Pear orchard soils lack of calcium, iron, zinc, boron and other trace elements are common, especially in southern pear orchards that lack phosphorus, potassium, calcium, and magnesium, and soil acidification is serious. Therefore, high-yield pear orchards must do the following fertilization principles.
Fertilization principles: 1. Increase the application of organic fertilizer, plant green manure in orchards, cover straw, and fertilize the soil. Orchards with severe soil acidification should be improved by applying lime and organic fertilizer. 2. According to the soil fertility conditions of the pear orchard and the growth status of the pear trees, appropriately reduce the amount of nitrogen and phosphorus fertilizers, increase the application of potassium fertilizer, and supplement calcium, magnesium, iron, zinc, boron and other trace elements by spraying on the leaves. 3. Combining green cultivation techniques for increasing yields, yield levels, and soil fertility conditions, determine the fertilizer application period, amount and nutrient distribution ratio. 4. Optimize the method of fertilization, change the spreading application to strip application or hole application, rationally coordinate irrigation and fertilization, and adjust fertilizer with water. 5. Fertilization must be used together with photosynthetic nutrient film fertilizer, which can help plants absorb a large amount of light fertilizer, light energy, light, compatible with conventional fertilizers, and nutrients to provide plants to the limit of growth and development. Benefit from one application throughout the year.
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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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