How to apply phosphate fertilizer
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I. Economic application of phosphate fertilizer After the application of phosphate fertilizer, seasonal crops can only absorb a small part of it, and the later effects can last for several years. Therefore, in the years after the application of phosphate fertilizer, it is not necessary to apply annually, which can avoid waste and reduce the economic burden of purchasing fertilizer.
2. Early application of phosphate fertilizers The fastest absorption of phosphorus in the seedling stage is to account for half of the total phosphorus absorbed by the crop during the whole growth period. If the crops are deficient in phosphorus during the seedling stage, it will affect the later growth, even if it is replenished later. Loss of phosphorus deficiency in the early stage, so it is necessary to pay attention to the lack of phosphorus in the seedling stage of crops.
Third, the fine application of phosphate fertilizer superphosphate is easy to absorb moisture and agglomerate during storage, so when applied, it must be broken and sieved to facilitate the absorption of crop roots.
4. The application of phosphorus in the acupoint application and application of phosphate fertilizer is easily fixed by the elements of iron, aluminum and calcium in the soil. Therefore, at the time of application, the application and application of the hole should be carried out to fix the phosphorus around the seed and the root system, so as to avoid the fixation of the iron, the aluminum, the calcium and the like in the surrounding soil, and the absorption of the root of the crop.
5. Mixed application of phosphate fertilizer and organic fertilizer Mixed application of phosphate fertilizer, especially calcium magnesium phosphate fertilizer and organic fertilizer, can convert the insoluble phosphorus in the phosphate fertilizer into the effective phosphorus which is easily absorbed by crops.
6. The application of layered application of deep and shallow layer of phosphate fertilizer in the soil is small, and the application is basically where it does not move. Therefore, phosphate fertilizer should be applied in both the deep and shallow layers. Applying the phosphate fertilizer to the shallow layer is conducive to the absorption of the seedlings, so that the crops turn back early and the tillers are fast. The application of phosphate fertilizer is generally 1/3 in shallow layer and 2/3 in deep layer.
Seven, nitrogen and phosphorus combined application and nitrogen fertilizer mixed crops to absorb a variety of nutrients, if the proportion is not good, it is not good. Single application of nitrogen fertilizer, root system is not well developed, easy to fall, and vulnerable to pests and diseases, and accelerate the excessive decomposition of nitrogen in the soil, causing imbalance of nitrogen and phosphorus. The combination of nitrogen and phosphorus can balance nutrients and promote root growth, laying a foundation for high yield.
8. When the crops are sprayed outside the roots, the roots are gradually aging, and the ability to absorb nutrients is weakened, often resulting in phosphorus deficiency. At this time, the water-soluble calcium superphosphate can be sprayed on the leaves of the crop to allow the phosphorus to enter the body of the plant through the pores or stratum corneum of the foliage. For cereal crops, 1%-3% of phosphate fertilizer can be used, and vegetables can be sprayed with 1% phosphate fertilizer on sunny or early evening.
Huaxian Liu Huimin