| 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 |
| Key Words: film mulching methods maize whole plastic\|film mulching on double ridges soil water\|thermal effect Northwest China |
| Author Name | Affiliation | | WEI Wancheng | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | DAI Fei | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Fengwei | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Shilin | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | SHI Ruijie | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | LIU Yuanxiang | Mechanical and Electrical Engineering College, Gansu Agriculture University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| 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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