Corn special controlled-release composite fertilizer

Abstract

The invention discloses a corn special controlled-release composite fertilizer which comprises the following ingredients in parts by weight of: 120 to 180 parts of potassium chloride, 150 to 180 parts of diammonium phosphate, 100 to 550 parts of large-granule urea, 50 to 120 parts of ammonium sulfate, 110 to 360 parts of granular superphosphate and 8 to 80 parts of composite control agent, wherein the composite control agent contains urease inhibitor, nitrification inhibitor, ammonium sulfate and clay. The corn special controlled-release composite fertilizer releases nutrients aiming at nutritional demand characteristics at various stages of corn growth, is synchronous in fertilizer nutrient supply amount, strength and time as well as corn growth demands, and has low production material cost.

Description

technical field [0001] The invention relates to the field of chemical fertilizers, in particular to a controlled-release compound fertilizer. Background technique [0002] Controlled-release compound fertilizer is a kind of chemical fertilizer that can control the nutrient release rate of chemical fertilizer in the soil by adding urease inhibitors, nitrification inhibitors or coating technology to ordinary chemical fertilizers. Its advantage is that the utilization rate of chemical fertilizers is high. Compared with chemical fertilizers, the effect of increasing production is obvious, and the application amount of chemical fertilizers is small. However, due to its high production cost, its sales price is high. At present, it is only used for ornamental plants such as flower seedlings, which limits the promotion of controlled-release compound fertilizers in field crop production. In the prior art, there is no special controlled-release compound fertilizer for the release of n...

AI Technical Summary

Problems solved by technology

[0002] Controlled-release compound fertilizer is a kind of chemical fertilizer that can control the nutrient release rate of chemical fertilizer in the soil by adding urease inhibitors, nitrification inhibitors or coating technology to ordinary chemical fertilizers. Its advantage is that the utilization rate of chemical fertilizers is high. Compared with chemical fertilizers, the effect of increasing production is obvious, and the application amount of chemical fertilizers is small. However, due to its high production cost, its sales price is high. At present, it is only used for ornamental plants such as flower seedlings, which limits the promotion of controlled-release compound fertilizers in field crop production. In the prior art, there is no special controlled-release compound fertilizer for the release of nutrients for common field crops, especially for the characteristics of nutrient requirements during the growth period of corn.

Images