The invention discloses a bacillus preparation, a bacillus compound preparation and application of the bacillus preparation and the bacillus compound preparation in increasing ferrophosphorus in soil, and belongs to the field of
plant nutrition and
microbiology. The preparation method comprises the following steps: centrifuging a bacterial solution of bacillus 1603IPR-02, and collecting supernate to obtain the
siderophore preparation. The
siderophore preparation is applied to
crop root systems, southern soil or compounded with
phosphate tailings to form a bacillus compound preparation to be applied to crops,
plant growth can be promoted,
plant biomass can be increased, meanwhile, the
siderophore preparation has the efficient Fe-P activation capacity, Fe-P insoluble in soil is converted into
phosphorus and iron capable of being utilized by plants, and the
utilization rate of the Fe-P is increased. The bio-availability of
soil nutrients is improved, and the absorption of crops on
phosphorus and iron in soil is promoted. When the bacillus preparation or the bacillus compound preparation is used for treating pakchoi, the
dry weight, the
phosphorus content and the
iron content of the pakchoi as well as the quick-acting phosphorus content and the effective
iron content of soil can be increased. When applied to crops, the preparation has the characteristics of no
pollution, no residue and biological
environmental protection.