The energy consumption is slightly higher. Therefore, the multi-span greenhouse in the northern region needs to do a good job of heat preservation. Carry out R & D and design in thermal insulation. How to build a three-span greenhouse before determining the use of the multi-span greenhouse for the project, we should first consider the orientation of our region, the climate characteristics, the use of the glass greenhouse. For example, in the glass greenhouse for planting and seedling raising in the northern region, the important work is to maximize the thermal insulation performance of the greenhouse under load. We can add an internal thermal insulation system on the top floor of the greenhouse. The glass around the greenhouse should use double-layer hollow glass as much as possible, and for example, to build a glass greenhouse in the northwest, such as electric sunshade system, electric ventilation system and so on. By adding terminal equipment of the Internet of things, this kind of multi-span greenhouse can automatically start and stop the greenhouse equipment by issuing data acquisition and analysis instructions.
According to the management of medium-and long-term weather forecast, in case of continuous low temperature, the temperature of the mushroom house / shed should be kept above 8 °C ~ 10 °C. The main measures for heat preservation and warming include: thickening the roof cover at night; hanging blankets on doors; closing doors and windows for heat preservation in the morning and evening; opening doors and windows around noon in sunny days; opening only leeward vents for short-term ventilation in rainy and snowy weather; in cold or windy weather, close doors, windows and vents to prevent cold air from attacking. When the weather is fine, open the cover to increase the temperature of the light, when the light is strong, it is best to set up a sunshade net under the greenhouse film and above the bacterial stick to protect the light and heat. If there are heating facilities such as hot air stove, the temperature of the mushroom room / shed can be increased by heating, but attention should be paid to prevent the smoke from being discharged into the shed and cause poisoning. In addition, the ditch cleaning and drainage of the mushroom shed should also be done to reduce the humidity in the greenhouse in the rainy season and improve the mushroom quality.
Through configuration comparison, it can be seen that the new A6L entry version has added 10 configurations, such as active braking system, matrix LED headlights, inch full liquid crystal meter, inch central control screen, leather dashboard, touch reading light and 12V power supply in the trunk. However, the new car also reduces the four configurations of rear side airbags, rear windshield shade, rear window sunshade and regional air conditioning. On the whole, the 10 additional configurations are better for low-equipped models to enhance the sense of luxury and technology atmosphere, and the reduced configuration can also be made up for by optional equipment.
Although, there are some minor complaints in the process. “before the introduction of the policy, I saw someone cooking hot pot on the lawn, hurting the grass. When they left, they also left some rubbish. ” Ms. Mak, a citizen, said. In view of this situation, according to the person in charge of the Yuntai Garden Management Center of Baiyunshan Scenic spot, the tent area of the park will be in charge of a fixed area, a fixed period of time and a special person. At present, two large lawns in Yuntai Garden are open for citizens to set up tents from 10:00 to 4 pm on weekends and holidays. Members of the public can set up tents and picnics. The garden will also provide sunshade facilities and designate garbage dumping areas. Kites and fire are prohibited on the lawn.
This kind of agricultural film usually results in poor light conditions in the greenhouse, and the temperature is relatively low and the humidity is relatively high, which aggravates the diseases and insect pests to some extent. The heat preservation performance of agricultural film is poor, especially the noon temperature in summer and autumn is easy to be too high, so it is necessary to do a good job of cooling: suitable for feeding wet leaves. It is easy to cause mulberry leaf withering after high temperature and ventilation in the shed. Wet leaves can be fed at noon on a sunny day and air spray with effective chlorine concentration bleaching solution is used to replenish moisture and prevent disease. Increase ventilation. After sunrise on a sunny day, open the film on both sides of the greenhouse for ventilation, and put down the film on both sides to keep warm when the temperature in the shed drops below the suitable temperature for feeding in the evening. When the temperature is high, ventilate day and night. Put down the sunshade net on both sides of the greenhouse on rainy days and lift the film on both sides of the greenhouse to facilitate ventilation.
Tents are necessary ritual items for picnics, and it is critical to take children out with sunscreen. Tents can act as sunshades and allow children to take a nap inside, mainly because no child does not like tents.
Another growth factor related to humidity is light. Blueberries are not particularly strong for it, but moderate light is needed to ensure growth. Generally speaking, a sunshade net should be used to isolate part of the exposure when the sun is strong, so as to ensure that the temperature in the blueberry shed should not be higher than 26 degrees. Especially when the summer temperature is particularly high, you can cover two layers of sunshade net on the surface, otherwise the high temperature will make blueberries stop growing. The sunshade net can be removed when the temperature drops in the evening, and if the temperature is too low, the thermal insulation film on both sides of the shed needs to be put down to increase the temperature in the shed. But leave some holes in the perimeter to strengthen an internal air flow. When the weather is bad, one should pay attention to the heat preservation work, and the other is the drainage work.
