Water-soluble fertilizer is a new type of fertilizer in China's chemical fertilizer industry in recent years. As a quick-acting fertilizer, water-soluble fertilizer has good water solubility and no residue, can be completely dissolved in water, and can be directly absorbed and used by the roots and leaves of crops. Adopt water and fertilizer co-administration, and use water to bring fertilizer to realize the integration of water and fertilizer. Its effective absorption rate is more than double that of ordinary chemical fertilizer, reaching 80% -90%.