Greenhouse tomato, radish, lettuce, melon three-dimensional cultivation techniques

In the greenhouse, tomato seedlings were started on a cold bench in mid-November. The seeds were sown and then transplanted when they had two true leaves. To manage excessive growth, paclobutrazol at 20 mg per liter was applied 2-3 times, helping to control the spread of pests. Disease management involved rotating between Ledomil, Chlorothalonil, and Carbendazim. By mid-January, the plants had buds and were ready for transplanting. During site preparation, 6,000 kg of organic manure or 75 kg of chicken manure was applied per mu, along with 25 kg of compound fertilizer. The greenhouse structure was built with a 6-meter width, featuring 4 feet in height. The surface area was 90 cm wide, with 30 cm wide furrows and 40 cm wide side areas. At the end of January, the tomatoes were planted in the center of four pods, with two rows per pod, spaced 25 cm apart within the row and 50 cm between rows. Each plant was pruned using a single stake, and flowers were preserved using sit Guohua. Spraying was done between 7-9 am on sunny days and 10 am to 2 pm on cloudy days, with regular thinning of fruits to leave 3 clusters per plant, each with 2-3 fruits. Gray mold was controlled comprehensively using Keling. Water was filled into the furrows during dry periods, combined with top-dressing. By late February, radish seeds were broadcasted on both sides of the greenhouse in single rows, spaced 35 cm apart. They were marketed at the beginning of May, treated with imidacloprid and covered with quail nets. Lettuce was grown in early February under a small shed, with seedlings aged 40 days. In mid-March, it was planted on both sides of the tomato beds, with one row per side and 25 cm spacing. Downy mildew was prevented using Metalaxyl and Chlorothalonil, and lettuce was harvested in mid-May. In late April, melon seedlings were started. By late May, seedlings with three leaves and one heart were interplanted between the first and second, third and fourth ditches, with 40 cm spacing. When the seedlings reached four leaves and one heart, the central shoot was removed, and the plant was trained to grow three vines. Tomatoes were harvested by late June, and vines were guided onto trellises. During fruit expansion, 10 kg of urea was applied as a top dressing. Pests such as melon flies were controlled using Dichlorvos and insecticides, while aphids were managed with imidacloprid and earthworms. Viral diseases were prevented using anti-virus agents and Metalaxyl.

PC Board Venlo Greenhouse

Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.

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