The Beijing Agricultural Technology Extension Station introduced bananas in 2003 and studied its cultivation techniques in northern greenhouses. In 2008, the planting of more than 3,000 square meters of banana forest in the multi-span greenhouses of Xiaotangshan Special Vegetable Grand View Garden attracted a large number of tourists to pick and go. The banana tree is beautiful in appearance and very tropical. It is the first choice for tropical fruit trees grown in northern leisure and sightseeing greenhouses and ecological restaurants in recent years. 1, the requirements of the greenhouse environment The banana tree is tall and erect and does not tolerate low temperatures. The minimum temperature requirement is above 10°C. Therefore, it is best to choose a modern multi-span greenhouse with a height of more than 4 meters for the cultivation of bananas in the north. 2. Key cultivation techniques (1) Colonization of seedlings: In northern greenhouses, bananas can be grown all year round as long as the temperature is appropriate. The planting size can be 2.02.5 meters, and about 130 acres can be planted. The planting hole is 80 to 100 cm long and 40 cm deep. Apply 5 to 10 kg of organic fertilizer per hole, 100 grams of ternary compound fertilizer, mix the organic fertilizer, compound fertilizer, and topsoil thoroughly, and fill in the lower half of the planting hole for nutrient soil. The top half is backfilled with topsoil to avoid burning seedlings. The banana seedlings should be planted shallowly and the rooting water should be penetrated after planting. (2) Water and Fertilizer Management: The annual growth of bananas requires sufficient nutrients and water supply. Each year, the amount of fertilizer applied to each banana is about 500 grams of nitrogen, 150 grams of phosphorus, and 750 grams of potassium. When the temperature is high and the growth is fast, apply more fertilizing material; if the temperature is low and growth is slow, apply less. During the general seedling period, fertilize 2 times per month, each time, 50-100g of high-nitrogen ternary compound fertilizer is applied per plant; Fertility is applied once per month during the vigorous growth period; 3 to 5kg of organic fertilizer or high-potassium ternary compound fertilizer is applied 250 Grams; to apply flower bud differentiation fertilizer about 60 days before the buds, accounting for about 40% of the total amount of fertilizer. In addition, we must pay attention to the rapid growth phase of calcium, magnesium and other elements added. Bananas need more water during the whole growth period, and need to keep the soil moist during the whole growth period. There are slight differences in different periods, ie seedling run, medium wet, and late run. (3) Flower and fruit management: Bananas can be flowered all year round, and they should be inspected at any time during budding, and the leaves that block sagging of the ear of banana should be promptly removed to prevent the occurrence of deformed fruit combs or scratches. When the banana buds reach the last comb of female flowers only 5 to 8, it is necessary to select sunny noon to break the buds and sterilize the cut off point. Remove unused suckers and concentrate nutrients to supply bananas. (4) Temperature management: The suitable growth temperature of banana is about 27°C. When the temperature is higher than 38°C or lower than 14°C, the growth will stop, and freezing damage will occur below 10°C. Therefore, when the temperature reaches 35°C in the summer, water curtains and fans are used to reduce the temperature, and in the winter, it is necessary to increase the temperature to ensure that the temperature in the greenhouse reaches 15°C or higher. Isolation clothes, also known as clean work clothes, clean work clothes, purification clothes, dust-free clothes, sterile clothes, anti-static work clothes, dust-free work clothes, work clothes, protective clothes, etc. Disposable Isolation Clothing,Disposable Isolation Gown,Disposable Medical Isolation Gown,Disposable Hospital Isolation Gown Guangzhou Aikangli Medical Technology Co., Ltd. , https://www.aikanli.com
In addition to the fact that clothing itself cannot be a source of dust emission, it also has the effect of preventing dust from being emitted by the human body. At the same time, as a sterile clothing, it should have basic properties such as safety protection, comfort, ease of operation, aesthetics, etc. in materials and design. Otherwise, due to the different styles, fabrics and sterile underwear of the work clothes, it directly affects the number of dust and colonies in the clean room.
Widely used in electronic, pharmaceutical, food, biological engineering, optics, aerospace, aviation, color tube, semiconductor, precision machinery, plastics, paint spray, hospitals, environmental protection and other industry clean workshops, there are a variety of colors and specifications suitable for different anti-static Or clean environment.
* Performance editing
100% high-density polyethylene material, one-piece hooded design, breathable and moisture-permeable, can block the penetration of fine dust and liquids, and at the same time allow water vapor to permeate; light and tough, prevent the accumulation of static electricity, it does not produce dust , Free of silicon.
It is made of special polyester filament, warp or warp and weft inlaid with Japanese bell spinning 9R series conductive fiber, and manufactured by a special process. Has excellent, long-lasting conductivity. It is a necessary measure for anti-static of personnel clothing.
The charge of work clothes: <0.6 micro library / piece. Charge area density: <7 microbanks / square meter.
(Annotation of "micro-coulomb": "coulomb" is a unit of charge measurement, 1 coulomb = 1000 milli-coulomb = 1,000,000 micro-coulomb. 6.25 × 108 electrons carry 1 coulomb, and the power of one electron belt is 1.6 × 10 19 coulombs).
* Fabric editing
The fabrics used are: fabrics containing conductive silk, gabardine, yarn cards, TYVEK (acid and alkali resistance), etc.
Conventional optional fabrics: 5mm strip type, 5mm mesh, 2.5mm mesh fabric conductive silk, its anti-dust and anti-static effect is getting stronger and stronger in order; this is also selected according to the clean room level, generally CLASS10000 The clean room below (ten thousand area) should use 5mm strip conductive silk, CLASS1000 (thousand level area) and 5mm grid should be used; CLASS100 (100 level area) clean room should use 2.5mm grid fabric conductive silk.
Isolation clothing fabric-like characteristics
1. Japanese original parallel wire processing technology, with excellent anti-static performance, is permanent and can effectively discharge human body electrostatic charge;
2. The clothing itself is not dusty, non-sticky, has good barrier properties, high density, high strength, can effectively sterilize, and inhibit bacteria
3. Good washing resistance, bending resistance, abrasion resistance, etc., washing resistance ≥100 times, high temperature steam temperature: 120 ℃;
4. All-over-seaming process of special equipment imported from Japan, one-time forming, good dust resistance, can be used in 10-10 thousand grade clean room;
5. Especially recommend the production and sales of breathable anti-static clean clothes.
* Advantage edit
1. The fabric itself does not produce dust: because it is worn in a clean room, the fabric must not be a source of dust in the clean room, which determines that ultra-clean fabrics can only be produced with chemically synthesized long fibers. Natural short fibers such as cotton, hemp, and silk cannot be applied to ultra-clean fabrics, although these raw materials can make the fabrics more wearable. At the same time, it is required that the selected chemical fiber filaments also strictly control the amount of dust generated. Generally speaking, fully matt polyester filament is not suitable for weaving anti-static ultra-clean fabrics. Because the matting agent added in the production of polyester-titanium dioxide will become a source of pollution.
2. The fabric should have good dust filter: the dust in the clean room mainly comes from the air flowing in the room and the human body moving in the room. When the equipment conditions are determined, improving the cleanliness means that the fine dust generated by the human body should be controlled in the clothes to the maximum, and let it pass through the fabric and enter the air. This is the so-called fabric filter rate is higher. Increasing the dust filtration rate is at the expense of the breathability of the fabric, so knitted fabrics and woven fabrics that are more loosely woven are not suitable for clean rooms.
* Edit specifications
The fabrics used are: fabrics containing conductive silk, gabardine, yarn cards, TYVEK (acid and alkali resistance), etc.
Conventional optional fabrics: 5mm strip type, 5mm mesh, 2.5mm mesh fabric conductive silk, its anti-dust and anti-static effect is getting stronger and stronger in order; this is also selected according to the clean room level, generally CLASS10000 The clean room below (ten thousand area) should use 5mm strip conductive silk, CLASS1000 (thousand level area) and 5mm grid should be used; CLASS100 (100 level area) clean room should use 2.5mm grid fabric conductive silk.