The invention relates to a method for preparing an
organic fertilizer for potatoes. The
organic fertilizer is prepared from the following raw materials in parts by weight: animal excreta, soybean straws, bean pulp, traditional Chinese medicinal materials, microelements,
urea, a
potash fertilizer,
plant ash and
humic acid; the traditional Chinese medicinal materials are
flos lonicerae, radix euphorbiae ebracteolatae, sun
euphorbia herb and radix glycyrrhizae. The preparation method comprises the following steps: fermenting the traditional Chinese medicinal materials and an
organic fertilizer respectively, pouring a traditional Chinese medicinal material
fermentation concentrate into the organic
fertilizer, uniformly stirring and mixing, and
drying at low temperature; detecting the content of nutrients, adding
urea, the
potash fertilizer and the microelements according to the content detection result, mixing, and then feeding the materials into a granule forming
machine for forming; adding the humid acid which is prepared according to a proportion to the granules, and
coating; feeding the coated granules to an air-flowing type medium temperature drier, and
drying to obtain the organic fertilizer for potatoes. The organic fertilizer for potatoes has the capabilities of improving the
soil structure, improving the
fertility of soil, increasing the yield and reducing the use amount year by year until no chemical fertilizer and
pesticide is used, thus finally realizing no-
tillage farming. Meanwhile, the organic fertilizer has the functions of suppressing survival and
reproduction of harmful microorganisms, lightening and gradually eliminating soil-borne
plant diseases and
insect pests and successive
cropping obstacle, enhancing the
water seepage,
water retention and gas
permeation capabilities and promoting soil
granulation, and is high in viable content and green without residues.