How to play the best effect of phosphate fertilizer

Phosphorus in the soil generally can not meet the needs of crops, must be supplemented by fertilization, but the phosphorus has its "strange temperament", only along its "temper" to apply talent.

First, early application

Crops absorb phosphorus at the seedling stage 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, so the seedling period can not be lacking. phosphorus.

Second, fine

Superphosphate is easy to absorb moisture and agglomerate when it is stored. When it is applied, it must be sifted and sieved to absorb the root system.

Third, concentrated

Phosphorus is easily deactivated by immobilization of iron, aluminum, and calcium in the soil. Therefore, the application and application of phosphorus at the acupoints to fix the phosphorus around the seed and the root system can reduce the fixation with the surrounding soil and facilitate the absorption of the root system.

Fourth, mixed with organic fertilizer

Phosphate fertilizers, especially calcium magnesium phosphate fertilizers and organic fertilizers, can convert those insoluble phosphates in phosphate fertilizers into available phosphorus for crops.

Fifth, hierarchical application

Phosphate fertilizer has a low mobility in the soil, and where it is applied is basically where it cannot be 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, mixed with nitrogen fertilizer

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 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.

Seventh, outside the root spray

When the crops reach the late growth stage, the roots are gradually aging and the ability to absorb nutrients is reduced, often causing 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.

Eight, in the phosphorus-deficient soil

Red soil, yellow mud fields, cold flood fields, etc. are all lack of phosphorus, the application of phosphorus fertilizer significantly increase production. Fertilizers and pastures where large quantities of phosphate fertilizer was continuously applied in past years can be applied in small quantities.

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Posted on July 04, 2020