Covering cultivated crops with mulch can make crops mature, high yield, and improve quality. However, in the actual production process, most of the mulches have to be discarded due to improper use. In order to increase the utilization rate of the plastic film and reduce the production investment, the plastic film is used several times. The main methods are as follows:
1. The use of wheat and melon: that is, from the end of November to the beginning of winter, wheat is covered with a new film, and the second year of spring will be covered with wheat in mid-March, and then the covered plastic film will be covered in early April.
2, wheat, vegetables many times: from the end of November to the middle of the second year in mid-March, covered with wheat, and then cover the spring vegetables, remove the film about 10 days, to cover the summer vegetables in early April, and some even cover autumn vegetables. As long as you carefully remove the plastic film, you can generally use it four times.
3, film removal, a film covering different crops several times. Winter Wheat: Cabbage - Cucumber (or Tomato), Winter Wheat - Raw Bamboo Shoot - Tomato (Cucumber), Winter Wheat - Cumin - Sweet Pepper, Winter Wheat - Radish - Chinese Cabbage - Kidney Bean, Winter Garlic - Rob - cowpea - tomatoes, winter spinach - water radish - cumin - tomatoes. In the above example, radishes, fennel, and other fast-growing vegetables can be used for mutual adjustment, and the third-fruits of melon, fruit, and vegetables can also be converted to each other.
4, cover a film in the end, only change the crop. Such as covering the film, the first cabbage, after planting sweet peppers, autumn and then planted bamboo shoots or spring beans, autumn cucumber.
5, first for the film, and then for a small arch. First cover the wheat with a plastic film. After peeling off, use a plastic film to build a small shed to grow vegetables such as kidney beans. It is also possible to grow cucumbers in small sheds in plastic sheds in greenhouses, peel off mulch and use them for the cultivation of vegetables such as tomatoes.
Diagnostic reagents can be divided into two categories: in vivo diagnostic reagents and in vitro diagnostic reagents. It is mostly a reagent for detection by the reaction between antigen and antibody.
A: Classification of in vitro diagnostic reagents:
1. In vitro biodiagnostic reagents managed as drugs include:
1. Blood type and tissue type reagents;
2. Microbial antigen, antibody and nucleic acid detection reagents;
3. Tumor marker reagents;
4. Immunohistochemistry and human tissue cell reagents;
5. Human genetic testing reagents;
6. Biochips;
7. Allergy diagnostic reagents.
2. In vitro reagents managed as medical devices include:
1. Clinical basic test reagents;
2. Clinical chemistry reagents;
3. Blood gas and electrolyte determination reagents;
4. Vitamin determination reagents;
5. Cell histochemical stains;
6. Autoimmune diagnostic reagents;
7. Microbiological test reagents.
B: According to medical test items, clinical diagnostic reagents can be roughly divided into clinical chemical test reagents, immunology and
Serological testing reagents, hematological and cytogenetic testing reagents, microbiological testing reagents, body fluid excretion
Detection reagents, genetic diagnosis reagents, etc. Among them, the market share of clinical chemistry
The largest, close to 34%; followed by the immunology market, accounting for about 29%. Novel immunodiagnostic reagents and genetic diagnostic tests
The reagent was developed in the late 1980s, and it is the most common diagnostic reagent for all current diagnostic reagents, regardless of technology or market.
The fastest growing product.
Urine Rapid Test Kit,Rapid Test Kit 6-Panel,Toxoplasma rapid test kits,Fecal Occult Blood Test
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