To explore the effects of Bacillus subtilis and Trichoderma harzianum on the root architecture and growth of cucumber seedlings,"Xinjin No.4"was used as the test material and pot experiment car-ried out,with a total of 6 treatments being set up:LB medium(rooting,LB),B.subtilis(rooting,B),PD medium(rooting,PD),T.harzianum(rooting,H),mixed medium(V(LB medium)∶V(PD medium)=1:1 rooting,LBPD),and mixed bacterial(V(B.subtilis)∶V(T.harzianum)=1∶1 rooting,HB).The effects of growth,root morphology,topological structure and typing parameters on the root growth and develop-ment of cucumber were studied,with the results that,compared with the control group,the total root length,root surface area,root volume,cross number,plant height,stem diameter and biomass of cucumber seedlings treated with bacterial solution were significantly increased HB＞H＞B＞PD＞LBPD＞LB.In conclusion,a single applica-tion of B.subtilis or T.harzianum liquid could significantly promote the growth of cucumber seedlings,but the effect of mixed bacterial solution would be better than that of a single bacterial solution.
cucumber seedlingBacillus subtilisTrichoderma harzianumroot system configurationtopological index
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