Provided is a preparation method of a watermelon
organic fertilizer. The
fertilizer is prepared from, by weight, animal
manure, wheat
straw, bean pulp, traditional Chinese medicines, trace elements,
urea, a
phosphate fertilizer, a
potash fertilizer and
humic acid, wherein the traditional Chinese medicines comprise
honeysuckle flowers, folium isatidis, Japanese
thistle herb, sun
euphorbia herb and
licorice roots; the preparation method comprises the steps that the traditional Chinese medicines and the
organic fertilizer are subjected to
fermentation, a
traditional Chinese medicine fermented concentrated solution is poured into the
organic fertilizer, stirring and mixing are conducted to be uniform, and low-temperature
drying is conducted; the
nutrient content is detected, according to the content detection result, the
urea, the
phosphate fertilizer, the
potash fertilizer and the trace elements are added for mixing, and the mixture is sent into a granule shaping
machine for shaping;
humic acid is blended according to the proportion and then added into the granules for
coating; the coated granules are sent into an air flow medium-temperature dryer for
drying, and the watermelon organic fertilizer is obtained. According to the preparation method of the watermelon organic fertilizer, a
soil structure can be improved, the
soil fertility is increased, the watermelon yield is increased, and the watermelon quality is improved. Meanwhile, harmful microorganisms are inhibited to survive and reproduce, soil-borne diseases and
insect pests and
continuous cropping obstacles are relieved and gradually eliminated,
water seepage,
water retention and air permeable capacities are enhanced, soil
granulation is promoted, the viable content is high, and the fertilizer is green and free of residue.