In autumn, the growth of Chinese cabbage enters the late stage. At this time, it is also a period of rapid growth of Chinese cabbage. If water and fertilizer are supplied properly during this period, attention should be paid to the prevention and control of pests and diseases, and the yield can be greatly increased.
1. Rosette period: The outer leaves grow rapidly. 85% of the roots in the roots are distributed on the surface layer of the soil. Generally, large manure water should be poured in the first ten days of September, and 2000 kg per mu. The new high-fat film 600-800 times liquid is sprayed on the surface of the vegetable leaf to prevent the infection of the bacteria, and the source of the pest is isolated to make the leaves green and lush.
Second, the core period: the leaf ball began to grow rapidly and enriched. At this time, the manure water was poured again, 2000 kg per mu or 10 kg of urea. After 10 days, it was necessary to water and apply 10 kg of potassium sulfate.
Third, the balling period: During this period, the weather gradually turned cold, and the cabbage gradually transferred from the rapid growth period to the slow growth period and nutrient accumulation stage. It is not necessary to use large water and big fertilizer. If water is needed, the water should be stopped in 7 days before harvest to improve its quality.
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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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