As the weather turned cold, the amount of vegetables in the arched shed gradually decreased in the later stage of the results. It is particularly important to improve the thermal insulation of the arch shed and extend the time to market for vegetables.
However, the setting of multi-membrane vegetables for autumn stubble sheds is different from that of spring stubble, because most of the autumn stubble vegetables have reached the late stage of growth, the plants are tall, and the restrictions on vegetables are greater when setting the film.
Grasp the film setting time and the number of covering layers Generally speaking, when the minimum external temperature drops to 8 ° C, two films should be set to enhance heat preservation.
If the temperature drops too fast, we should take advantage of the convenient conditions and add three membranes on the hanging wire.
When the minimum temperature in the shed drops to 10 ° C, a layer of film can be placed on the hanging steel wire to improve the thermal insulation.
As the temperature continues to drop and vegetable growth stagnates, vegetable farmers can untie all the hanging ropes, bring the plants close together, and then directly cover the plants with a film to ensure that the existing vegetables on the plants are not damaged by freezing. Extend the storage time and sell more. Good price.
The second film and the third film not only require better light transmission, but also have better anti-fog and dripping properties, so as to avoid the opposite effect caused by dripping water and fog. For example, the second film can be 20-30 cm away from the lower end of the shed film. Use poles to set up bamboo poles and wire according to the arc of the shed. Then set the film on the bamboo pole and wire. The bottom ends of the two sides should be covered with soil. Left and right, tightly sealed with iron clips. The third film is below the second film, and its installation measures can be the same as the second film, but it should be noted that the distance from the second film can be appropriately increased.
For arched sheds such as Artemisia annua, the setting of two films and three films can be the same as that of spring stubble vegetables. The four-membrane small arch shed can be seen from the width of the rafters, and the appropriate arch is selected to support the small arch shed.
Multi-film covering, pay attention to heat preservation and dehumidification insulation: fire insulation and wind screens around the arch shed.
The method of raising fire in the shed is simple. You can bundle the waste bamboo rods with a length of 3-5 meters into a bundle, and place a bundle at an interval of 5-10 meters. You can ignite from one end of the bamboo rod at about 2 am, or directly use sawdust briquettes, and the burning time is about 1- In 2 hours, the temperature in the shed can be increased by 3-5 ° C to prevent the vegetables from being frozen.
Although the fire in the shed can increase the temperature in the shed, it is close to the area around the arch shed because the heat is quickly dissipated, and the vegetables are still prone to freezing at night when the temperature is relatively low. Therefore, vegetable farmers should also pay attention to strengthening the insulation around the arch shed, and a layer of wind film or straw curtain can be set around the arch shed to improve the insulation of the arch shed.
Dehumidification: When the temperature in the shed reaches 25 ° C when the weather is fine in the daytime, the second membrane in the shed should be opened in time for ventilation, but the width of the ventilation opening should not exceed 15 cm; when the temperature in the shed reaches 28 ° C, Vegetable farmers can open the ventilation openings on the top of the arch shed to ventilate the moisture in the shed. Generally, the air vent can be closed from 11 am to 2 pm.
On cloudy days and other bad weather, the vegetable farmer can only open the ventilation openings of the second film at noon to exhaust the moisture in the shed to the space between the second film and the film, and reduce the humidity of the air under the second film.
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Radial Artery Compression Devices
Radial artery compression devices, also known as radial artery compression devices or wristbands, are used to achieve hemostasis after a transradial cardiac catheterization procedure. The device is applied to the wrist and inflated to compress the radial artery, which is the artery that supplies blood to the hand and fingers. This compression helps to prevent bleeding and hematoma formation at the site of the catheterization.
Radial artery compression devices are preferred over traditional compression methods such as manual compression because they are more effective, comfortable for the patient, and allow for earlier ambulation and discharge. They also reduce the risk of complications such as radial artery occlusion and nerve injury.
In addition to cardiac catheterization procedures, radial artery compression devices may also be used after other procedures that involve the radial artery, such as transradial access for arterial blood gas analysis or for the placement of intra-arterial lines.
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