Authors

Abstract

This study developed a lift-type winged chisel plow-straw-soil interaction model, and its validity was confirmed through multiple experimental indicators obtained from both soil bin tests and simulation experiments. The Discrete Element Method (DEM) was employed to analyze soil disturbance behavior and straw incorporation performance. Results showed that the plow tip of the lift-type winged chisel plow effectively sheared, loosened, and fractured the plow pan soil, while the soil-lifting plate pushed and turned the soil, promoting thorough mixing of straw and soil. Compared to traditional designs, the addition of wings increased the working width, and the soil-lifting plate significantly enhanced the frequency of straw–soil disturbance and soil fragmentation - resulting in a mixing rate of 42.98% and a uniformity rate of 92%.

Abstract in Chinese

秸秆混埋是保护性耕作技术的重要实践，本研究建立了抬土式带翼凿式犁-秸秆-土壤相互作用模型，通过土槽实验和仿真实验中的多试验指标（秸秆的正向和侧向位移、牵引力、秸-土混埋率）证明了模型的合理性。采用DEM研究其对土壤的扰动行为和秸秆的混埋行为，考察了抬土式带翼凿式犁作业过程中，不同时刻、不同位置的秸秆-土壤的运动状态和对秸秆-土壤微扰动的影响。结果表明：抬土式带翼凿式犁的铲尖剪切、松动、破碎犁底层土壤；抬土板推移、翻动、混合秸秆-土壤。相比于传统的凿式犁相比，铲翼提升了作业宽度，同时抬土板增加了其对秸秆-土壤的扰动次数和土壤的破碎程度，混埋率提高到42.98%，秸-土混合均匀度提高到92%。模拟结果对评估秸秆混埋工具的设计方案和评价抬土式带翼凿式犁的残茬管理实践是有用的。