环青海湖地区草地蝗虫发生的生态环境条件分析

为了有效地进行草地蝗虫的防治,必须摸清其生长和繁殖与生态环境条件的关系。研究表明,在环青海湖地区气温对草地蝗虫影响较为明显是在蝗卵越冬期和孵化期。降水量太多不利于草地蝗虫的发育,但降水适量因有利于蝗蝻出土可能会增加蝗虫基数。青海湖级湖成阶地和构造台地有利于蝗虫的繁育。土壤的温度、质地及水分和盐分含量对草地蝗虫的发生和繁育也有一定影响。

Ecological Environment for Incidence of Grasshoppers in the Qinghai Lake Region

For effective control of grasshoppers, it is essential to clarify the relationship between the growing and reproduction of grasshoppers and the ecological environment they live in. The study shows that the air temperature in the Qinghai Lake Region is significantly related to the grasshoppers during the overwintering and hatching periods of their eggs,whereas heavy precipitation reversely to the growing of grasshoppers. However, an appropriate amount of precipitation may facilitates the emergence of nymphs, thus increasing the initial number of the adults. The secondary lacustrine terraces and tectonic platforms are found beneficial to the growing and reproduction of grasshoppers. In addition, the temperature, texture, moisture, and salt content of the soil have also a certain effect.