How to use phosphate fertilizer is good
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Phosphorus in the soil generally cannot meet the needs of crops and must be supplemented by fertilization. However, phosphorus has its strange temper, and it can only be applied in accordance with its temper. First, early application of crops to absorb phosphorus at the seedling stage is the fastest, accounting for half of the total phosphorus absorbed during the growth period. If phosphorus is lacking at the seedling stage, it will affect later growth. Even if it is supplemented later, it will be difficult to recover the loss of phosphorus. No phosphorus deficiency at seedling stage. Second, finely applied superphosphate is easy to absorb moisture and agglomerate when it is stored. When it is applied, it must be smashed and sifted so as to absorb the root system. Third, concentrated application of phosphorus is easily fixed by iron, aluminum, and calcium in the soil and fails. Therefore, the application of acupuncture points and strips to fix the phosphorus around the seeds and roots can reduce the fixation with the surrounding soil and facilitate root absorption. Fourth, with the application of organic fertilizer mixed with phosphate fertilizers, especially calcium magnesium phosphate fertilizer and organic fertilizer, can make phosphorus insoluble phosphate insoluble in the available crops can use the effective phosphorus. Fifth, the application of phosphate fertilizer in layers is less mobile in the soil, where the application is not shown. Therefore, the application of phosphate fertilizer in the bottom layer and the shallow layer is to apply the phosphate fertilizer in the shallow layer, which is beneficial to the absorption of the seedlings, thereby promoting the return to the early morning and the fast delivery. Generally, 20-40 kg of phosphate fertilizer is applied per acre, one third of the shallow layer is applied, and two thirds of the deep layer is applied. Sixth, the application of nitrogen fertilizer mixed crops to absorb a variety of nutrients have a certain proportion, if the imbalance is not good long. 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 disappearance of nitrogen in the soil, causing imbalance in the ratio of nitrogen and phosphorus. The combined use of nitrogen and phosphorus can balance nutrients, but also promote the root bar, lay the foundation for high yield. VII. After the roots are sprayed on the crops to the late growth stage, the roots are gradually aging and the ability to absorb nutrients is weakened, often resulting in phosphorus deficiency. At this time, water-soluble superphosphate can be sprayed on the leaves of the crops so that phosphorus can enter the plants through the pores or stratum corneum of the leaves. Cereal crops can be used at concentrations of 1-3%, and vegetables can be sprayed at 1% concentration on sunny mornings or evenings. In the phosphorus-deficient soils, red phosphorus soils, yellow mud fields, duck muddy muddy fields, cold flooded fields and other phosphorus were used, and the application of phosphate fertilizers increased the yield significantly. Fertilizers and pastures where large quantities of phosphate fertilizer was continuously applied in past years can be applied in small quantities.