| 魏万成,戴飞,张锋伟,张仕林,史瑞杰,刘元祥.西北旱区玉米不同覆膜方式下土壤水热效应数值模拟研究[J].干旱地区农业研究,2020,38(1):13~21 |
| 西北旱区玉米不同覆膜方式下土壤水热效应数值模拟研究 |
| Numerical simulation on soil water\|thermal effect under different film mulching methods of maize in the arid of Northwest China |
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| DOI：10.7606/j.issn.1000-7601.2020.01.02 |
| 中文关键词: 覆膜方式 玉米 全膜双垄沟播 土壤水热效应 西北旱区 |
| 英文关键词:film mulching methods maize whole plastic\|film mulching on double ridges soil water\|thermal effect Northwest China |
| 基金项目:国家自然科学基金（51775115，51405086）；甘肃省科技重大专项计划项目（18ZD2NJ021） |
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| 中文摘要: |
| 为了进一步探明西北旱区玉米在不同覆膜方式下土壤水热效应规律以及保温保水性能,采用数值模拟的方法通过ABAQUS软件分别建立了露地平作、全膜平作、单垄覆膜、全膜双垄沟播4种覆膜方式下的土壤模型，并对不同覆膜方式下玉米出苗期土壤热平衡和降雨入渗进行了数值模拟试验。通过热平衡模拟得出,起垄和覆膜改变了土壤剖面温度和热通量分布，增加了表层温度和热传递能力。在40 cm土层范围内全膜平作模式下垄沟内土壤平均温度最高，为24.1℃，其次为全膜双垄沟播模式，但全膜双垄沟播模式下温度变化趋势最为缓慢，稳定性最好。降雨入渗模拟结果表明：降雨结束后全膜双垄沟播模式产生了明显的侧渗现象，垄沟内土壤平均含水率最高，为19%，高于其他3种模式。研究表明在玉米出苗期全膜双垄沟播技术保水和保温性达到最佳。 |
| 英文摘要: |
| In order to explore the thermal effect and regularity of soil water and water preservation performance of maize under different mulching modes, and by means of numerical simulation experiment, the soil model of four kinds of mulching modes of flat\|planting without mulching, complete mulching, and flat\|planting, single ridge mulched with plastic film, and whole plastic\|film mulching on double ridges planting was established by ABAQUS software, and the soil thermal balance and rainfall infiltration in corn seedling stage under different laminating modes were simulated. The results of thermal equilibrium simulation showed that the ridge and mulch changed the distribution structure of soil temperature and heat flux, and increased the surface temperature and heat transfer capacity. The average temperature in the complete mulching and flat\|planting mode was the highest (24.1℃）, in the range of 40 cm soil layer the temperature change trend was the slowest and most stable under the whole plastic\|film mulching on double ridges mode. The simulation results of rainfall infiltration showed that the whole plastic\|film mulching on double ridges mode produced obvious lateral seepage, and the average water content of maize in the furrow was the highest (19%)，higher than the other three modes. The final results showed that the water preservation performance of the whole plastic\|film mulching on double ridges technique was the best at the corn seedling stage. |
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