How to do the soilless cultivation of lettuce, lettuce soilless planting method

Soak <> lettuce seeds in clean water for 3-4 hours, drain the water and place them on a clean and moist gauze for germination. Lettuce is suitable for autumn, winter and spring cultivation, sowing germinated seeds into planting cups, sowing 1-2 seeds per cup, then covering with a layer of substrate and watering appropriately. When the seedlings have 6-7 true leaves, the seedlings are planted in the nutrient bowl first, and then the seedlings are filled with vermiculite around the seedlings, and the nutrient solution is regularly watered.

First, the soilless planting method of lettuce

1. Soak the seeds in clean water at about 20 for 3-4 hours, drain the water and put them on clean and moist gauze, germinate in 15-20 environments, and the seeds can be exposed in 2-3 days.

2. Lettuce should be cultivated in autumn, winter and spring, and the seeds should be sown in a planting cup containing fixes, such as vermiculite, etc., or a seedling tray containing seedling substrate, and each cup should be sown with 1-2 seeds, and covered with a layer of substrate after sowing. Then cover with shade nets, drench enough water, keep it moist, and wait for the seedlings to emerge. About 10 days before planting, the water should be properly controlled according to the seedling condition.

When the seedlings have 6-7 true leaves, the seedlings are planted in a nutrient bowl**, and then the seedlings are filled with vermiculite.

3. The formula of nutrient solution suitable for lettuce growth is (gram tons): calcium nitrate 621, potassium nitrate 444, dihydrogen phosphate cover potassium 330, magnesium sulfate 500, ammonium nitrate 69. In the early stage of planting, due to the small plant and underdeveloped root system, it can be deeper, and the depth of the nutrient solution is kept at about 10 cm, so it is advisable to soak it to the bottom of the planting cup 1-2 cm, with the elongation and growth of the root system, the water level can be gradually reduced, and the liquid level can be reduced to 5-8 cm, so that a part of the root system is exposed to the air, so as to increase the opportunity for root oxygen absorption, promote root development and plant growth.

4. When the plants reach the harvesting standard, they should be harvested in time. The harvest period is different for different varieties and different cultivation seasons, and the growth period of non-bulbling lettuce is 60-90 days, and the growth period of bulb-bearing lettuce is 100-120 days.

2. Precautions for planting

1. Due to the short growth period of lettuce, if there is no large physiological disease in the cultivation process, the nutrient solution does not need to be replaced, and can be used continuously for 3-4 months to produce 2-3 crops to reduce the cost of fertilizer production.

2. Lettuce likes cold climate, and the suitable temperature for growth is 15-20, which is most suitable for growing in an environment with a large temperature difference between day and night and low temperature at night. The daytime temperature can be kept at 18-20, more than 25 should be ventilated, and the night temperature can be kept at 10-12.

3. Carbon dioxide gas fertilizer can be applied by using a carbon dioxide cylinder or carbon dioxide generator to supplement the carbon dioxide in the shed, promote the photosynthesis of plants, and improve the yield.

Our tradition is to grow vegetables, which cannot be separated from soil and water, and occupies a lot of space. But the way to grow vegetables with fog is different. No soil, no water, the yield is about 2 times higher than soil culture, it does not take up space, and it can be planted on the wall!

Aerosol planting is a new planting method that has emerged in recent years, aerosol planting doubles crop yield, effectively solves the contradiction of water, air and nutrients that are difficult to solve by traditional soil planting, makes crop roots in the most suitable environmental conditions, gives full play to the growth potential of crops, and greatly improves plant growth and biomass. This is a soilless cultivation technique that uses a spray device to atomize the nutrient solution like a small bell and spray it directly to the roots of the plant, providing the water and nutrients needed for plant growth. The specific work is as follows:

1.Wrap vegetable stems or seeds in a square sponge of about 2 cm and hang them on a sealed planting device (trough, box, bed). 2.

Planting with tweezers in the Jingjiagou of the extruded plate, the roots will be exposed to the inside of the planting device. 3.Using an automatic spraying device, the nutrient solution is atomized into small water droplets at regular intervals and sprayed directly onto the roots of the plants, providing the water and nutrients needed for plant growth.

Advantages of aerosol cultivation. 1.As one of the most water-efficient cultivation techniques, aeroponics can increase water utilization to nearly 100%.

Because in gas mist planting, the water passes through the spray** plant roots, and the atomized accumulated water returns to the nutrient solution pool** through the liquid tube, and the loss of water evaporation is very small, compared with traditional soil planting, it can reach 98%.

2.As one of the most energy-efficient fertilizer cultivation technologies, the roots of aerosol growing plants are suspended in the air and can fully enjoy oxygen, so the absorption efficiency of mineral and ionic fertilizers is very high. This is incomparable to the Marine Police and Tupei.

In addition, due to the cultivation technology with a very high recycling absorption utilization rate such as fertilizer and water leakage, soil fixation, microbial decomposition and utilization, and ammonia evaporation loss in the soil planting environment, gas mist culture can reach more than 95% compared with soil planting. 3.Pesticides required for insecticide and sterilization can be minimized or grown without pesticides.

Gas mist planting can produce a clean, organic and soilless environment, create organic nutrients and hidden space where germs, bacteria or insects do not multiply, greatly reduce the probability of pests and diseases, and basically eliminate pesticide production.

4.There are no restrictions on the environment in which it is grown. Where there is electricity and water, gas mist can be planted to maximize three-dimensional planting.

5.There will be no dirt caused by environmental cleaning, soil or other pollution, and factory-style clean production can be improved. There are no sources of pollution and no pollutants occur.

It is the cleanest and most advanced model of agricultural production in the future. The fruits and vegetables produced by it are first-class, high-grade, clean and pesticide-free and safe food. It will be the most cutting-edge technology to safeguard human health and maintain the ecological environment.

OK. The growth period of lettuce is relatively short, the nutrient solution does not need to be replaced, the nutrient solution can be circulated 2 or 4 times during the day, the root system is not developed when it is just planted, the water level is higher, and the water level of the nutrient solution is reduced after the plant grows up, which is conducive to the absorption of oxygen by the root system.

Lettuce is basically hydroponic, which is simple and easy to understand, that is, lettuce seedlings are grown in a nutrient solution. The difficulty is the control of the composition of the nutrient solution and the disinfection measures. The whole process of soilless cultivation should ensure the regular circulation of nutrient solution, so that lettuce can have enough nutrient requirements.

The overall lettuce soilless cultivation system has greenhouses, nutrient solution pools, circulation systems, soilless cultivation facilities, circulating pipelines, etc., and soilless cultivation equipment includes many styles, pipe culture, water tank type, spiral type, gold tower type, pipe culture or round pipe and square pipe, which are suitable for planting lettuce.

Most vegetables can be cultivated without soil, because most vegetables use the root system to absorb nutrients, as long as there is a suitable physical environment and nutrients.

To plant lettuce, choose loose and breathable, nutritious potting soil, and then sprinkle the seeds full of particles into the soil, and water it with water, lettuce will sprout and grow after a week, after the lettuce grows three or four leaves, the seedlings that grow too dense should be removed to avoid poor growth of the plant.

1. Choose potting soil

Lettuce is suitable for growing in fertile and loose soil, well-drained soil, when planting, choose loose soil, nutrient-rich sandy soil, and well-drained pots, and use sunlight to sterilize the potting soil to avoid bacteria causing damage to lettuce.

2. Sowing and planting

When sowing lettuce, the potting soil should be loosened, and then the seeds with full grains and no mold and deterioration should be sprinkled into it, and watered once, soak the whole soil, and the lettuce seeds will germinate after a week, and after the seedlings have grown three or four leaves, the thinly growing lettuce should be removed.

3. Post-management

In the later management, organic fertilizer should be buried in the soil to provide nutrients for lettuce, and water should be replenished in time after fertilization, and fertilizer should be diluted to avoid fertilizer damage to lettuce. Lettuce loves light and should be placed on a balcony or by a window to allow the plants to receive plenty of light.

Lettuce can generally be sown in all seasons, mainly in spring and autumn, and then the selected seeds are treated with germination to ensure that the soil is loose and well drained, the planting bud end is downward and watered thoroughly, nitrogen fertilizer is applied every 30 40 days, the temperature is controlled at about 15 20, and the prevention of diseases.

Generally speaking, lettuce can be sown in all seasons, and the taste is the best in spring and autumn, and it is also the most nutritious, if the temperature is higher than 30 degrees, the seeds should be refrigerated for germination to ensure the germination rate.

Generally, lettuce seeds are cleaned, then soaked in clean water for 4 5 hours, and then poured out of the water and placed in a greenhouse, maintaining a good ventilation environment, generally germinating after 3 5 hours.

Lettuce is very adaptable, it is best to choose loose fertile soil, generally use humus, forest soil, river sand according to the ratio of 3:1:2 to mix and modulate, and then pour in the appropriate amount of water in time, and to water thoroughly, apply a small amount of nitrogen fertilizer.

Then insert the germinated seeds into them respectively, the bud end is the best downward, or it can be planted appropriately densely, keep the row spacing at about 10cm, and water thoroughly after sowing, keep the soil moist until the seedlings emerge.

Lettuce must keep the soil moist throughout the process, it is best to wet it when it is dry, generally watered once in the morning and evening, apply thin nitrogen fertilizer every 30 to 40 days, and apply it along the leaf stem.

Lettuce in the growth period, prefer a cold climate, the general temperature control at 15 20 is the best, hot time can be appropriate shade, but not too long, short-term below 0 degrees can also grow normally.

Generally, lettuce has more soft rot during the growth period, and it is best to clean up the impurities on the soil from time to time, and then disinfect with a small amount of potassium permanganate to avoid the production of germs.

Prepare an open field, and if the water is not available, you can also use a vegetable pot or foam box to plant. The soil requires humus soil or nutrient-rich garden soil, where leftover vegetables from the kitchen can be buried and used to grow lettuce after they have decayed.

Once the soil is ready, sprinkle the seeds directly on top of it. If the open space is large, sprinkle it a little more thinly, so that the lettuce that grows later is more robust. After sprinkling the seeds, water them in time, at this time to water thoroughly and cover with fine soil.

After planting, it should be watered every 2 to 3 days, and the soil should be kept moist at all times, and germination will occur in about two weeks. This germination time also depends on the local climate. After germination, you can reduce the amount of watering, but also pay attention to the soil must be slightly moist and sufficient, so that it is more conducive to the growth of lettuce.