Inh ibiting Effect of Assoc ia tive Nitrogen-f ixa tionBacter ia on Bacter ia W ilt D isea se of Euca lyptus

MA Hai-bin; KANG Li-hua; JIANG Ye-gen; ZHENG Cui-mei

The inhibiting effect of associative nitrogen-fixation bacteria on bacteria wilt disease of Euca lyptus was examined. The growth of Ra lstonia solanacearum was inhibited by both associative nitrogen-fixation bacteria (No. 1 andNo. 2) and culture filtrate of associative nitrogen-fixation bacteria (No. 1 and No. 2). Eucalyptus nursery experimentswere established in the greenhouse to determine the controlling effect of associative nitrogen-fixation bacteriaon bacteria wilt disease. The results showed that Eucalyptus seedlings inoculated with associative nitrogen-fixationbacteria and dual inoculated with associative nitrogen-fixation bacteria and Ralston ia solanacearum were higher thanthose without any inoculation. And the biomass above ground and underground of Eucalyptus seedlings inoculatedwith associative nitrogen-fixation bacteria were increased by 123. 23% and 101. 52% respectivelywhile the biomassabove ground and underground of Eucalyptus seedlings dual inoculated with associative nitrogen-fixation bacteria andRalstonia solanacearum were increased by 93. 22% and 71. 81% respectively.

1. Research Institute of Trop ical Forestry, CAF, Guangzhou　510520, Guangdong, China

Received Date: 2006-01-11

Abstract: The inhibiting effect of associative nitrogen-fixation bacteria on bacteria wilt disease of Euca lyptus was examined. The growth of Ra lstonia solanacearum was inhibited by both associative nitrogen-fixation bacteria (No. 1 andNo. 2) and culture filtrate of associative nitrogen-fixation bacteria (No. 1 and No. 2). Eucalyptus nursery experimentswere established in the greenhouse to determine the controlling effect of associative nitrogen-fixation bacteriaon bacteria wilt disease. The results showed that Eucalyptus seedlings inoculated with associative nitrogen-fixationbacteria and dual inoculated with associative nitrogen-fixation bacteria and Ralston ia solanacearum were higher thanthose without any inoculation. And the biomass above ground and underground of Eucalyptus seedlings inoculatedwith associative nitrogen-fixation bacteria were increased by 123. 23% and 101. 52% respectivelywhile the biomassabove ground and underground of Eucalyptus seedlings dual inoculated with associative nitrogen-fixation bacteria andRalstonia solanacearum were increased by 93. 22% and 71. 81% respectively.

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Inh ibiting Effect of Assoc ia tive Nitrogen-f ixa tionBacter ia on Bacter ia W ilt D isea se of Euca lyptus

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