近百年来，人们已经意识到可以用微生物来防病和促进植物生长。本世纪50年代．我国就已经分离出放线菌5406，并将其应用于增产和防病。Kloeper和Schroth（1978民1990）分离出的植物促生长菌具有明显的增产和防病作用。这类菌的发现为我们提供了一条防病和增产的新途径，国内外 For nearly a century, people have realized that microorganisms can be used to prevent diseases and promote plant growth. This century 50’s. China has isolated actinomycetes 5406, and its application to increase production and disease prevention. Plant growth-promoting bacteria isolated by Kloeper and Schroth (1978, 1990) have significant yield and disease control effects. The discovery of these bacteria provides us with a new way to prevent disease and increase production at home and abroad