M18系列飞机不同施药浓度下的雾滴沉积分布

Droplet Deposition Distribution in M18 Aircraft with Different Application Concentrations

针对航空施药中存在的雾滴飘移严重、利用率低等问题,对水稻田施药后药液的沉积分布进行了分析。通过M18系列飞机在水稻田进行田间试验,在施药作业中雾化喷头在50m/s的喷洒速度下,进行了3种不同的液体直径对雾滴的直径、数量和沉积密度的比较。结果表明:-40~50m的水敏纸均有药液沉积,主要集中在-25^-20m之间,且随着漂移距离的增加,药液沉积量逐渐减少。分析结果表明:3个采样区中液体直径越大,相应的雾滴粒径越大,雾滴数量越少,沉积点数主要分布在-25m和至0m范围内。本研究对合理喷施农药、提高喷洒效率、防治病虫害大面积暴发具有重要意义。

In order to solve the problems of serious droplet migration and low utilization rate in aeronautical pesticide application,the deposition distribution of pesticide solution in paddy field was analyzed.Based on the field test of M18 series aircraft in paddy field,the comparison of droplet diameter,quantity and deposition density of three different liquid diameters was carried out under the spraying speed of 50 m/s in the spraying operation.The results show that there is a concentration between-25 m and-20 m in water sensitive paper between-40 m and 50 m,and with the increase of drift distance,the amount of drug deposition decreases gradually.The results show that the larger the liquid diameter in the three sampling areas,the larger the droplet diameter and the smaller the number of droplets,and the more the number of droplets is distributed in the range of-25 m and-0 m.It is of great significance to apply pesticides rationally,improve spraying efficiency and control outbreak of diseases and insect pests in large area.