Phosphorus fertilizer is one of the “three elements†of nutrition necessary for crop growth. However, in production practice, excessive application of phosphate fertilizer is not uncommon, and the utilization rate of phosphate fertilizer is generally low. How can we increase the efficiency of phosphate fertilizer application? Economic application. After the application of phosphate fertilizer, only a small part of the crop can be used during the season, and the aftereffect can last for several years. Therefore, the phosphate fertilizer does not have to be applied annually to avoid wastage. There is no shortage of phosphorus. For adequate organic fertilizers, soil-rich phosphorus, or in the past to pay attention to the application of phosphate fertilizer, has been continuous application of large amounts of phosphate fertilizer in the field can be applied with little or no application of phosphate fertilizer. Phosphate fertilizers were mainly applied to soils lacking phosphate fertilizers such as red soil, yellow mud fields, duck muddy mud fields, and cold flood fields. Apply early. The early application of P fertilizer is due to the fastest absorption of P by crops at seedling stage, which accounts for about 50% of the total P absorbed during the growing season. Phosphorus at the seedling stage will eventually affect the growth of later stage. Even if it is added later, it will be difficult to recover the loss of early P deficiency. Therefore, the seedling period can not be lack of phosphorus. The fine application is to be applied after crushing. The superphosphate is easy to absorb moisture and agglomerate when it is stored. When it is applied, it must be smashed and sifted. It is best to use fine powder to facilitate root absorption. Centralized application. As we all know, phosphorus has the characteristics of being easily immobilized by elements such as iron, aluminum, and calcium in the soil. Therefore, the application and application of phosphorus should be distributed around the seed and root system, which will not only facilitate absorption and utilization, but also effectively reduce the phenomenon of failure due to fixation by other elements. Layered application. Phosphate fertilizer is less mobile in the soil and where it is applied is basically where it does not move. Therefore, phosphate fertilizers should be applied in both deep and shallow layers. The application of phosphate fertilizer to the shallow layer is beneficial to the absorption of seedlings, so that the crops will return to the early stage and the crops will be delivered quickly. In general, shallow application accounts for 1/3, and deep application accounts for 2/3. With organic fertilizer application. Phosphorus fertilizers, especially calcium, magnesium phosphate and organic fertilizers are mixed with suitable organic fertilizers. After application, the insoluble phosphates in the phosphate fertilizers can be converted into available phosphorus that can be easily absorbed by crops to increase the utilization rate. With nitrogen fertilizer application. There is a certain proportion of crops that absorb various nutrients, and if they are out of proportion, they will not grow well. Single application of nitrogen fertilizer, root development is not good, easy lodging, but also vulnerable to pests and diseases, but also to accelerate the excessive decomposition of nitrogen in the soil, causing imbalance in the ratio of nitrogen and phosphorus. The combination of nitrogen and phosphorus can not only balance nutrients, promote robust growth, but also help high quality and high yield. Root spray. At the later stage of crop growth, the roots are gradually aging and the ability to absorb nutrients is weakened, often causing a lack of phosphorus. At this time, the top-dressing fertilizer is used to spray water-soluble superphosphate on the leaves of crops. Phosphorus nutrition will enter the plants through the stomata or the stratum corneum of the leaves, which can greatly increase the utilization rate. General cereal crops can use 1% to 3% of the concentration of phosphate fertilizer solution, fruit and vegetable crops can be used 1% of the concentration of phosphate fertilizer solution, before 9 o'clock in the sunny weather or after 4 pm spraying. Rubber Sole for work boots, labor
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