近些年来,由于保护地蔬菜的快速发展和集约化栽培,为土传病害的发生发展提供了适宜的环境,特别是随着连作时间的延长,使保护地蔬菜栽培的土传病害上升为主要病害,对蔬菜生产造成极大损失。病菌猖獗侵染的原因与土壤中病原菌积累、气候条件的变化和品种变更有密切关系,现将几种? In recent years, due to the rapid development and intensive cultivation of vegetables in protected areas, it has provided an appropriate environment for the occurrence and development of soil-borne diseases. In particular, as the continuous cropping time prolongs, the soil-borne diseases of vegetable cultivation in protected areas have risen to the major Diseases, causing great losses on vegetable production. Pathogen infection rampant pathogens and accumulation of soil bacteria, climate conditions and species changes are closely related to the current number?