SOIL BACTERIA CONTAINING FERTILIZER AND METHOD FOR ITS PREPARATION

摘要

The present invention relates to immobilizing, culturing and granulating live microorganisms on solid carriers. More particularly the present invention relates to a method for the preparation of fertilizers comprising the steps of applying soil bacteria maintained in liquid culture medium onto a solid carrier; increasing the oxygen level in the environment of the carrier by gas injection; maintaining the support at a predetermined temperature to allow the proliferation of the soil bacteria; drying the fertilizer to a predetermined humidity by controlling the mixing and gas injection; and optionally granulating the product. The present invention also relates to the fertilizer obtained by this method and containing at least 109 cell/g soil bacteria. The soil bacteria are selected from the group consisting of Azospirillum brasilense ssp. SW51 (NCAIM IPI B 001293); Azotobacter vinelandii ssp. M657 (NCAIM IPI B 001292); Pseudomonas fluoresceins var. SW1 1 (NCAIM IPI B 001296); Bacillus polymyxa var. SW17 (NCAIM IPI B 001295); Bacillus megaterium var. M326 (NCAIM IPI B 001291 ), Micrococcus roseus sp. A21 (NCAIM IPI B 001294); Azospirillum lipoferum (AL); Bacillus circulans (B. cir.) and/or Streptomyces albus var. 0003 LP (NCAIM IPI B 001301 ).