Physical，Chemical and Biological Characteristics Analysis of Rhizosphere Soils between Infected Plants of Tomato Bacterial Wilt and Non-infected Plants
YANG Shang-dong1，2，WU Jun1，ZHAO Jiu-cheng1，GUO Yi-juan1，LONG Ming-hua1*
1Agricultural College，Guangxi University，Nanning 530004，Guangxi，China；2Guangxi Crop Genetic Improvement and Biotechnology Lab，Guangxi Academy of Agricultural Sciences，Nanning 530007，Guangxi，China
Abstract：A comparative study was conducted to analyze the physical，chemical and biological characteristics of rhizosphere soils between infected plants of tomato（Lycopersicon esculentum Mill.）bacterial wilt and non-infected plants．The results showed that the soil pH and organic matter（OM），total nitrogen，phosphorus and potassium contents，and alkaline nitrogen，rapid available phosphorus and potassium contents，etc．abiotic factors in rhizosphere soils of infected plants showed a downward trend，especially the dropping tendency in contents of alkaline nitrogen，rapid available phosphorus and potassium were significantly．In addition，the numbers of culturable bacteria and actinnomycetes were significantly decreased in rhizosphere soil of bacterial wilt infected plants，while the numbers of culturable fungi were very significantly increased．Meanwhile， the activities of β-Glucosidase，Phosphatase and Protease，biomass C and N were all significantly dec reased．
