Monoammonium phosphate and diammonium phosphate are extremely familiar fertilizers for many farmers. Most farmers in Xinjiang are basically using diammonium phosphate: some farmers use compound fertilizer with diammonium phosphate; some farmers choose to use diammonium phosphate with urea and potassium sulfate; A small number of farmers directly use compound fertilizer as a base fertilizer. In the actual production process, some farmers do not use diammonium phosphate, and their hearts will not be practical. Why is this kind of psychology? Because in the eyes of many farmers, the phosphorus content in diammonium phosphate is high, and the effectiveness of phosphorus in soil in Xinjiang is poor. The effect of using diammonium phosphate is certainly good. But is it really good to use diammonium phosphate as the base fertilizer? Let us take a look at the characteristics of these two fertilizers. The difference between monoammonium phosphate and diammonium phosphate The ratio of nitrogen to phosphorus: the ratio of nitrogen to phosphorus of monoammonium phosphate is 1: (4-5); the ratio of nitrogen to phosphorus of diammonium phosphate is close to 1:2; according to the optimal absorption ratio of crops to elements, diammonium phosphate is more Easy to be absorbed and utilized. The second is the PH value of the two: monoammonium phosphate, after being dissolved in the soil, the pH is about 4.4, which is acidic, which is beneficial to the absorption and utilization of phosphorus by the crop; the diammonium phosphate is dissolved in the soil and the pH is about 8.0, which is alkaline; We all know that the salinity in Xinjiang is particularly serious. In alkaline soils, diammonium phosphate may release ammonia, causing damage to seeds and seedlings. Therefore, diammonium phosphate (DAP) should be used with caution in alkaline soils; The third is mixed with fertilizer: monoammonium phosphate (MAP) mixed with urea can reduce the loss of ammonia volatilization and improve the fertilizer utilization rate; when diammonium phosphate (DAP) is mixed with superphosphate, it will agglomerate due to the formation of dicalcium phosphate, and Phosphorus pentoxide is reduced in water solubility, and monoammonium phosphate (MAP) is mixed with superphosphate to reduce the degree of degradation. Practical application of monoammonium phosphate and diammonium phosphate 1. In Xinjiang, the soil is alkaline, and after the ammonium diammonium phosphate is applied to the soil, the chemical reaction occurs in the water, which will increase the alkalinity of the soil. On the one hand, it is easily fixed by calcium ions in the soil. The groundwater we usually use, the water hardness is high, the calcium ion content is high, and a large part is fixed by calcium ions in the water. Thus, the actual utilization efficiency of diammonium phosphate is very low. In this case, it is recommended to apply an acidic fertilizer, and the compound fertilizer is acidic when it is in contact with water. In the acidic case, phosphorus is not easily reacted with calcium, and the effectiveness is high. 2. The diammonium phosphate in the base fertilizer has a very high water hardness, a high soil calcium content, and a neutral or alkaline pH value. The actual utilization efficiency is extremely low, and only the application of acidic fertilizer can play a role. Suggestion: In areas with high water hardness and high soil calcium content, try to use acid fertilizer such as compound fertilizer, monoammonium phosphate and superphosphate to use as the base fertilizer instead of diammonium phosphate. At the same time, in the growing season, the water-soluble phosphate fertilizer is supplemented by drip irrigation or sprinkling a small amount of times to ensure the normal supply of phosphate fertilizer. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone We're professional Orthopedics Instruments
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