Efficient application of phosphate fertilizer

Phosphorus in soil generally cannot meet the needs of crops and must be supplemented by fertilization. However, phosphate fertilizer has its particularity, and it can only exert its maximum fertilizer efficiency according to its specific application.

Early application of crops in the seedling stage absorbs phosphorus at the earliest stage, accounting for half of the total phosphorus absorbed in the growing season. If the phosphorus deficiency in the seedling stage will affect the later growth, it will be difficult to recover the loss of phosphorus deficiency even if it is applied later, so the seedling stage cannot Phosphorus deficiency.

Fine application of superphosphate is easy to absorb moisture and agglomerate during storage. When applied, it is broken and sieved to facilitate root absorption.

Concentrated phosphorus application is easily disabled by iron, aluminum, calcium, etc. in the soil. Therefore, it should be applied to the acupoints and strips to fix the phosphorus around the seeds and roots, which can reduce the fixation of iron, aluminum and calcium in the surrounding soil, and is beneficial to root absorption.

Mixing with organic fertilizers, especially calcium, magnesium and phosphorus fertilizers and organic fertilizers, can convert the poorly soluble phosphorus in the phosphate fertilizer into effective phosphorus that can be absorbed by crops.

The layered phosphate fertilizer has little mobility in the soil, and it is basically where it is not moved. Therefore, phosphate fertilizer is applied to both the bottom layer and the shallow layer. Applying the phosphate fertilizer to the shallow layer is conducive to the absorption of the seedlings, thereby promoting early returning and quickning. Generally, 20-40 kg of phosphate fertilizer is applied per hectare, one third of the shallow layer is applied, and two thirds of the deep layer is applied.

Mixed with nitrogen fertilizer, the crops absorb a certain proportion of nutrients, and if the ratio is out of balance, it will not grow well. Single application of nitrogen fertilizer, root system is not well developed, easy to fall, and vulnerable to pests and diseases, and accelerate the excessive disappearance of nitrogen in the soil, causing imbalance of nitrogen and phosphorus. The combination of nitrogen and phosphorus can balance the nutrients and promote the roots to lay the foundation for the high yield.

When the crops were sprayed outside the roots, the roots gradually became aging, and the ability to absorb nutrients was weakened, often resulting in phosphorus deficiency. At this point, insoluble calcium superphosphate can be sprayed onto the crop leaves to allow phosphorus to enter the plant through the stomata or stratum corneum of the foliage. Cereal crops can be used at a concentration of 1% to 3%, and vegetables can be applied at a concentration of 1% on a sunny morning or evening.

In the soil with phosphorus deficiency, the application of phosphate fertilizer in the red soil dry field, the yellow mud field, the duck hoe field, the cold immersion field, etc. is significant, and the fertilizer field and the field where the phosphate fertilizer is continuously applied in a large amount in the past can be appropriately applied.
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