How to use phosphate fertilizer is good
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How to Use Phosphorus Fertilizers with Good Effects Phosphorus in soils generally cannot meet the needs of crops and must be supplemented by fertilization. Phosphate fertilizers, however, have their own temperaments, and they can only be applied in accordance with their temper. Early application of crops to absorb phosphorus at the seedling stage is fastest, accounting for half of the total phosphorus absorbed during the growth period. If phosphorus deficiency at seedling stage will affect the growth of the later stage, even if it is supplemented later, it will be difficult to recover the loss of phosphorus, so the seedling stage Can not lack phosphorus. Fine 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. Phosphorus concentrate can be easily deactivated by immobilization of iron, aluminum, and calcium in the soil. 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 the absorption of the roots. Phosphate fertilizers mixed with organic fertilizers, especially calcium magnesium phosphate fertilizers and organic fertilizers, can convert those insoluble phosphates in phosphate fertilizers into available phosphorus for crops. Phosphorus fertilizers in the layered layer are less mobile in the soil, and where they are applied, they are 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. In general, 20--40 kg of phosphate fertilizer is applied per acre, one third of shallow application and two thirds of deep application. Mixed with nitrogen fertilizer application crops have a certain percentage of absorption of various nutrients, 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 application of nitrogen and phosphorus can balance nutrients, but also promote the root bar, lay the foundation for high yield. 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 causing a lack of phosphorus. At this time, water-soluble superphosphate can be sprayed on the leaves of the crop to allow phosphorus to enter the plants through the pores or stratum corneum of the leaves. Cereal crops can be used in concentrations of 1-3%, and vegetables can be sprayed in 1% concentrations on sunny mornings or evenings. In phosphorus-deficient soils, red phosphorus soils, yellow mud fields, duck muddy mud fields, cold-water immersed fields, and other phosphorus, the application of phosphate fertilizer increased significantly. Fertilizers and pastures where large quantities of phosphate fertilizer was continuously applied in past years can be applied in small amounts.