From the specific analysis of water soluble fertilizer production and application, this type of fertilizer has the following characteristics:
The production cost of compound water soluble fertilizer is generally higher than that of conventional nutrient fertilizers. It is required that all raw materials are completely water-soluble, so the materials are more expensive. Although the production of liquid water soluble fertilizer is less than conventional compound fertilizer, its storage, transportation and application require specialized equipment and the cost is also high. For example, in order to prevent crystallization and precipitation during solution cooling in the low temperature season, advanced and costly equipment is required for liquid fertilizer storage and transportation. Therefore, the price of water-soluble fertilizer is generally higher than that of large-scale fertilizer products.
In the application of farmland, the application of such fertilizers is not the same as that of large fertilizers. Generally, it is combined with irrigation, and the fertilizer and irrigation water are integrated into the root soil or crop leaves through different irrigation methods. According to different irrigation methods, fertilization can be divided into flushing, spraying and fertilizing. The application of the solid water soluble fertilizer is first dissolved and formulated into a mixed solution, followed by application or spraying. The liquid water soluble fertilizer needs to be equipped with pipelines, storage tanks, fertilizer applicators and other ancillary equipment. The fertilizer is easily dissolved into the irrigation water, which can be sprayed and dripped, or directly diluted with water to be sprayed with foliar fertilizer.
Advantages of water-soluble fertilizer: First, the use of water, fertilizer, and water, to achieve water and fertilizer integration, high fertilization efficiency, and can reduce the total amount of fertilizer, play a synergistic effect of fertilizer and water, so that the efficiency of fertilizer and water use Significantly improved. Second, the fertilizer efficiency is fast, which can solve the nutritional needs of high-yield crops in the rapid growth period.
Disadvantages of water-soluble fertilizer: First, the price of water-soluble fertilizer is generally high, which is not conducive to popularization. Second, it is fast-acting and difficult to store in the soil for a long time. The amount of fertilizer should be strictly controlled. If the single use is slightly more, it will cause the loss of fertilizer, which will reduce the economic benefits of fertilization, fail to achieve the goal of high yield, high quality and high efficiency, and will also cause pollution of the water environment, which is not conducive to sustainable development.
In short, from the perspective of the degree of industrial development in China, the research and development of related products are still not enough. For example, liquid fertilizers that are applied with irrigation water have not been developed and produced in large quantities. In terms of application, the key to the application of water-soluble fertilizers is to grasp the principle of timely and appropriate combination of water and fertilizer. At present, the fertilization techniques under different cultivation systems and the nutrient demand rules during the growth of major crops, the appropriate fertilization period, the amount of fertilization, etc. Less. From the perspective of marketing status, some enterprises blindly expand or make one-sided publicity of the performance and scope of water-soluble fertilizer products for promotion, which will be misleading for consumers. For example, in the instructions for the use of fully water-soluble potassium sulphate, the amount of fertilizer applied per acre is increased to 15 kg, which is obviously excessive and inappropriate. In another example, in the instructions for the use of imported potassium nitrate, all crops are incorrectly labeled, which would mislead farmers into losses due to the expansion of the target crop. These phenomena are not conducive to the promotion and application of water-soluble fertilizers and healthy development.
