First, cabbage vegetables
These vegetables have large leaf areas and large transpiration, but the roots are shallow, requiring high soil water content and fertility. This type of vegetable is increased in yield by increasing the number of leaves and leaf area. Therefore, it is especially important to supply sufficient nitrogen. If the supply of nitrogen is insufficient, the plants are short, the leaves are few, the leaves at the base of the stem are easy to wither and yellow, and the tissues are thick and hard. Too much nitrogen, high water content in the side tissue, is not conducive to storage, and is susceptible to disease. In the later stage, when the supply of phosphorus and potassium is insufficient, it is often difficult to form a ball.
Second, cabbage vegetables
Such vegetables include cabbage, broccoli, broccoli and Brussels sprouts. Cabbage has a limited amount of nitrogen, phosphorus and potassium absorption before the ball-forming period, and after entering the ball-forming period, the nutrient absorption increases rapidly due to the large increase in growth. The nitrogen, phosphorus and potassium nutrients of broccoli are the most absorbed. Only by ensuring the coordinated supply of N, P and K in the long term can the high yield and quality of cabbage vegetables be guaranteed. Another cabbage-like vegetable is a typical calcium-loving crop. When the soil is deficient in calcium and forms physiological calcium deficiency, it causes the edge of the leaf to dry up, affecting yield and quality.
Cauliflower is sensitive to boron. When boron is deficient, it may cause cracking of petiole or lobule, and the center of flower stem is cracked. The flower ball has brown spots and slightly bitter taste. The solution is to use the “new boron†fertilizer leaf spray. At the same time, according to the abundance of soil element content, molybdenum, zinc and iron fertilizer are applied in time.
Third, green leafy vegetables
Such vegetables include spinach, lettuce, celery, alfalfa, lettuce, and fennel. These vegetables have shallow roots, rapid growth, and high planting density. Therefore, the requirements for fertilizer and water conditions are high. Their nutritional characteristics are: when N is sufficient, the leaves are tender and juicy and less fiber; when N is insufficient, the plants have more short fibers, less leaves, yellowish and rough, easy to smoke early, and lose edible value.
Fourth, onion and garlic vegetables
Such vegetables include leeks, garlic, green onions, and onions. The nutrient requirements of these vegetables are generally N, with appropriate P and K fertilizers. For onions and garlic, focus on controlling N, increase P, K, promote onion swelling, garlic bolting; for leeks, reapply N fertilizer to promote vigorous growth and ensure the production of squat.
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Virus Specimen Collection Tube
Inspection principle:
It can perform protein denaturation on fresh clinical virus samples to inactivate the virus, prevent secondary transmission of infection, and ensure the safety of transportation and testing personnel.
♣.Structural composition: Combination of cotton swab and transport medium (VTM).
♣. Product requirements:
The product should be airtight, avoid high temperature, avoid direct sunlight storage. It should be used in a clean, hygienic, pollution-free, and temperature-friendly environment.
♣, Storage conditions and validity period:
â‘ , the product should be stored in a clean, dry and ventilated environment,
②, the temperature is 5℃-35℃;
â‘¢, relative humidity <85%RH;
â‘£, product shelf life: 12 months.
♣. How to use
â‘ Before sampling, mark relevant information on the label of the sampling tube.
â‘¡. Sampling with the corresponding cotton swabs.
â‘¢ After the collection is completed, quickly put the cotton swab into the collection tube, break the part higher than the sampling tube, and tighten the tube cover.
â‘£. For the specific sampling method, please refer to the following:
a) Nasal swab Gently insert the sampling head into the nasal cavity, stop for a while and then slowly rotate to exit, immerse the collected specimen in the Xiangxiang solution, break the excess part and discard it, and tighten the sampling tube cover.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with the sampling head, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
c), Mycoplasma Chlamydia, Ureaplasma specimen collection
Male: Insert the sampling head into the urethra about 2cm and rotate, stay for a while and then exit, and immerse the collected specimen in the sampling solution.
Female: Wipe the mucus of the cervical orifice, insert the sampling tip into the cervical canal for 1-2 cm for sampling, immerse the collected specimen in the sampling solution, break off the excess part and discard it, and tighten the cap of the sampling tube.
♣. Precautions
1. After the virus is collected, the disposable sampling swab should be completely inserted into the preservation solution, so that the virus can be retained to the greatest extent possible.
â‘¡ The collected specimens must be sent for inspection in time.
â‘¢. It is forbidden to use products with damaged packaging and expired validity period to prevent pollution.
This single-use Virus Sampling Tube is used for in vitro diagnosis. It cannot be used for human or animal oral or external use. If swallowed, it may cause serious events; it is irritating to eyes and skin. If it is not splashed into the eyes, rinse with water.
Virus Sampling Tube,Virus Specimen Collection Tube,Viral Transport Tube,Saliva Virus Sampling Kit
Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com