无人机喷雾作业定高对雾滴在竹林中沉降分布及防效的影响

为探究无人机低空喷雾不同作业高度对雾滴在竹林中沉降分布及防效的影响，揭示无人机喷雾施药关键技术，在福建省三明市沙县区建立试验区，运用无人机开展喷雾施药防治试验。结果表明：无人机喷雾作业定高对雾滴在竹林中的沉降分布影响较大，当无人机作业高度为6.5 m时，其雾滴在林冠的沉降率和覆盖密度的水平分布与垂直分布最佳，雾滴在林冠层的穿透性最强，有效喷幅最大，喷药后的防治效果最理想。无人机在竹林喷雾作业最佳定高为6.5 m。

Effect of Height Setting of UAV Spraying Operation on Distribution and Control Effect of Droplet Deposition in Bamboo Forest

In order to understand the influence of low-altitude spraying of unmanned aerial vehicle (UAV) at different altitudes on the distribution and control effect of droplet deposition in bamboo forest and reveal the key technology of UAV spray application, an experimental area is established in Shaxian county of Sanming city, Fujian province, to experiment on the spraying control by unmanned aerial vehicle. The results show that the height of UAV spraying operation has the greatest influence on the distribution of droplet deposition in bamboo forest. When the height of UAV is 6.5 m, the horizontal and vertical distributions of droplets deposition rate and coverage density are the optimal, the penetration of droplets in forest canopy is the strongest, the effective spraying range is the largest, and the control effect after spraying is the best. The optimum height of UAV in bamboo forest should be set at 6.5 m.