Authors

Abstract

In order to solve the problems of crop residue clogging, poor soil crushing and low operation efficiency under the stalks mulching condition, the traction combined machine for subsoiling and land preparation was designed. The optimization test was carried out to optimize the stalk cutting device and the soil crushing device under stalk mulching condition. The optimization test used a randomized complete block design, consisting of 10 treatments, in a 5 × 2 factorial arrangement. Each treatment included the combination of coulter types (8W, 13W, 18W, 25W and NW) and soil crushing roller types (with blade angle and without blade angle). The results showed that the combination of the fluted coulters with 8 waves and the soil crushing roller with blade angle was optimal. Finally, the verification test of the whole machine was carried out to evaluate the performance, and the results showed that the average value of subsoiling depth was 35.8 cm, the stability coefficient of subsoiling depth was 93.9% and the soil crushing rate was 53.7%. This research provides an important reference for the structure design of the large multi-functional combined machine for conservation tillage.

Abstract in Chinese

为解决秸秆覆盖条件下深松作业缠绕堵塞严重，以及作业效率低等问题，研制了牵引式深松整地机，包括新型切茬松土装置、仿形碎土装置、液压控制系统和变施肥控制系统。通过田间优化试验探究全量秸秆覆盖条件下新型切茬松土装置和仿形碎土装置对整机性能的影响，试验因素包括耕刀类型（8W, 13W, 18W, 25W and NW）和碎土轮类型（有叶片倾角和无叶片倾角两种），优化试验结果表明，8波纹的犁刀与带叶片角的碎土辊组合使用效果最佳。最后进行了整机田间验证试验，结果表明：平均深松深度为35.8 cm，深松稳定系数为93.9%，土壤破碎率为53.7%，该研究为保护性耕作条件下的大型深松整地联合作业机设计提供参考。