雾滴在树冠中的沉积和穿透研究

Study on Droplet Deposition and Penetrability in Tree Crown by the Wind Tunnel

采用风洞实验方法研究农药雾滴在树冠中的沉积量和穿透性。通过风洞测量实验及分析表明:随着风速的降低,雾滴的穿透距离缩短;喷雾沉积量随树冠深度距离的增加而减少;随着树叶迎风角度从0°到90°的逐渐增加,在树冠的外层沉积量增加,相反在树冠的内层沉积量减少。从而定量地描述了在实验条件下农药雾滴的穿透性和飘移量。

It was first to study the droplet deposition and penetrability in tree crown by the wind tunnel.The test results showed:(1)The lower the wind speed,the shorter the penetrating distance of the droplet.The longer the distance in the tree crown,the lighter the weight of the droplet deposition.(2)As the angle of leaf against the wind was increasing from 0° to 90°,the droplet deposition in the outside layers of testing tree crown was also increasing,but the reverse was that it was decreasing in the inside layers of tree crown.The study was quantitatively described the droplet penetrability and drift under the definite natural circumstances.It supplies a scientific basis for accurately using pesticides,enhancing the result of the prevention and control,and decreasing the environmental pollution.