Authors

Abstract

This study aims to evaluate the effects of different parameter settings on the ditching performance using a ditching-fertilizer. We aimed to improve the performance of ditching-fertilizer machine performance in sustainable agriculture. With Box-Behnken experimental design method, taking forward speed, the rotation speed of the ditching cutter, and the deflection angle of ditching cutter as experimental factors, taking ditching depth stability and soil coverage rate as test indexes, the operation parameters of orchard ditching-fertilizer machine are studied. The regression model between test indexes and experimental factors is established, and the influence of each factor on the experimental indexes is analyzed. The test factors are comprehensively optimized. The results show that when the forward speed is 0.8km/h, the rotation speed of the ditching cutter is 348r/min, and the deflection angle of the ditching cutter is 32°, the ditching effect is the best. At this time, the stability coefficient of the ditching depth is 98.33%, and the soil coverage rate is 81.53%. As for the field test, which measured the stability coefficient of ditching depth, and the average soil cover rate is 96.24%, and 79.14%, respectively, and the relative errors from the optimized value are 2.17%, and 3.02%, respectively.

Abstract in Chinese

针对果园开沟作业存在开沟深度稳定性差、覆土率低等问题，基于离散元仿真开展果园开沟施肥机开沟作业参数优化试验，以探究整机作业工况下开沟装置作业参数对开沟深度稳定性、覆土率的影响规律。应用Box-Behnken试验设计方法，以前进速度、开沟刀转速、开沟刀偏转角为试验因素，以开沟深度稳定性、覆土率为试验指标，对果园开沟施肥机作业的参数进行试验研究，建立了试验指标与试验因素之间的回归模型，分析了各因素对试验指标的影响，并对试验因素进行了综合优化。结果表明，当前进速度为0.8km/h、开沟刀转速为348r/min、开沟刀偏转角为32°时，开沟深度稳定性达到98.33%、覆土率达到81.53%。田间试验实测开沟深度稳定性、覆土率平均值分别为96.24%和79.14%，与优化值相对误差分别为2.17%和3.02%。研究结果可为果园开沟装置的结构改进和开沟作业参数控制提供参考。