中耕作物精准穴施肥控制机构工作参数优化与试验

Working Parameters Optimization and Experiment of Precision Hole Fertilization Control Mechanism for Intertilled Crop

摘要:

为增加中耕作物产量，有效提高肥料利用率，设计了玉米苗期自动穴施肥控制机构，通过土槽试验分析了穴施肥控制机构的结构和工作参数，研究了施肥传动机构工作参数对施肥控制精准度的影响规律。采用正交旋转组合试验，以动力输出轴转速、台车前进速度、触碰转针高度为影响因子，以穴株拟合度和伤苗率为响应函数，利用Design-Expert软件平台的回归分析法及响应面分析法，对3个因子进行单因素和多因素正交试验。结果表明：在台车前进速度为1.25m/s，动力输出轴转速为16.5r/min，触碰转针高度在5mm的条件下，穴株拟合度可达到0.796，伤苗率接近10%，参数优化结果满足玉米苗期施肥控制性能的要求。

Abstract:

In order to increase the yield of intertilled crops and enhance the effective utilization rate of fertilizer, a kind of corn automatic hole fertilization control mechanism for intertilled crop was designed. The structure and working parameters of hole fertilization control mechanism were analyzed by soil bin testing. The influence law of parameters of transmission mechanism on the accuracy of fertilizing control was studied. The orthogonal rotation combination method was used with the power output shaft speed, vehicle forward speed and seedling needle height as impact factors, the seedling injury rate and the fitting degree of holes and plants as response functions. The regression analysis of Design-Expert platform and the response surface method were used. The singlefactor and multifactor orthogonal experiment was carried out. The results showed that, when the vehicle forward speed was 1.25m/s, power output shaft speed was 16.5r/min, seedling needle height was 5mm, the fitting degree of holes and plants can reach to 0.796 and seedling injury rate was close to 10%. The optimized parameters can meet the requirements of corn fertilization during seedling stage.