In modern agriculture, the pursuit of high efficiency, environmental protection and high yield has promoted the continuous upgrading of fertilization technology. Among numerous fertilizers, water-soluble fertilizers with major elements (WSF) have become a core choice for large-scale planting bases and professional growers due to their unique advantages, gradually replacing traditional granular compound fertilizers in many application scenarios.

Water-soluble fertilizers with major elements refer to liquid or solid composite fertilizers that can be completely dissolved in water, mainly composed of the three major nutrient elements necessary for crop growth: nitrogen (N), phosphorus (P) and potassium (K), and properly added with moderate or trace elements according to crop needs. Different from traditional compound fertilizers that rely on slow decomposition in soil to release nutrients, WSF can be quickly dissolved in water and directly delivered to the root zone of crops through drip irrigation, sprinkler irrigation and other water-saving irrigation systems, realizing the integration of water and fertilizer and achieving precise nutrient supply.

The core advantages of WSF are reflected in four aspects. Firstly, high utilization rate. Affected by soil adsorption, volatilization and loss, the actual absorption rate of traditional compound fertilizers is only 30%-40%, while WSF can reach 80%-90% because nutrients are directly absorbed by crop roots with water, which means 1kg of WSF is equivalent to the effect of 2kg of traditional fertilizers, greatly reducing fertilizer waste. Secondly, precise nutrition supply. WSF can flexibly adjust the formula according to the nutrient needs of different crop growth stages, such as high-nitrogen formula for seedling stage to promote root growth, high-potassium formula for fruit expansion stage to improve fruit quality, and balanced formula for growth period to ensure comprehensive nutrition, realizing "targeted fertilization".

Thirdly, labor and water saving. Combined with drip irrigation and sprinkler irrigation systems, WSF can realize "fertilization while watering", saving more than 50% of labor costs compared with traditional manual broadcasting. At the same time, it can save 40% or more water, which is particularly suitable for water-scarce areas and facility agriculture. Fourthly, environmental protection and sustainability. The rational use of WSF can reduce fertilizer residues and the risk of groundwater pollution, and help promote ecological agriculture. Data from the Food and Agriculture Organization of the United Nations (FAO) shows that water-fertilizer integration technology using WSF can reduce nitrogen fertilizer usage by 30%-50% and effectively alleviate soil compaction caused by excessive fertilization.

As a "nutritional housekeeper" for modern crops, WSF not only meets the needs of high-yield and high-quality crop production, but also conforms to the development concept of green agriculture, and its application scope will be further expanded in the future.