1. Breeding seedlings and planting: Select Sujiao No.5 and picking pepper No.1 varieties to breed and grow seedlings. About 10 days before planting, cover the film of the greenhouse, apply 4,000 kg of composted manure per acre, 150 kg of rapeseed cake, 50 kg of 25% ternary compound fertilizer, and plow after deep plowing, and walk 40 cm wide in the middle of the shed. Road, and then covered with plastic film and closed the greenhouse warming. Planting spacing 50 cm, spacing 40 cm, watering after planting and cover a small shed in the shed.
2, after planting management: pay attention to adjust the temperature and humidity. If the temperature is lower at night, early spring peppers will be planted in early November and planted in the second half of next year. In early May, double-layer films will be placed on small arches. The following collaterals were removed from all the peppers, but the pepper was allowed to grow. After planting a living plant, topdressing and decomposing diluted manure water is applied until the flowering result is no longer top-dressed. The water management keeps the field dry and wet. After the flowering result, the hole is applied once and heavy fertilizer is applied. 25 kg of urea per acre is applied, and immediately thereafter Pour heavy water. Afterwards, treat water as appropriate. Apply 0.4% potassium dihydrogen phosphate + 0.4% urea solution once every 10-15 days.
3. Diseases and pests control: The main diseases of seedling stage are damping-off disease and epidemic disease. After colonization, there are mainly viral diseases, epidemics and anthrax diseases. Control of damping-off disease can be added in seedbed soil and nutrient soil with appropriate amount of carbendazim; viral disease can be controlled with 20% virus A wettable powder 500 times liquid; disease can be controlled with 64% antivirus WP wettable powder 500 times; Anthrax can be controlled with 70% mancozeb WP 600 times. Insect pests mainly include aphids, which can be controlled by 2000 times of 10% imidacloprid wettable powder.
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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