作　　者： ; ; ; ; ; ;

机构地区： 华南农业大学工程学院

出　　处： 《广东农业科学》 2014年第22期155-158,165,共5页

摘　　要： 风送式喷雾可以有效地抵御自然风的干扰,减少雾滴的漂移,其喷雾有效性及雾滴的穿透性直接影响着喷雾机的喷雾性能。以宽喷幅风送式喷雾机为试验平台,用0.1%的罗丹明B为示踪剂,对靶标树进行了喷雾试验,研究宽喷幅风送式喷雾机雾滴沉积的有效性与穿透性。结果表明:喷雾雾滴在树冠前冠面及内膛均有较高的效率,在靶标树的前冠面、中膛、后冠面和距离树冠后方10 cm的外截面等4个截面上都有雾滴沉积,喷雾有效率分别为100%、86.2%、48.3%和62.1%;树冠前冠面、中膛、后冠面雾滴沉积量分别为0.028、0.007、0.003 m L,树冠前后地面上有明显的雾滴沉积,地面采样点上的沉积量分别为0.044、0.031 m L;喷雾过程中气流在靶标树两边存在绕流是引起树冠后方雾滴沉积的原因,关闭处于喷口下方的喷头可以减少雾滴在地面上的沉积。 Air-blast spraying can resist the natural wind disturbance effectively, reduce droplet drift. In order to research the spraying validity and droplets penetration, thes experiment was carried out via a wide-swath air-blast sprayer as the test platform, while 0.1% Rhodamine B as a tracer. Spraying validity test results showed that it had a better spraying validity in the front surface and intermediate section of the target tree canopy, and there was all droplet deposition in the front surface, intermediate section, back surface of the canopy and the section rearwards 10 cm away from the back of canopy. The spraying validity respectively was 100%, 86.2%, 48.3% and 62.1%. The droplets penetration test results showed that, in the front surface, intermediate section, back surface of the target tree canopy, the droplets deposition respectively was 0.028 m L, 0.007 m L, 0.003 m L. There were droplets deposition obviously on the ground near the target tree and the depositions at the sampling points were 0.044 m L and 0.031 m L. The reason lead to droplet depositions in the section rearwards 10 cm away from the back of canopy was air flow around the target tree canopy. It could reduce the deposition of droplets on the ground to shut off the nozzle located lower of the wide-swath air-blast sprayer outlet.

关 键 词： 宽喷幅风送式喷雾机 雾滴 沉积 穿透

领　　域： [农业科学]