What kind of fertilizer is controlled release fertilizer?What are the characteristics?
In the development of modern agriculture that pursues high efficiency and environmental protection, controlled-release fertilizers, with their unique advantages, are gradually becoming the new favorite of the fertilizer market.This kind of fertilizer not only improves the utilization rate of fertilizer, reduces environmental pollution, but also promotes the healthy growth of crops and infuses new vitality into the sustainable development of agriculture.
Controlled-release fertilizer, known as controlled-release fertilizer, is an advanced form of slow-release fertilizer.It controls the release rate of nutrients in fertilizers through encapsulation technology, wrapping, adding inhibitors, etc., so that the nutrient release coincides with the fertilizer demand rate of the crop growth cycle, so as to achieve long-term and high-efficiency purposes.Controlled-release fertilizer is the main direction of the development of modern fertilizers, which is particularly suitable for mechanized production, especially to meet the needs of simultaneous fertilizer planting.
The micropores on the membrane of controlled-release fertilizers are usually only a few hundred nanometers, and liquid water cannot pass directly, so it can only enter the membrane in the form of water molecules.Therefore, except for water molecules that can freely enter and exit the membrane, fertilizer particles are completely isolated from the outside.The speed of nutrient release is only related to the speed of movement of water molecules and the pores of membrane micropores, and the speed of movement of water molecules depends on the temperature.This makes the nutrient release curve of controlled-release fertilizer consistent with the plant demand curve, realizing on-demand supply.
Compared with traditional fertilizers, controlled-release fertilizers have significant advantages.First of all, its fertilizer efficiency and utilization rate are high.Conventional fertilizers have serious nutrient loss, and less than 30% of them are really used by crops. Controlled-release fertilizers control nutrient release through encapsulation, avoiding nutrient loss, so that the fertilizer efficiency utilization rate reaches more than 70%, and the use of near roots can even reach more than 80%.Secondly, the effect of controlled-release fertilizer on increasing production is obvious.By controlling the release of nutrients, the supply of crop nutrients is stable and regular, crop defrosting and leggings are avoided, and a significant increase in production is achieved.
In addition, controlled-release fertilizer also has multiple advantages such as time-saving and labor-saving, sterilization and insect repellent, soil improvement, and crop sulfur supplementation.The use of controlled-release fertilizer can greatly reduce the number of fertilizations and save manpower and material resources.At the same time, the coating material of the controlled-release fertilizer adopts polysulfide compounds, which have the effect of sterilization and insect repellent, and reduce the use of pesticides.The empty shell after the nutrient is released can also store water and retain moisture, play the function of ventilation and fertilizer preservation, improve the soil structure, and make the long-term compacted soil loose.Then, after the empty shell released by the controlled-release fertilizer is broken, it can directly participate in the nutrient release and be absorbed by the crop, providing the necessary sulfur for the crop.
