How to manage trade credit risks

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• How to control the temperature and humidity of greenhouse seedlings
• 4, bigHow to control the humidity of the shed

How to realize the automatic control of the temperature and humidity of the greenhouse

1. On-site monitoring components: including temperature monitoring, humidity monitoring, CO2 concentration and other monitoring elements Piece. These devices are equivalent to the eyes of the entire control system, monitoring the condition of the greenhouse in real time for control. 2 Execution structure: such as various pumps, heaters, CO2 generators, lighting control devices and other actuators.

2. When the temperature and humidity of the greenhouse exceeds or is lower than the set standard value, the data is automatically fed back to the intelligent monitoring system. The system immediately controls the opening or closing of the film roller, and automatically takes measures such as greenhouse ventilation, cooling or keeping warm, so that the greenhouse always maintains the most suitable temperature and humidity for vegetable growth.

3. General daylight greenhouses only rely on sunlight radiation to raise the temperature and rely on plastic film to collect heat. Temperature regulation can be done by adjusting the amount of incoming sunlight and ventilation. In the weather without sunshine, it should be covered with grass to keep warm. Some also use coal-fired heating.

What conditions does the control system required for intelligent greenhouses meet? What does it include?

1. The control of intelligent greenhouses is generally composed of three major parts: signal acquisition system, central computer and control system.

2. The equipment required for intelligent greenhouses should be based on traditional greenhouses, plus air temperature and humidity sensors, soil PH sensors, soil temperature and humidity sensors, illuminance sensors, carbon dioxide sensors, current sensors and other sensing equipment, as well as cameras, intelligent control cabinets, remote Program controls the Internet of Things cloud platform and other parts.

3. Factors such as temperature, humidity, light intensity and soil temperature and water content in greenhouses play a key role in the growth of crops in greenhouses.

4. The system of intelligent terraced greenhouse: - Required system: foundation, concrete foundation, general four-sided strip foundation, midpoint foundation. The skeleton is usually a hot-dip galvanized skeleton, and there are also anti-rust paint. Covering materials, the commonly used materials are film, sunlight plate and glass.

5. Its function is to humanely control the environmental conditions of crop growth with advanced technology and modern facilities, so that crop growth is not affected by natural climate, so as to achieve year-round factoryization and carry out high efficiency, high output value and high-efficiency production.

6. The part of the construction of greenhouse system installation refers to the installation of mobile seedbeds, planting brackets, planting troughs, matrix bags, power distribution installation, etc., as well as the installation and debugging of hardware equipment related to the intelligent greenhouse control system.

How to control the temperature and humidity of seedlings in greenhouses

1. Wet curtain method, wet curtain can not only reduce the temperature in the greenhouse, but also play a significant role in raising humidity. Spray irrigation, which uses spray irrigation to increase the humidity of soil or air, is a commonly used humidification method. Maintain a certain degree of closure, so that the indoor air circulation is not too fast, and the humidity in the greenhouse can be maintained.

2. In the early stage of production in spring, loose soil and ground film coating can reduce the humidity of the greenhouse. To reduce the humidity of the greenhouse, the method of raising the temperature of the closed greenhouse should also be adopted in early spring, and in summer, the method of releasing air and draining moisture should be the main method.

3. Regularly clean up the water droplets on the shed film and keep the shed film clean and dust-free. Water droplets and dust will affect the light transmittance, which is not conducive to the photosynthesis of vegetables. Only by ensuring sufficient light can the quality of vegetables be improved.Before planting, improve the breathability and water permeability of the soil and increase the fertilizer efficiency through soil disinfection; reduce the occurrence of pests and diseases through soil disinfection.

4. Temperature control: Control the temperature of the shed between 25 and 30 degrees Celsius. When it is too hot, the two ends of the seedling shed should be pulled up for ventilation, and when it is too cold, it should be warmed to keep warm. Fertilization management: After the seedlings grow two or three leaves, high nitrogen fertilizer can be used for the next time.

How to control the humidity of the greenhouse

IV) Reasonable watering: Moisture is the main factor leading to the increase of indoor humidity, so how to water has become an important measure to control humidity. In winter and spring production, you can choose sunny ditch watering or split-plant watering, and mulch cover can be covered with under-film dark irrigation. Watering should strictly control the amount of watering to prevent excessive indoor humidity.

Sprinkle irrigation method, which uses spray irrigation to increase the humidity of the soil or air, is a commonly used method of increasing humidity. Maintain a certain degree of closure, so that the indoor air circulation is not too fast, and the humidity in the greenhouse can be maintained. Using a humidifier is also a good choice.

Ventilation and dehumidification. Ventilation is a good way to reduce humidity. Ventilation must be carried out at high temperatures, otherwise it will cause the indoor temperature to drop. If the temperature drops too fast during ventilation, the vent should be closed in time to prevent the sudden drop in temperature from harming vegetables. Water reasonably. Watering is the main factor leading to the increase in indoor humidity.

Watering should be controlled as much as possible when the temperature in the shed is low, especially when ventilation is not allowed. Generally, it can be watered at 10-2 a.m. on a sunny day, and it can be combined with ventilation and moisture drainage. If possible, sub-membrane groove irrigation or drip irrigation can be used to reduce the amount of irrigation and evaporation.

Therefore, in addition to ventilation, the air humidity in the greenhouse is regulated and controlled, and the soil humidity is mainly regulated by watering. In fact, watering can not only adjust the soil humidity, but also the air humidity, especially when the outside temperature is high and the ventilation volume increases. Special attention should be paid to increasing the soil humidity to avoid soil drought affecting the growth of ginger.

List of the contents of this article:

• 1,How to manage trade credit risks How to realize automatic control of temperature and humidity of greenhouses
• 2, What conditions does the control system required for intelligent greenhouses meet? What does it include?
• 3 、
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