The invention relates to a
nitrogen-
phosphorus-
potassium compound
fertilizer, which consists of the following raw materials in part by weight: 8-12% of
nitrogen, 16-20% of phosphorous, 25-40% of
potassium, 13-17% of medium elements and 1-3% of trace elements. By using the
nitrogen-
phosphorus-
potassium compound
fertilizer, not only can the requirements of a farm
crop on lots of the nitrogen, the
phosphorus and the potassium be met; a
plant is impelled to grow, so that a
plant body is tall and big, branches are thick and strong, stem leaves are luxuriant, blades are fat and big, and grains are full; but also a
root system can be effectively promoted to be developed; the farm
crop is accelerated to grow and develop; the performances of
drought resistance,
cold resistance, lodging resistance and resistance to diseases and
insect pests are improved; fruits are mature ahead of time; furthermore, the trace elements such as ferrum,
boron,
arsenic,
manganese,
copper,
cobalt,
molybdenum and the like, which are needed for the growth of the
plant, are replenished for soil; the synthesis and the stability of
chlorophyll are promoted; an in-vivo
redox reaction is participated; the biological
nitrogen fixation and the development of a generative organ are promoted; and the yield of the farm
crop can be further improved.