Effects of Plant Growth Promoting Rhizobacteria Serratia plymuthica A21-4 on Cucumber Growth and Soil Rhizosphere Microecology
In order to investigate the effect of Serratia plymuthica A21-4 on cucumber growth and rhizosphere soil microecology,A21-4 suspension was applied to rhizosphere soil of cucumber.The results showed that the treatment of A21-4 could remarkably promote the cucumber growth and development both at seedling and field stages,improve root system activity,increase cucumber yield and quality.Compared with the control, treatment of A21-4 had increased cucumber yield by 32.22%,and the contents of protein,soluble sugar,and VC were significantly increased.At the same time,A21-4 treatment could remarkably adjust cucumber rhizosphere soil,and significantly increase activities of urease,phosphatase,sucrase and catalase in cucumber rhizosphere soil.Besides,A21-4 treatment could increase the amount of bacteria and antinomycetes in cucumber rhizosphere soil,and the available contents of N,P and K there.
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