【摘要】 深松铲横向间距是影响深松作业效果的主要因素之一,对土壤水分入渗性能产生重要影响。为此,以箭型深松铲为对象,综合应用离散元仿真、Hydurs2D数值模拟和田间试验,研究不同铲距对土壤垂直剖面内水分入渗特性的影响。结果表明:离散元仿真及Hydrus2D的模拟值和实测值拟合程度较好;铲距对土壤水分入渗速率有重要影响,铲距增加会引起土壤扰动面积增大,加速水分入渗;湿润锋垂直运移距离随着铲距的增加略有波动,整体呈减小趋势;通过调整铲距可以改变土壤水分富集区的位置。在农业生产中,可根据作物需水特性选择合适的铲距,以提高深松土壤水分的利用效率和效益。更多还原

【Abstract】 Theine space is one of the main factors affecting the subsoiling, which has an important impact on soil-water infiltration. In this paper, the arrow type subsoiler is used as the object. The discrete element simulation, Hydurs2 D numerical simulation and field experiment are used to study the influence of the tine spacing on the water infiltration characteristics in the vertical section of the soil. The results showed that the simulated and measured values of DEM and Hydrus2 D are better. The tine spacing has an important influence on the soil-water infiltration rate. The increase of the tine spacing will increase the soil disturbance area and accelerate the water infiltration. The vertical migration distance of the wetting front fluctuates slightly with the increase of the tine spacing, and the overall trend is decreasing. By adjusting the tine spacing, the position of the soil-water enrichment area can be changed. In agricultural production, the appropriate tine spacing should be selected according to the water demand characteristics of crops to improve the utilization efficiency of subsoiling soil moisture.更多还原