Phosphate fertilizers are applied to crops most sensitive to phosphorus, such as beans, rapeseeds, wheat, cotton, potatoes, and melons. Appropriate application of these phosphate fertilizers can result in higher economic benefits. Therefore, the following points should be applied when applying phosphate fertilizers:
First, the economic application of phosphate fertilizer after the application of phosphate fertilizer, seasonal crops generally can only absorb a small part of them, and the latter effect can last for several years. Therefore, in the years after the application of phosphate fertilizer, there is no need to apply it annually, which can avoid waste and reduce the economic burden of purchasing fertilizer.
Second, early application of phosphorus fertilizer crops at the seedling stage when the absorption of phosphorus is fastest, to account for half of the total phosphorus absorbed by the crop during the whole growth period, if the crop is lack of phosphorus at seedling stage, will affect the growth of the later period, even if the later period make up is difficult to restore The early lack of phosphorus, so pay attention to the lack of phosphorus in the seedling stage of crops.
Third, the fine application of phosphate superphosphate in the storage easy to absorb moisture agglomeration, so when applied, must break through the sieve in order to facilitate the absorption of crop roots.
Fourth, acupuncture points, the application of phosphate fertilizer concentrated phosphorus easily by the soil of iron, aluminum, calcium and other elements fixed failure. Therefore, when applying, holes and strips should be applied to fix the phosphorus around the seeds and roots. This can prevent phosphorus from being fixed by elements such as iron, aluminum, and calcium in the surrounding soil, and it is also beneficial to the absorption of crop roots.
Fifth, mixed application of phosphate fertilizer and organic fertilizer mixed with phosphate fertilizer, especially calcium magnesium phosphate fertilizer and organic fertilizer, can make phosphorus in those insoluble phosphorus into agricultural crops easy to absorb the effective phosphorus.
Six, deep and shallow application of phosphate fertilizer layered application of small mobility in the soil where the application is basically where it does not move, so in the deep and shallow layers should be applied phosphate fertilizer. The application of phosphate fertilizer to the shallow layer is beneficial to the absorption of seedlings, so that the crops will return to the early stage and the crops will be delivered quickly. The application of phosphate fertilizer is generally applied 1/3 in the shallow layer and 2/3 in the deep layer.
Seven, nitrogen and phosphorus with the application of nitrogen fertilizer and mixed crops to absorb a variety of nutrients have a certain proportion, if the ratio is not good long-term imbalance. 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 decomposition of nitrogen in the soil, causing imbalance in the ratio of nitrogen and phosphorus. The combined application of nitrogen and phosphorus can not only balance nutrients, but also promote root growth, laying the foundation for high yields.
8. After spraying the crops outside the roots to the late growth stage, the roots are gradually aging and the ability to absorb nutrients is weakened, often causing phosphorus deficiency. At this time, water-soluble superphosphate can be sprayed on the leaves of the crop, so that phosphorus enters the plant through the pores or stratum corneum of the leaves. Cereal crops can use 1%-3% phosphate fertilizer, vegetables can use 1% phosphate fertilizer. Spray on a sunny morning or evening.
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