农业机械学报2024，Vol.55Issue(9)：138-150,184,14.DOI:10.6041/j.issn.1000-1298.2024.09.011
基于离散元的肥料流重构玉米分层施肥装置设计与试验
Design and Experiment of Corn Layer Fertilization Device with Fertilizer Flow Reconstruction Based on Discrete Element Method
摘要
Abstract
To enhance the accuracy of proportional fertilizer distribution for corn layered fertilization and the stability of soil coverage between layers,a layered fertilizer flow reconstruction apparatus was developed.The optimal diameter of the circular bulk fertilizer disc was determined to be 20 mm by using the discrete element method.Subsequently,a comparative test was carried out between fertilizer flow reconstruction and non-reconstruction.The results demonstrated that after fertilizer flow reconstruction,the operational efficiency was improved,and the stability of both 7:3 and 8:2 ratio fertilizers was enhanced.By conducting kinematic analysis of ditching for layered fertilization,it was established that the trencher's angle,the lateral distance of the shallow fertilizer opening,and the machine's operating speed were key factors influencing the efficacy of layered fertilization.A regression model was formulated to correlate the variation coefficient of each factor with the depth of deep and shallow fertilizers.The impact of the interaction of each factor on the test index was then analyzed by using the response surface method.By using the multi-objective optimization design method,the optimum operation parameter insertion angle of the layered fertilizer applicator was 39°,the transverse spacing was 174 mm,and the operation speed was 4.3 km/h.Based on the optimized parameters,the layered fertilization device was manufactured,and field tests were conducted.The results revealed that the variation coefficient of deep fertilizer depth was 4.78％,while that of shallow fertilizer was 6.41％.The stratified fertilization operation exhibited stability and reliability.The research result can offer a theoretical and methodological foundation for the design of layered fertilization devices.关键词
玉米/肥料流重构/分层施肥装置/离散元Key words
corn/fertilizer flow reconstruction/layer fertilizer device/discrete element method分类
农业科技引用本文复制引用
王守江,颜丙新,李立伟,董建军,武广伟..基于离散元的肥料流重构玉米分层施肥装置设计与试验[J].农业机械学报,2024,55(9):138-150,184,14.基金项目
国家重点研发计划项目(2023YFD1701000)、国家农业重大科技项目(20221805)和财政部和农业农村部:国家现代农业产业技术体系项目(CARS-02) （2023YFD1701000）
