There are four taboos to be used to avoid fertilizer damage
Seed fertilization is an important method of scientific fertilization, but the application of seed fertilizer is technically strong, especially the selection of seed fertilizer is very particular. Improper use of seeds is harmful to the seeds and their rooting, thus delaying the season and causing losses. In the selection of seed fertilizers, there are the following "four taboos." Do not use corrosive fertilizers, such as ammonium bicarbonate, ammonia water, etc., volatile and corrosive, easily smoked seeds and seedlings, superphosphate contains free sulfuric acid and phosphoric acid, will cause damage to seed germination and seedling growth, generally not suitable to do fat. This kind of fertilizer should be applied when plowing, or applied to the lower layer of the sowing ditch, not in direct contact with the seeds, or mixed with earth fertilizer. Avoid the use of toxic fertilizer urea in the growth process of the crop, often produce a small amount of adipic acid, the content of acetonitrile if more than 20%, will produce poison to the seed and seedlings. In addition, urea molecules with a high nitrogen content penetrate into the protein molecules of the seed, denature the protein, and poison the seeds and young roots. Avoid strong alkali fertilizers Alkaline fertilizers include kiln ash potash, steel slag phosphate fertilizer, etc. Kiln ash potash contains more calcium, strong water absorption, absorbs mature lime, and releases a lot of heat, easily burning seeds and young roots. When composting, it must be fully mixed with organic fertilizer which is higher than 10 times, and applied to the lower layer of the sowing ditch (hole). Do not make direct contact with the seed, and pay attention to timely covering the soil after sowing so as to prevent damage. Avoid using unripe farmyard fertilizers. Farmhouse manures that have been adequately decomposed can be used as seed fertilizers. They are applied near the seeds when sown, and they work well. However, if the farmyard manure is not cooked as a fertilizer, the fertilizer will release a lot of heat during the fermentation process, which will not only easily cause burning of roots, but will also cause ammonia to burn the seedlings. Farmyard manures are subjected to high-temperature fermentation after stacking, and they can be used as seed fertilizers after they are fully cooked.
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. Biomed Vtm Kit,Vtm Test Kit,Saliva Collection Tube,Virus Sample Collection Tube Jilin Sinoscience Technology Co. LTD , https://www.jilinsinoscience.com
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.