Guava has less sugar, low sweetness, sweet taste, not brittle meat, easy to hollow, and is particularly serious due to anthrax, which is closely related to the lack of supply of phosphorus, potassium, calcium and magnesium fertilizer. If the phosphorus, potassium, calcium and magnesium fertilizers are added in time during the summer flowering of guava to ensure sufficient supply of phosphorus, potassium, calcium and magnesium fertilizers, these phenomena will not occur, so that the fruit is sweet, the flesh is crisp, the fruit is not hollow, and the anthracnose is not bad. fruit. The specific practices are as follows:
When buds begin to appear in summer, the roots are applied with phosphorus, potassium, calcium and magnesium fertilizers. Each plant applies 2 to 3 kg of superphosphate or calcium magnesium phosphate, 0.5 to 0.75 kg of magnesium sulfate, 0.25 to 0.5 kg of potassium sulfate, 0.75 to 1 Kilograms of NPK (15-15-15) potassium sulphate or sulphur sulphate or pure sulphur based compound fertilizer. Around the canopy drip line, dig deep and wide annular grooves of 25-30 cm each, mix all the fertilizers thoroughly and spread them in the annular groove, cover the soil.
At the same time, spray the 800-1000 times Xingpeng Phosphate Potassium No.1, 800-1000 times Starpowder Calcium and Magnesium No.1 mixture, or 0.1% magnesium sulfate, 0.3% potassium dihydrogen phosphate, 800 times every 10-15 days. Chelate the calcium mixture and spray it continuously for 3 to 5 times. Evenly spray all the branches, buds and fruits inside and outside the canopy, and it is advisable to start dropping the drops of water, and add phosphorus, potassium, calcium and magnesium fertilizer from the leaves.
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The generic name of VTM Virus Sampling Tube is a single-use virus sampling tube, which is generally used for the detection and sampling of infectious pathogenic microorganisms in disease control departments and clinical departments. It is suitable for detection and sampling of influenza viruses (including general influenza, highly pathogenic viruses, H1N1 influenza virus, etc.), hand, foot and mouth virus, new coronavirus, measles and rubella and other types of viruses. VTM virus sampling tube can also be used for detection and sampling of Mycoplasma, Chlamydia and Ureaplasma urealyticum.
The virus and related samples in the VTM virus sampling tube should be stored and transported within 48 hours in a refrigerated state (2-8°C). Viruses and related samples can be stored for a long time in -80℃ environment or liquid nitrogen environment. The virus can maintain the activity of the virus in a lower temperature range, reduce the speed of virus decomposition, and improve the positive rate of virus isolation.
The VTM virus sampling tube is generally equipped with a disposable flocking swab. From the appearance point of view, the flocking swab is white and soft. Using this soft brush during the sampling process will make the user feel no foreign body, and it is suitable for different Partial sampling person. Moreover, the flocking swab is designed with a breaking point that conforms to the length of the sampling tube and the natural orifice of the human body, which is not only convenient for sampling but also convenient for transportation of the specimen.
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