“鸟”算不算“屏障”──面对虫灾的思考席根旺近几年来，我国许多平原农区虫灾严重．给农业生产造成了巨大损失。其中因素固然很多．但生态失衡却不能不说是一种最根本的原因。提起生态，不能不使人想起担负着维护生态平衡重任的防护林建设，因为它的成效如何，直接影响... “Bird” is not considered a “barrier” ─ ─ thinking in the face of pests and diseases Xi Genwang In recent years, many plains in our country pest serious pests. Caused huge losses to agricultural production. Of course, many factors. But the ecological imbalance can not but say that it is one of the most fundamental reasons. To lift the ecology, we can not but remind one of the construction of shelterbelt that is responsible for the maintenance of ecological balance because of its effectiveness and direct impact on ...