Efficiency Of Soil Solarization On The Control Of Clubroot And The Impact On The Soil Microbial Communities

Clubroot disease is one of the soil borne disease in the world,In recent years,the incidence of clubroot area had led to a serious decline in out put,This study showed a environmentally friendly and effective method,soil solarization to contral the clubroot disease.we researched how this method control the disease throw test soil physical and chemical properties,enzyme activity,number of rhizome spores,soil microbial community,and plant yield,morbidity and morbidity changes.To provide the theoretical basis for this method to application in agricultural production.The results are as follows:1.Effect of soil solarization on soil physical and chemical properties and prevention and treatment of the clubroot disease.Soil solarization have a significant effect on the clubroot disease,and increased plant yield.In 0-1 Oem of soil,soil pH increased from 4.96 to 5.6,S-SC decreased from 62.7 U to 44.3 U,S-UE increased from 2.08 U to 5.212 U,S-DEA increased from 0.205 U to 0.342 U,plant incidence rate decreased from 87.66%to 49.12,plant Incidence level decreased from 45.24%to 16.96,P.brassica resting spores decreased from 10.21×105/g(dry soil)to 6.33 × 105/g(dry soil),the plant yield increased from 2.808 g to 3.954 g,But soil solarization have no significant effect on soil EC.2.Effects of soil solarization on soil microbial community.In soil 0-10cm and 10-20cm soil solarization increased bacterial Fungal microbial community Shannon-Wiener increased from 1.61,1.19 to 1.98,1.53,fungal microbial community Shannon-Wiener increased from 1.38,1.29 to 1.89,1.41,AOA microbial community increased from 1.59 to 1.82 to 1.91 and 2.43.The results of variance analysis showed that soil solarization increased soil bacteria,fungi and AOB microbial diversity There is no obvious effect on AOB microbial diversity.In t soil 0-10 cm,soil solarization reduced the number of Uncultured Acidobacteria bacterium,SchizopHyllum commune,Uncultured ammonia-oxidizing archaeon,Crenarchaeote enrichment,and increased the culture of Uncultured bacterium,reduced the number of beta proteobacterium,In soil 10-20 cm soil solarization reduce the number of Thermoflavifilum aggregans,Uncultured ammonia-oxidizing,Uncultured archaeon and Crenarchaeote enrichment culture,which increased Uncultured soil bacterium Amanita westii voucher,Coniochaetales sp.,Histiostomatidae gen.Sp..Based on the above research results,it is concluded that the mechanism of soil solarization to prevent root rot is as follows:the correlation between soil physicochemical properties,microbial diversity,plant yield and incidence and incidence of root rot disease There was a significant negative correlation between the incidence and incidence of temperature,pH,bacterial microbial diversity and plant yield,but there was a positive correlation with the number of dormant spores of Rhizocephalae.The solar heat treatment mainly improved the temperature,pH,The diversity of soil bacterial microbes,plant yield,reduced the concentration of Rhizome of Rhizoctonia,inhibited the incidence and incidence of Rhizoctonia.