The application provides application of a broadleaf paloontia endophytic
flavobacterium in promoting
plant growth, the
flavobacterium strain P1R7GS3 in the application is separated from the roots of healthy broadleaf paloontia and is preserved in the Guangdong Microbial Digital Culture Collection Center with a preservation number of GDMCC No: 66990; has the effects of
ammonia production,
indole acetic acid production and
zinc dissolution and has a
biological membrane formation capacity, which has an excellent promoting effect on the growth of plants, in particular, the growth of broadleaf paloontia. The application can significantly promote the growth of stem thickness,
leaf number,
fresh weight, leaf
fresh weight,
dry weight and leaf
dry weight of broadleaf paloontia plants; meanwhile, the application promotes the synthesis of effective substances such as broadleaf paloontia
alcohol and broadleaf paloontia
ketone while improving the
biomass of broadleaf paloontia; and can be used as a biological
fertilizer for promoting the growth of field crops and effectively reducing the use of chemical fertilizers.