低层大气垂直运动对粘虫起飞、降落的影响

EFFECT OF VERTICAL MOTION IN LOWER ATMOSPHERE LAYER ON ASCENDING AND DESCENDING MOVEMENT OF ARMY WORN

本文根据昆虫生态学及运动学原理,初步探讨了粘虫迁飞的运动方程,进一步说明空气的垂直运动和粘虫起飞、降落的关系。因此我们运用大气运动的连续方程,对我国粘虫发生区低层大气的垂直运动,进行了大量的计算,再次证明上升气流对起飞有利,下沉气流对起飞不利,它的起飞不仅是由于内在的某种生物学原因主动升空。

The equation of Leucania's migratory flight was studied primarily according to the principle of insect-ecology and kinematics. Thus the relationship between the vertical motion of atmosphere and the ascending and the descending movement of Leucania has been explained further in the article. A good deal of calculations for vertical motion in lower atmosphere layer in the appearance area of Leucania separata Walker have been done with the equation of coutinuity. The results showed once again that the upward current is beneficial to the ascending movement of Leucania While the downdraft is unfavorable. Leucania's flying up to the sky is not only due to certain internal cause of biology, and with the aid of the upward current can the Leucania fly upwardly to a certain hight. This shows that the factor of ascending movement Leucania is a conection of activeness and passiveness. However, the activeness is much clearer in the process of descending movement.