Variety Selection Papaya varieties suitable for planting in the northern greenhouse include Hung Hom, Tai Nong No. 1, Tai Nong No. 2, Hawaii and Hongri. Among them, Hongri and Hawaii are small fruit varieties with an average fruit weight of 500-600 grams, and the other three varieties are larger.

Planting conditions Papaya is an erect growing fruit tree, requiring a greenhouse height of not less than 3 meters. Papaya hi light, lack of light easily lead to plant leggy, falling fruit, Beijing suburbs sunlight greenhouses can basically meet the requirements of papaya lighting, but modern multi-span greenhouses need to choose a higher transmittance of the ceiling.

The cultivation techniques first dig a planting hole, and then prepare and backfill the nutritious soil. The planting hole is 80 cm in diameter and 40 cm deep. The nutrient soil can be formulated according to the ratio of peat:organic fertilizer:sand:top soil=2:1:1:6. The nutrient soil backfilled with the good planting hole is 20 cm above the ground and is fully irrigated and is ready for planting.

Transplanting seedlings in the Beijing area - generally in the middle and late April. Choose healthy and disease-free seedlings. When planting, seedlings with soil will be gently put into the hole, compacted with soil, and water shall be poured on the roots. Plant spacing 2 meters, row spacing 2 to 3 meters, fertility of the soil spacing can be appropriately wider.

Water and Fertilizer Management Papaya starts 10 to 15 days after planting. It is best to apply decomposed manure and apply once every 7 days for 2 consecutive times. NPK can be used later (15:15:15) compound fertilizer and urea alternately applied every 15 to 20 days topdressing 1 time, each time per plant 50 ~ l00 grams, according to the seedling size control the amount. After budding, it is necessary to spray 0.3% potassium dihydrogen phosphate and 0.2% boric acid.

Flower and fruit management Early removal of lateral buds, timely sparse pollination, incomplete shape, pests and diseases and over-tight fruiting, must be carried out on a sunny day.

Temperature control Papaya growth temperature is 26 °C ~ 32 °C, the minimum temperature in winter can not be less than 15 °C, the maximum temperature in summer can not be higher than 38 °C, the northern greenhouse in winter need to warm, from April to September is fully exposed natural growth .

Humidity management Papaya grows to a suitable air humidity of 60% to 70%. In the winter, it is necessary to ventilate and dehumidify; in the summer, the humidity of the air can be increased by increasing the humidity on the ground or spraying.

The main pests for pest control were Starscream, which peaked from August to November. It was found that in the early stage of spider mites, water sprayed 3 to 4 times, reducing the population of insects, using colloidal sulfur suspension 250 times at the peak, and every other time during the larval incubation period. 5 to 7 days spray 1, even spray 2 or 3 times. Diseases mainly include ring spot mosaic disease and powdery mildew. Ring spot mosaic disease is mainly prevention. It is to strengthen management and enhance the disease resistance of plants. Second, it is timely excavated after the diseased plants are found. Powdery mildew is mainly susceptible to disease at low temperature and humidity. Therefore, attention should be paid to ventilation and light transmission. In the early stage of disease, 250 times of colloidal sulfur or 0.2-0.3 Baume degree lime sulfur can be used for prevention and treatment.

Surgical gowns, as necessary protective clothing during the surgery, are used to reduce the risk of medical personnel coming into contact with pathogenic microorganisms, and can also reduce the risk of pathogenic microorganisms spreading between medical staff and patients. It is a safety barrier for sterile areas during surgical operations .
* Scope of use of surgical gowns: can be used for surgical operations, treatment of patients; anti-epidemic inspection in public places; disinfection in virus-contaminated areas; can also be widely used in military, medical, chemical, environmental protection, transportation, epidemic prevention and other fields.
* Classification of Surgical Gown
1. Cotton surgical gown. Medical institutions are the most widely used and most dependent surgical gowns. Although they have good breathability, they have poor barrier protection. The cotton material is prone to shedding of flocs, so that the annual maintenance cost of the ventilation equipment of the hospital will also have a large burden.
2. High density polyester fiber fabric. This type of fabric is mainly composed of polyester fiber, and conductive materials are embedded on the surface of the fabric, so that the fabric has a certain antistatic effect, thereby improving the comfort of the wearer. This kind of fabric has certain hydrophobicity, it is not easy to produce cotton de-flocking and the advantages of high reuse rate. This kind of fabric has good antibacterial effect.
3. PE (polyethylene), TPU (thermoplastic polyurethane elastic rubber), PTFE (teflon) multi-layer laminating film composite surgical gown. The surgical gown has excellent protection performance and comfortable breathability, which can effectively block the penetration of blood, bacteria and even viruses. But the popularity in China is not very wide.
4. (PP) polypropylene spunbond fabric. Compared with the traditional cotton surgical gown, the appearance of this material is because of its low price, and has certain advantages such as antibacterial and antistatic, so it can be used as a material for Disposable Surgical Gowns, but the ability of this material to resist hydrostatic pressure is relatively Low, and the blocking effect of the virus is relatively poor, so it can only be used as a sterile surgical gown.
5. Water spur cloth composed of polyester fiber and wood pulp. Generally only used as a material for disposable surgical gowns.
6. Polypropylene spunbond-meltblown-spun. Adhesive composite non-woven fabric (ie SMS or SMMS): This material is a high-quality product of a new type of composite material. Hydrostatic pressure capacity. SMS non-woven fabrics are widely used at home and abroad, often used to make high-grade surgical gowns.
* Structural design of surgical gown
New protective surgical gown
By providing a protective collar, the neck of the operator can be kept warm. By setting a hand guard pocket, it is helpful for the operating staff to temporarily put their hands in the hand guard pocket while waiting during the operation, which plays a protective role, and is more in line with the principles of aseptic operation and occupational protection.
By setting the contraction cuff, it is helpful to fit the cuff to the wrist, prevent the cuff from loosening, and prevent the glove from slipping out during the operation, which may expose the operator's hand to the glove.
The design of the new humanized protective surgical gown has been improved in the key areas of the surgical gown. The two areas of the forearm and chest area are double thickened, and there are hand pockets in front of the chest and abdomen. By setting reinforcement tablets (double-layer structure) in key areas, it is helpful to improve the ability of surgical gowns to resist water permeability and improve safety.
* Performance of surgical gown
The performance of surgical gown mainly includes: barrier performance, comfort performance.
1. Barrier performance mainly refers to the protective performance of surgical gowns. Its evaluation methods mainly include hydrostatic pressure, water test, impact penetration, spraying, blood penetration, microorganism penetration and particle filtration efficiency.
2. Comfortable properties include: breathability, water vapor permeability, drape, quality, surface thickness, electrostatic properties, color, reflectivity, odor and skin sensitization, and the effects of design and sewing in garment processing. The main evaluation indicators are air permeability, moisture permeability and charge density.
* Why is the surgical gown green?
In the operating room, if doctors, nurses and other staff wear white coats, because the doctors always see bright red blood stains during the surgery, for a long time, occasionally turning their attention to the companion's white coat You will see spots of "green blood stains", which will confuse vision and affect the surgical effect. The use of light green fabric for surgical gowns can not only eliminate this green illusion due to visual complementary colors, but also reduce the fatigue of the doctor's optic nerve, thereby ensuring the smooth operation of the operation.

Surgical Gown

Surgical Gown,Surgical Protection Gown,Surgical Protection Clothing,Non Woven Isolation Gown

Guangzhou Aikangli Medical Technology Co., Ltd. , https://www.aikanli.com