The new technology of soilless cultivation of coriander should control the concentration of nutrient solution.
The first choice for soilless cultivation of coriander is a good planting plot, with sufficient and clean water, sufficient electricity and ventilation to build a greenhouse. Coriander is suitable for sowing and raising seedlings in autumn and winter, because a certain temperature is needed for seed germination. after seedling transplanting, different nutrient concentrations can be determined according to different growth periods to promote photosynthesis, which is beneficial to the ripening of coriander and the increase of chlorophyll. In the later stage, we can mainly control diseases and insect pests.
1. Choose a place to build a shed
Soilless cultivation is mainly based on foam board, and there are special cultivation boards for soilless cultivation on the market, and the cultivation density is reasonably arranged to drill holes on the foam board. The first choice for soilless cultivation of coriander is a place with good planting plots, good drainage and irrigation conditions, sufficient clean water, sufficient electricity and ventilation. After the base is selected, the greenhouse can be built, and it needs to be fully isolated from the outside world. For example, to prevent the invasion of animals, diseases and insects, ground contact places, skylights and greenhouse film.
2. Seedling and sowing
Coriander is generally planted in autumn and winter, and the temperature at this time is beneficial to the sowing and breeding of coriander seeds. If the sowing temperature in summer is too high, it is necessary to go through low temperature to accelerate germination, and the treated seeds should not be sown too deep, because coriander is a double leaf, so it needs to be watered regularly after sowing to maintain enough water, which is beneficial to seed germination. when the seedlings grow leaves, they can spray an appropriate amount of nutrient solution and replenish the necessary nutrients in time. Wait for 4 leaves to grow before transplanting.
3. Control the nutrient concentration.
After transplanting, the seedlings mainly absorb nutrients through the roots. In order to reduce the planting cost, we provide nutrition mainly by recycling. The concentration of the nutrient solution is mainly determined according to the growth of coriander, for example, the nutrient concentration is about 1.1 in the seedling stage, 0.4 in the middle growth stage, and 1.9 in the later growth stage. Strengthening its nutrient absorption is conducive to the maturity of coriander plants. Foliar fertilizer should be applied regularly in the planting process to ensure sufficient light, which is conducive to the increase of chlorophyll.
4. prevention and control of diseases and insect pests
We mainly focus on prevention of diseases and insect pests, first of all, do a good job of external isolation, try not to use pesticides, sterilize with ultraviolet rays when using nutrient solution, disinfect regularly, reduce the number of germs and eggs, reduce the incidence of diseases and insect pests, and so on. Reasonable management can reduce the incidence of diseases and insect pests.
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