采自 5个县 (市 )的 2 6个土壤样品中 ,所有土壤对青枯菌均有抑制作用 ,青枯菌在土壤中 3d的恢复出现率在 2 0 %以下 ,其中 4 2 %的土样对青枯病有抑制作用 ,抑病土与土壤 p H值、前作是否种植番茄的关系不大 ,但和土壤质地关系大 ,沙壤土不利于青枯病的发生 ,而沙质土及粘质土利于青枯病的发生。尿素释放的氨气对青枯菌有很强的杀伤能力 Among 26 soil samples collected from 5 counties (cities), all the soils had inhibitory effects on R. solanacearum. The recovery rate of R. solanacearum in soil was below 20%, of which 42% Like the inhibition of bacterial wilt, inhibition of soil pH and soil p H value, before the planting tomato is not a big relationship, but the relationship with the soil texture, sandy loam is not conducive to the occurrence of bacterial wilt, sandy soil and mucilage Tuli in the occurrence of bacterial wilt. Ammonia release of urea on R. solanacearum has a strong ability to kill