What is the best way to apply phosphate fertilizer?

Apply Phosphate Fertilizer Early

Crops absorb phosphorus the fastest in the seedling stage, accounting for half of the total phosphorus absorbed by the crop throughout the growth period. If the crop is deficient in phosphorus at the seedling stage, it will affect the later growth. , so pay attention to not be deficient in phosphorus in the seedling stage of crops. The following are the manifestations of phosphorus deficiency in corn:

Fine phosphate fertilizer

Superphosphate is easy to absorb moisture and agglomerate during storage, so when applying, it must be broken and sieved to facilitate the absorption of crop roots.

Acupuncture, strip application

Concentrated phosphorus application is easily fixed by elements such as iron, aluminum, and calcium in the soil and fails. Therefore, when applying, it should be applied in holes and strips, so that phosphorus is fixed around the seeds and roots, which can not only prevent phosphorus from being fixed by iron, aluminum, calcium and other elements in the surrounding soil, but also facilitate the absorption of crop roots.

Mixing Phosphate and Organic Fertilizers

Mixing phosphate fertilizers, especially calcium magnesium phosphate fertilizers and organic fertilizers, can convert the insoluble phosphorus in phosphate fertilizers into effective phosphorus that crops can easily absorb.

Deep and shallow application

Phosphate fertilizer is applied in layers and has little mobility in the soil, and it basically does not move where it is applied, so phosphorus fertilizer should be applied in both deep and shallow layers. Applying phosphate fertilizer in the shallow layer is conducive to the absorption of seedlings, so that the crops can turn green early and tiller quickly. The application of phosphate fertilizer is generally 1/3 of the shallow layer and 2/3 of the deep layer.

Combined application of nitrogen and phosphorus and mixed application of nitrogen fertilizer

Crops absorb a certain proportion of various nutrients, and if the proportion is out of balance, it will not grow well. The application of nitrogen and phosphorus can not only balance nutrients, but also promote root growth and lay the foundation for high yields.

root spray

When crops reach the late stage of growth, the root system gradually ages, and the ability to absorb nutrients is weakened, which often leads to phosphorus deficiency. At this time, water-soluble calcium superphosphate can be sprayed on the leaves of crops, so that phosphorus can enter the body of the plant through the stomata or cuticle of the leaves.