It is very popular now for soilless cultivation. Its nutrient solution is easy to control and easy to manage. It is a cultivation method for high yield of strawberries. So, how can greenhouse strawberries be soilless? Polyacrylamide is a kind of high molecular polymer. It is widely used for industry like water treatment, paper, oil, coal, mine, textile, construction, etc.
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Soilless culture is a planting substrate fixed with light materials such as grass charcoal, forest humus soil, vermiculite, etc., allowing the plant roots to directly contact the nutrient solution, and adopting mechanized precision seeding to modernize seedling technology. Its nutrient solution is easy to control and easy to manage. It is a cultivation method for high yield of strawberry. Now its technology is introduced as follows:
First, establish a cultivation trough. The cultivation trough is 20 cm high and 65 cm wide. It is surrounded by red bricks. The working distance between the troughs is 35 cm. One layer of 0.1 mm polyethylene plastic film is completely separated from the soil at the bottom and around the cultivation trough to prevent pests and diseases from spreading. The substrate was thoroughly mixed with 55% ground corn stover, 25% boiler slag, and 20% sawdust.
Second, the fertilizer and water conditions. In the soilless culture production, the crop must have an adequate supply of nutrients. We use the disinfected decomposed chicken manure and bean cake to mix well in a ratio of 2:1. Each cubic meter of cultivation substrate is mixed with about 15 kg as the base fertilizer. Before mixing the homogeneous matrix into the cultivation tank, 1-2 plastic droppers are laid in each cultivation tank, and connected to the outdoor tap water through the branch pipe and the dry pipe, and each greenhouse is provided with an independent control valve.
Third, strawberry variety selection and management measures
1. Test varieties. Choose Fengxiang strawberry, plant it in early September, first plant the strawberry before planting, and wait until the inflorescence is differentiated before planting in the cultivation trough.
2, carefully remove the weak seedlings before planting, seedlings and seedlings, cut off old leaves and stems. Generally, 2 rows are planted in each tank, the plant spacing is about 15 cm, and watering is continued for 2-3 days after planting. The seedlings need to be sprayed with fungicides frequently, such as methyl thiophanate and carbendazim.
3, cut off the old leaves before the shed, each plant retains 3-4 functional leaves, spray 10 mg / liter of gibberellin 1 time, 40% of the plants are sprayed 5 mg / liter, gibberellin 1 time.
4, the solar calendar was carried out at the end of October. After the shed, the indoor temperature is strictly controlled. The old leaves and diseased leaves are often removed. Each plant retains 8-10 functional leaves, and 0.2% potassium dihydrogen phosphate or urea is sprayed once every 10 days. During the flowering and fruit expansion period of strawberry, the available nitrogen, phosphorus and potassium are directly transported to the root of the strawberry through the dropper, and the water and fertilizer are combined.
5. The strawberry flowering period is carried out by artificially assisted pollination and bee laying in the shed to increase the yield and quality of the strawberry.
6. The humidity in the greenhouse is large in winter, and it is prone to strawberry gray mold and brown spot disease. When it occurs, it can spray 50% carbendazim 500 times liquid or 50% quick keling 800 times liquid, or use smoked fungicide. And pay attention to the frequent ventilation in the greenhouse to keep the air fresh.
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