One fully open skylight polypropylene greenhouse for producing leafy vegetables is completed at YunNan,South China , with an area of 20000 square meters.
1. Structure of the fully open skylight polypropylene greenhouse: The structure is similar to the Venlo type.
2. Features of the fully open skylight plastic polytunnel greenhouse With the gutter eaves as the fulcrum, the skylight can be opened from the ridge, and the opening degree can reach the vertical level. The strong plastic greenhouse side windows are opened by pushing and pulling up and down. When fully opened, the indoor and outdoor temperatures can be kept consistent. The fully open skylight polypropylene greenhouse is convenient to receive rainwater in summer and prevent the accumulation of soil salts. The windows can be automatically closed through computer intelligent control according to the indoor temperature, precipitation and wind speed.
The fully open skylight film greenhouse is a very suitable design for producing leafy vegetables, especially when the climate conditions are more changeable or the strong plastic greenhouse environment needs to be adjusted frequently. Plastic polytunnel greenhouse is usually covered with lightweight plastic film, which makes them more economical and easier to install than traditional glass greenhouses. Here are some advantages and design considerations of this type of polypropylene greenhouse for producing leafy vegetables:
1. Ventilation advantages of fully open skylights
The fully open skylight design allows free air circulation at the top of the polypropylene greenhouse, which is essential for the growth of leafy vegetables. Leafy vegetables are usually more sensitive to air humidity. Good ventilation can effectively prevent moisture accumulation and reduce the risk of mold, fungus and pests.
Improve air circulation: Skylights can adjust the air circulation in the polypropylene greenhouse by opening and closing, allowing fresh air to enter, preventing carbon dioxide accumulation, and helping to regulate temperature and humidity.
Avoid high temperature accumulation: In summer or when the strong plastic greenhouse is overheated, skylights can effectively exhaust hot air, keep the temperature in the plastic polytunnel greenhouse stable, and prevent leafy vegetables from being stressed by high temperatures.
2. Advantages of film materials
The plastic film used in strong plastic greenhouse is usually made of materials such as polyethylene (PE) or polypropylene (PP), and has the following advantages:
Good light transmittance: The film can provide enough sunlight to promote the photosynthesis of leafy vegetables in the plastic polytunnel greenhouse. Films of different thicknesses and types can be selected according to specific lighting requirements.
Low cost: The construction cost of plastic polytunnel greenhouse is relatively low, which is ideal for large-scale production of leafy vegetables, especially for agricultural projects with tight budgets.
Lightweight and easy to install: The film is lighter than glass, strong plastic greenhouse is easy to install and maintain, and not easily broken or damaged by wind, and has strong weather resistance.
3. Temperature and humidity control
The temperature and humidity control of strong plastic greenhouse is much more delicate than conventional open planting:
Temperature regulation: Plastic polytunnel greenhouse can keep the interior warm in colder seasons, and reduce the temperature in the greenhouse through skylights and proper ventilation in warm seasons.
Humidity regulation: High humidity is a must for leafy vegetables. The plastic polytunnel greenhouse can be equipped with an automatic drip irrigation system to keep the soil moist while using the skylight design to drain moisture and avoid excessive humidity in the greenhouse.
4. Irrigation and water management
Strong plastic greenhouse is usually equipped with efficient irrigation systems (such as drip irrigation or sprinkler irrigation) that can accurately deliver water to the roots of plants to avoid evaporation and waste. Regulating the amount of water in the greenhouse can ensure that leafy vegetables have an ideal growing environment.
Drip irrigation system: This is a water-saving irrigation method that can deliver water directly to the roots of plants to avoid wetting the leaves and reduce diseases caused by excessive humidity in leafy vegetables.
5. Pest and disease control
Although fully open skylights can provide good ventilation, it is also necessary to pay attention to the prevention and control of pests and diseases. Regularly checking the health of vegetables and dealing with pests and diseases in a timely manner can reduce the impact on yield and quality.
6. Improve yield and quality
Environmental control in the strong plastic greenhouse allows leafy vegetables to grow under more ideal conditions, thereby improving yield and quality. Through reasonable light, temperature and humidity management, problems such as slow growth or poor quality of vegetables can be avoided.
Suitable leafy vegetables:
Lettuce: requires a cooler temperature and higher humidity environment, which plastic polytunnel greenhouse can effectively provide.
Spinach: It is highly adaptable, but is sensitive to overheating and high humidity. Good ventilation design can ensure its growth.
Cabbage and Chinese cabbage: These leafy vegetables have high temperature requirements. plastic polytunnel greenhouse can regulate temperature and humidity to promote their rapid growth.
Design and management suggestions:
Skylight automation control: Consider polypropylene greenhouse installing an automatic switch system to automatically adjust the opening and closing of the skylight according to changes in temperature and humidity, reduce manual intervention, and improve management efficiency.
Shading system: In summer, appropriate shading equipment (such as shading nets) can reduce excessive light in the strong plastic greenhouse and prevent high temperatures from affecting the growth of vegetables.
Soil management: The soil in the strong plastic greenhouse needs to be replaced and supplemented with fertilizers regularly to ensure that the plants can get enough nutrients.
Regular cleaning: Cleaning and maintenance of polypropylene greenhouse are very important to ensure that there is no dust or pollutants, which helps to increase light in the greenhouse and maintain good ventilation.
Summary:
The fully open skylight polypropylene greenhouse provides an ideal environment for the production of leafy vegetables. It can effectively regulate temperature, humidity and light, avoid pests and diseases and excessive moisture, and improve yield and quality. Its affordability, ease of installation and adjustability make it ideal for small to medium-sized vegetable cultivation.
