Chinese cabbage can be cultivated all year round because of its small plant shape, short growth period, good yield, and simple management. It is one of the vegetable crops that are more suitable for hydroponic cultivation. Hydroponic pakchoi has a short growth cycle, a large multiple cropping index, and high economic efficiency in production; the yield is high and the quality is good, which is 1 to 3 times higher than that of soil cultivation.
Hydroponic cabbage generally does not use pesticides, which can avoid soil infections of diseases and insect pests and the pollution of chemical fertilizers. Its products are fresh and tender, clean and hygienic, good in taste, and high in quality; to meet market demand, it can alleviate the shortage of vegetables in off-season; it can overcome soil continuous cropping obstacles , Production is carried out all year round.
NHF hydroponic device: NFT mode is a better mode for growing leafy vegetables, also called nutrient liquid membrane technology. The thickness of the circulating nutrient solution is less than 2 cm, just like a shallow water film. This way of nutrient solution supply has a more adequate root zone oxygen environment than other deep liquid streams, and the roots of growing vegetables are mostly in moisture.
Only the root system at the bottom can absorb water and nutrients, which can keep the vegetables in a better aerobic environment and maintain the vitality of the roots. It is very suitable for the common Chinese cabbage NFT hydroponic device for the hydroponics of leafy vegetables such as cabbage. The cultivation bed is welded by 20mm×40mm galvanized steel pipe.
The size of the cultivation bed is 1 meter wide, 1.2 meters high and 10 meters long. The design is convenient for manual operation and reduces labor. The upper and lower layers are made of high-density polyethylene foam boards, which are the bottom tank and the planting cover. The bottom tank is wrapped with black plastic film to prevent nutrient solution leakage. The cover of the cultivation tank is designed to evenly distribute the planting holes.
Protrusions around the planting holes make it difficult for debris, such as water, dust, insects, etc., on the board surface to enter the cultivation tank. Seedling raising: select seedling trays for sowing and raising seedlings, and choose the sowing method according to the size of the pakchoi seed. When sowing and raising seedlings, the seedbed should be irrigated and the non-woven fabric should be covered to facilitate moisture retention and emergence of whole seedlings.
The electric heating wire is evenly laid under the seedbed to ensure that the temperature of the seedbed is 25±1℃. The seedbed should be properly moist in the early stage and dry and loose in the middle and late stage. According to the drought condition of the substrate, use a 0.5 mm aperture spray bottle to spray water to protect the seedlings. It is better to spray water in the early layer or in the evening, otherwise it is easy to burn the seedlings.
When the seedlings in the seedling tray grow to 2 leaves and 1 heart stage, they can be planted. Refining seedlings before planting can shorten the slowing time of seedlings, which is conducive to the survival of seedlings. The method is to allow the seedlings to fully receive light before the emergence, gradually reduce the temperature, increase the temperature difference management, and gradually increase the ventilation.
Try not to water during the cultivation period. Take care of the seedlings to protect the roots from damage. First, wash the root matrix of the seedlings in clean water, and then disinfect with 50% carbendazim 500 times solution. Fix the rhizome of the seedling with a sterile sponge block of appropriate size and plant it in the planting hole to ensure that the root system is in contact with the nutrient solution film.
