The application belongs to the technical field of microorganisms and particularly relates to a strain of DB3 with
disease-resistant iron-dissolving and growth-promoting functions Stenotrophomonas sepilia The strain DB3 is isolated from the
rhizosphere of
pear trees in
calcareous soil, has good abilities of IAA production, rapid growth,
dissolution of insoluble iron, iron carrier production and
antagonism to various
pathogenic bacteria. Through
potting tests, it is shown that the DB3
bacterial agent can significantly promote the growth of peanut and
pear seedlings, improve the root development and iron
nutrient content, enhance the SPAD value and
iron absorption of leaves, and relieve the iron deficiency
chlorosis, and can be used for preparing a biological bacterial
fertilizer, reducing the input of chemical iron
fertilizer, and has a good development and application prospect.