The invention discloses a functional liquid bioorganic
fertilizer and a preparation method thereof. The preparation method comprises the following steps of: fermenting
livestock manures to form the mixture of
biogas slurry and
biogas residues, separating the
biogas residues to obtain
clear liquid, decomposing the
clear liquid, adding
photosynthetic bacteria into the
clear liquid for intermediate culture, and mixing the cultured clear liquid,
chitosan, a synergist, and trace elements required by plants in proportion to prepare the functional liquid bioorganic
fertilizer. The functional liquid bioorganic
fertilizer has a plurality of functions of promoting the transformation of soil substances, improving
soil structure, improving the
fertility of soil, promoting the growth of crops, fixing
nitrogen, improving the
nitrogen level of the soil, promoting the multiplication of beneficial microorganisms of the soil, participating jointly in the circulation of substances of soil
ecosystem, improving the
cold resistance,
drought resistance and
disease resistance of the crops, and the like, has the characteristics of small using amount, quick response and high effect persistence so as to reduce the using amounts of chemical fertilizers and pesticides, reduce
agricultural pollution and save agricultural cost, can be mainly used for foliage dressing and as a base fertilizer as well as a root fertilizer, plays a very important role in recycling finite resources and protecting the agroecological environment, is particularly applied to the production of organic green
pollution-free agricultural products so as to improve the quality and yield of the organic agricultural products, and is of great significance for the realization of ecocycle economy in China.