Urea phosphate ——High concentration nitrogen phosphorus compound fertilizer
Urea phosphate is a new and efficient nitrogen phosphorus compound fertilizer, which has a significant effect on increasing crop yield and improving soil.
Effect of urea phosphate as fertilizer on Soil：
1.Urea phosphate can control soil pH
In acid red soil and alkaline silty loam, the pH of soil micro zone will increase in the process of hydrolysis and conversion of conventional urea to NH4 + under the action of urease. In acidic soil, the increase of pH is conducive to reduce the aluminum toxicity of soil to plants. The pH of urea phosphate 1% aqueous solution is 1.89. At the same time, urea phosphate is also an unstable complex of urea and phosphoric acid, and releases a small amount of CO2 and NH3. Therefore, when urea phosphate is applied to the soil as a fertilizer and saline alkali soil modifier, it will be able to reduce the pH value of the soil or soil micro area and change the soil acid-base balance, so as to improve the physical and chemical properties of the soil, improve the soil structure and promote the growth of crops.
2.Urea phosphate application can reduce ammonia volatilization in soil
Ammonia volatilization is the main way of soil nitrogen loss. In some soils conducive to ammonia volatilization, the amount of nitrogen lost by ammonia volatilization can account for 40% – 50% of the total soil nitrogen application. Therefore, reducing ammonia volatilization is one of the important ways to provide nitrogen use efficiency. Controlling soil ammonium nitrogen content and soil pH value is the key technology to reduce soil ammonia volatilization and improve nitrogen use efficiency. Urea phosphate has potential advantages in reducing ammonia volatilization of nitrogen fertilizer in soil. As an acid fertilizer, urea phosphate can effectively reduce the pH value of soil, so as to effectively reduce the ammonia volatilization of soil and improve the utilization rate of fertilizer; In addition, urea phosphate can also reduce the hydrolysis rate of urea, reduce the content of ammonium nitrogen in soil, and effectively reduce the rate of ammonia volatilization in soil.
3.Urea phosphate is beneficial to activate calcium and magnesium in soil and increase the effect of medium and trace fertilizers
Calcium, magnesium, manganese and zinc are essential nutrient elements for plant growth and development, and their role in plant growth, development and metabolism is irreplaceable. Ordinary phosphate fertilizer enters the soil and reacts with medium nutrient elements such as calcium and magnesium and nutrient elements such as zinc and manganese to form insoluble sediments. This reduces the activity of calcium, magnesium, zinc and manganese in soil and the utilization rate of phosphorus fertilizer in the current season. The use of urea phosphate as acid complex nitrogen phosphorus compound fertilizer can not only increase the hydrogen ion in the soil and reduce the pH value of the soil, so as to increase the dissolution of hydroxide precipitation of elements such as calcium, magnesium, zinc and manganese and increase its effectiveness.
Effect analysis of urea phosphate in other aspects of Agriculture
Benefit analysis of urea phosphate on agricultural production
1.Increasing production and income is the main purpose of applying fertilizer, especially chemical fertilizer. Compared with other conventional nitrogen and phosphorus fertilizers and their compound fertilizers, urea phosphate can increase the economic benefits of fertilization to a greater extent.
2. Effects of urea phosphate on microorganisms in soil treated with farm manure
The application of farm manure and other organic substances into the soil will effectively improve the physical and chemical properties of the soil and improve the nutrient level of the soil. Urea phosphate can be used as a disinfectant for fertilizing soil because it can improve the sanitary conditions of fertilizing soil and the community structure and biological activity of ammonifying bacteria, nitrifying bacteria, decomposing bacteria and nitrogen fixing bacteria in soil.
3. Effect of urea phosphate on drip irrigation facilities
Urea phosphate is acidic in aqueous solution, which increases the solubility of calcium and magnesium ions. At the same time, urea phosphate also acts with calcium and magnesium ions in aqueous solution to form soluble calcium urea phosphate and magnesium urea phosphate, which can reduce or prevent the precipitation of calcium and magnesium, so as to reduce the scaling and plugging phenomenon of drip irrigation system and improve the service life of drip irrigation system.
