肥发生环状侧渗现象，其中土壤含水率范围为15.20%～17.12%,垄沟内氮肥转化浓度趋于15.38 mg/L,磷肥转化浓度趋于5.15 mg/L,钾肥转化浓度趋于12.21 mg/L,水肥主要集中在垄沟位置，保障了苗期水肥需求；通过施加根系吸水和水肥运移模拟表明全膜双垄沟模式下土壤水肥条件满足玉米出苗需求。研究模型与结果将为玉米全膜双垄沟农艺技术的优化提升提供理论依据。
- 玉米全膜双垄沟 /
- HYDRUS-2D/3D /
- 土壤水肥运移
Abstract: In order to study the law of soil water and fertilizer transport under the corn full film double ridge planting mode in northwest arid area, the HYDRUS-2 D/3 D model was used to numerically simulate the law of soil water and fertilizer transport and root response of corn full film double ridge planting mode in Dingxi City, Gansu Province, the distribution law of soil water content and seed fertilizer concentration in the ridge under the full film double ridge planting mode was analyzed, and observation points at reasonable sowing depths were set to characterize the interaction law of soil water content, nitrogen phosphorus and migration of potassium, water and fertilizer. The simulation results showed that the circular lateral infiltration of soil water and fertilizer occurred at the infiltration holes and seed holes of full film double ridge and furrow, in which the fluctuation range of soil moisture content was 15.20%～17.12%, the concentration value of nitrogen fertilizer transformation in the ridge and furrow tended to be 15.38 mg/L, the concentration value of phosphorus fertilizer transformation tended to be 5.15 mg/L, and the concentration value of potassium fertilizer transformation tended to be 12.21 mg/L. Water and fertilizer were mainly concentrated in the ridge and furrow, which ensured the water and fertilizer demand at the seedling stage. The simulation of root water uptake and water and fertilizer transport showed that the soil water and fertilizer conditions under the full film double ridge and ditch mode met the needs of maize seedling emergence. The research model and results would provide a theoretical basis for the optimization and improvement of maize full film double ridge and furrow agronomic technology.
- corn full film double ridge and ditch /
- HYDRUS-2D/3D /
- soil water and fertilizer transport

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参考文献(27)

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