超高地隙风幕式喷杆喷雾机施药性能试验

Experiment on Spraying Performance of Super-high Clearance Boom Sprayer with Air-assisted System

对超高地隙自走式喷杆喷雾机风幕系统进行田间试验,研究了喷雾压力、喷雾机作业速度、风幕出口风速及植物冠层特性对雾滴沉积量、沉积量均匀程度以及飘移率的影响。研究结果表明,风幕出口风速是雾滴沉积量、沉积均匀程度和飘移率的决定因素,风幕出口风速与雾滴穿透性能呈正相关关系,风幕系统能够有效地减少雾滴的飘移;植物冠层的特性对雾滴穿透性能有较显著影响;相同作业速度时,增大喷雾压力可使雾滴单位面积沉积量增加,提高喷雾沉积效果,但对穿透性能影响不大;喷雾机作业速度对雾滴沉积量也有一定的影响,但影响较小。

Various field experiments were conducted in order to measure the performance of air-assisted spraying system on super-high clearance sprayer.The effects of spray pressure and speed of sprayer,air flow rate of air curtain and plant canopy characteristics on droplet distribution,deposition uniformity and droplet drift were studied.The experiment results indicated that droplet drift could reduce obviously with air-assisted spraying system.It also showed that air flow rate of air-assisted was the determinant factor,and the penetrability and deposition of droplets had positive correlation.Plant canopy characteristics had significant effect on droplet deposition.The deposit rate increased and the effect of deposition improved with the same sprayer speed when the spray pressure increased.However,it has no obvious effect on penetration of droplet.The speed of sprayer had no obvious effect on the droplet deposition.