1, no annual fertilization After the application of phosphate fertilizer, the crops in the quarter can generally only absorb a small part of them, but the subsequent effects can last for several years. 2, early application of phosphate fertilizer When crops are in seedling stage, the absorption of phosphorus is fastest, which accounts for half of the total phosphorus absorbed during the whole growing period of crops. If the crop is lack of phosphorus at seedling stage, it will affect the growth in the later period. Even if it is added later, it will be difficult to recover the loss of early phosphorus. Therefore, we must pay attention to the lack of phosphorus in the seedling stage of crops. 3, mixed with phosphate fertilizer and organic fertilizer Mixed application of phosphate fertilizers, especially calcium, magnesium phosphate fertilizers and organic fertilizers, can convert those insoluble phosphates in phosphate fertilizers into available phosphorus that can be easily absorbed by crops. 4, deep and shallow application Phosphorus fertilizers are used in stratified applications in soils. Therefore, phosphate fertilizers should be applied in both deep and shallow layers. 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. 5, nitrogen and phosphorus application and nitrogen fertilizer mixed application There is a certain proportion of crops that absorb various nutrients, and if they are out of proportion, they will not grow well. The combination of nitrogen and phosphorus should also be used to balance nutrients and promote root growth, laying the foundation for high yields. 6, the root spray When crops reach the late growth stage, the roots gradually age and their ability to absorb nutrients decreases, often causing phosphorus deficiency. At this time, water-soluble superphosphate can be sprayed on the leaves of the crop, so that the phosphorus fertilizer enters the plant through the pores or stratum corneum of the leaves. Multiplex RT-PCR Test Reagent Kit Of COVID-19(ORF1ab)/Influenza A/Influenza B The Multiplex RT-PCR Test Reagent Kit Of COVID-19(ORF1ab)/Influenza A/Influenza B is a real-time reverse-transcription polymerase chain reaction (RT-PCR) test reagent that detects and differentiates RNA from SARS-CoV-2, influenza A virus, and influenza B virus in upper or lower respiratory specimens. The assay provides a sensitive, nucleic-acid-based diagnostic tool for evaluation of specimens from patients in the acute phase of infection. Multiplex RT-PCR test reagent kit,Multiplex RT-PCR test reagent,Multiplex RT-PCR test kit,Multiplex real time PCR test reagent,Multiplex real-time PCR test reagent Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimed-global.com