密闭棚室风速对药雾浓度随时间变化影响的研究

Research on Pesticide Concentration Changed with Time in Different Wind Speed in Airtight Awning Space

[目的]为密闭棚室内的施药作业提供指导。[方法]运用改进的大气采样器,在不同的轴流风速下对常温烟雾机喷头前方10m位置处的空气中药雾浓度按时间序列进行采样,以研究不同的风速对药雾浓度随时间变化的影响。[结果]研究结果表明,在喷雾阶段,药雾浓度受轴流风速的影响不明显;在喷雾结束后阶段,棚室内药雾浓度在同一采样时刻风速越大,药雾浓度越大,风速越小,药雾沉降越快。[结论]该试验为研究密闭棚室内药雾的漂移分布状况奠定了基础。

[Objective]The study was to provide the guidance for pesticide application in airtight awning space.[method] In order to research the pesticide concentration changed with time in different wind speed in the airtight awning space,an improved container which collects the air samples was used in the 10m front of the nozzles.[Result]With this method,it was showed that it had no obvious effect on the pesticide concentration changed with time at the spraying time;But after the spraying time,the pesticide concentration was larger in the higher speed wind in the same time.[Conclusion]The study laid a fundation for studying drift and distribution of presticide fog in airtight awning space.