The characteristics of biological fertilizer is the most essential and the most significant is that it is a live fertilizer.

Microbial fertilizer is a kind of biological fertilizer, which is made up of one or several kinds of beneficial microorganisms and is fermented by industrialization. Usually the microbial fertilizer is divided into two categories: one is contained by microbial life activities, increase the supply of plant nutrients, resulting in plant nutrition, and increase the yield, the representative varieties is manure; the other is the generalized microbial fertilizer, although also through the role of microbial life activities with the yield of crops, but it is not limited to improve plant nutrient supply level, also includes the secondary metabolites they produce, such as hormones on plant stimulation.

To promote the absorption and utilization of nutrients by plants, or to resist the pathogenic role of some pathogenic microorganisms, to reduce plant diseases and insect pests, so as to improve the yield and quality of crops