1. Refers to a kind of planting technique that all the nutrients needed for the normal growth of plants are scientifically and reasonably formulated into nutrient solution according to the proportion and quantity of plant growth, so that the roots absorb nutrients in the nutrient solution.
Second, the advantage of leafy soilless hydroponics
1. Good product quality
The leafy leaves of leafy edible plants, such as lettuce and lettuce, are mainly raw food, which requires fresh, clean and non-polluting products. Shi Pei vegetables are easily polluted by the environment, causing heavy metals to exceed the standard, and the pesticide content exceeds the standard, while the hydroponic leafy vegetables are better than the soil cultured leaves, clean, fresh, good taste and high quality.
2. Adapt to market demand for annual cultivation at the same site
Leafy vegetables are not easy to store, but in order to meet market demand, annual production is required. The cultivation of soil-cultivated leafy vegetables is cumbersome, and it requires land preparation, planting, fertilization, watering, etc., and soilless cultivation is very simple, just seed the seedlings into the planting holes, such as lettuce, 365 days a year. Can be planted, planted, harvested. Continuous production without interruption. Therefore, the hydroponic method is convenient for gargle arrangement and is suitable for planning and contract production.
3. Solve the good production mode of vegetable off-season supply
The leafy plants are generally short, and there is no need to increase the support facilities. Therefore, the facility investment is less than that of fruit and vegetables. Hydroponic vegetables have a short growth cycle and a fast turnover. The hydroponic method is also a facility production and is generally not easily damaged by typhoons. Farmers who supply fresh vegetables during the typhoon season in coastal areas often receive higher profits.
4. High economic efficiency
Hydroponic leafy vegetables can avoid continuous damage, and the multiple cropping index is high. The operating rate of the facility is as high as 20茬 per year, and the production economy is high. For this reason, leafy vegetables are usually carried out by hydroponics.
3. Leafy varieties suitable for soilless hydroponic culture
Most leafy vegetables can be hydroponically. The more common varieties are: lettuce, spinach, cress, kale, cabbage, rape, cabbage, kale, purple-backed sunflower. Among them, lettuce is one of the most important and most common hydroponic vegetable vegetables.
Fourth, the core technology of hydroponic vegetables
The preparation of nutrient solution is the core technology for the normal growth of hydroponic vegetables. It is also the basis and key to soilless cultivation. According to the demand for nutrients in plant growth, a solution prepared by dissolving a certain amount of fertilizer in water in an appropriate ratio is called a nutrient solution. The success of hydroponics depends to a large extent on the formulation of the nutrient solution, the concentration, the proportion of various nutrients, the pH, the liquid temperature, and whether the nutrient solution management during plant growth can meet different growth stages. Claim. Only by adopting the correct formula and formulating and managing the nutrient solution according to the appropriate method, so that the plant can be used in the most suitable nutrient solution environment at any time of growth and development, the plant can use more energy for growth, flowering and fruiting. Get fast, high-yield, high-quality cultivation results.
Only by thoroughly understanding the composition principle of nutrient solution, the changing rules of nutrient solution and the control methods can we truly grasp the essence of hydroponic culture. The configuration and management of nutrient solution is by no means a simple matter of mechanically taking the existing formula and dissolving several fertilizers in the water. Because different water quality, cultivation methods, climatic conditions, and cultivation period have a great influence on the preparation and use of nutrient solution. Only when the nutrient solution is properly and flexibly formulated and used, and the practice is carried out in order to achieve cultivation success.
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