在控制鼠疫的众多措施中，起积极作用的是人类不断开展的农业、水利、林业、城建等多种社会活动。这些活动使过去适合主要宿主生存的原始生境发生了根本性改变，主要宿主不能生存，导致数量逐年减少。１生态环境改变在控制鼠疫中的作用农田水利建设在消除鼠疫自然疫源性中... Among the many measures that have been taken to control the plague, many kinds of social activities such as agriculture, water conservancy, forestry and urban construction, which have been taking an active part, have played an active part. These activities have fundamentally changed the original habitats that were suitable for the survival of the main host in the past, and the main host can not survive, resulting in a decrease in the number of each year. 1 changes in ecological environment in the control of plague in the role of farmland water conservancy construction in the elimination of plague natural foci ...