Water soluble fertilizer refers to the compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acids, humic acid and alginic acid that can be completely dissolved in water. It can be divided into solid water-soluble fertilizer and liquid water-soluble fertilizer. In terms of nutrient content, there are large element water-soluble fertilizer, medium element water-soluble fertilizer, trace element water-soluble fertilizer, amino acid water-soluble fertilizer, humic acid water-soluble fertilizer, organic water-soluble fertilizer, etc.
Compared with traditional calcium superphosphate and granulated compound fertilizer, water-soluble fertilizer has obvious advantages. It is a quick acting fertilizer with good water solubility and no residue. It can be completely dissolved in water and can be directly absorbed and utilized by crop roots and leaves. The integration of water and fertilizer is realized by applying water and fertilizer together and carrying fertilizer with water. Its effective absorption rate is more than twice that of ordinary chemical fertilizer, up to 80% - 90%; Moreover, the fertilizer effect is fast, which can solve the nutritional needs of high-yield crops in the rapid growth period. The water demand of drip irrigation system is only 30% of that of ordinary chemical fertilizer, and the fertilization operation can hardly use manpower, which greatly saves the labor cost. More and more soil and fertilizer experts, agricultural technology extension experts, agricultural materials dealers and farmers have realized the importance of water-soluble fertilizer.
A large amount of water-soluble fertilizer can make the stems and leaves of crops straight and enhance the photosynthetic effect of leaves; After crops absorb elements, the surface cell wall of stems and leaves thickens and the cuticle increases. Especially in the resistance to rice blast, leaf spot, stem rot, bacterial fence and rust of cotton bollworm, it can effectively regulate the opening and closing of leaf stomata and control the effect of water transpiration.
Medium element water-soluble fertilizer is an environment-friendly green fertilizer with safety and environmental protection, no hormone and no residue. After being applied to the soil, it can make the roots of crops developed, the straw strong and the leaf color dark green, and improve the utilization rate of nitrogen, phosphorus and potassium in the soil; It can provide sufficient calcium and magnesium for soil, improve soil physical and chemical properties and protect soil; When used in combination with a large number of element fertilizers, it can make up for the physiological diseases caused by the lack of elements and make the crops absorb more comprehensive nutrition.