The types and functions of water-soluble fertilizers with large elements are as follows:
High nitrogen type: high nitrogen type macro-element water-soluble fertilizer has high nitrogen content, which can quickly meet the nitrogen demand of crops, and is especially suitable for the period when the nitrogen demand is large during the vegetative growth period of crops. Generally, it is used in the early stage of crop growth, which can accelerate the seedling lifting, strengthen the roots and promote the roots, accelerate photosynthesis, promote the synthesis of crop chlorophyll, and make the plant grow more robust.
High phosphorus type: high phosphorus type water-soluble fertilizer with large elements can promote crop root growth and nutrient transport, promote flower bud differentiation, preserve fruit and flower, and lay a solid foundation for crop yield and quality in the later stage of crop before and after the flowering period. In addition, some crops themselves have a greater demand for phosphorus, such as tomatoes and cucumbers in the early stage, which requires more phosphorus, and high-phosphorus water-soluble fertilizers can be used at this time.
High potassium type: high potassium type macro-element water-soluble fertilizer is a fertilizer with a relatively large amount in the late stage of crop growth, which can promote fruit development, sweeten and change color, improve quality and taste. The potassium content of high-potassium water-soluble fertilizer is relatively high, which is suitable for use in fruit trees and vegetables during the fruit expansion period, but it is necessary to pay attention to the time of application, if the high-potassium water-soluble fertilizer is applied too early, it may cause stiff fruit. Therefore, in the early stage of fruit expansion, it can be applied after a mixture of high potassium type and balanced type.
Balanced type: The biggest feature of balanced large element fertilizer is that the content of various elements is balanced, and it is regulated according to the actual growth demand. Such a balanced macro-element fertilizer has a very good effect on some uneven nutrients in some farmlands. After applying a balanced macro-element fertilizer, the nitrogen, phosphorus and potassium of the crop can be guaranteed, so that the growth of the crop will reach the balance of nutrients, so that there will be no growth phenomenon. This is more conducive to improving the yield and quality of crops.
In general, there are four types of macro-element water-soluble fertilizers: high nitrogen, high phosphorus, high potassium and balanced, each of which has its specific role and application.