Hydroponic lettuce cultivation method, can lettuce be grown hydroponically

There are three ways to grow lettuce at home:

1. In fact, lettuce can be planted all year round, as long as the temperature is below 20 degrees, it can be sown at any time, and if the temperature is high, you want to plant lettuce, you can also choose some heat-resistant lettuce varieties to plant, the general lettuce is very suitable for sowing in autumn, so that it will continue to grow in winter.

There are many types of lettuce, some are smaller, some can form balls, some have larger leaves, some have a better taste, and some purple-leaved lettuce, and the planting methods are similar.

2. As for the choice of lettuce planting tools, as long as it is a container that can be loaded into the soil, it can be planted, pay attention to flower pots or other containers, foam boxes, empty oil drums, and there must be drainage holes, otherwise the growth is not good, and it is easy to yellow leaves, because the potting soil is easy to accumulate water.

It is recommended to use some plastic long pots, so that you can plant a lot of seedlings, and it is easy to place, plant a few pots on the balcony, more neat, clean and beautiful. You can use ordinary garden soil for potting soil, and if you don't want to buy soil back, you can also mix soil yourself.

It is to add some fertile humus to the soil, or add some well-rotted organic fertilizer, chicken manure, sheep manure, etc., to increase the fertility of the soil, and continue to provide nutrients for lettuce seedlings.

3. Before sowing, make the potting soil looser, softer, pinch the potting soil by hand, it will not form a clump, if the seeds are sprinkled unevenly, you can mix them with the sand, sprinkle them in the pot, sow them for the first time, try to sprinkle a little less seeds, and be even.

Then water thoroughly and put it on the balcony in a well-lit, ventilated place with a temperature of about 20 degrees, and the germination rate will be very fast. After germination, when three leaves generally grow, if the seedlings are too many and too dense, you can pull out some, or wait until the seedlings grow up again, you can transplant some seedlings.

The transplanted lettuce seedlings will grow better, and the transplanted and untransplanted seedlings are completely different, and the transplanted lettuce will grow particularly lush and the leaves will be larger. In short, the spacing between seedlings should not be too small, otherwise they will not get enough nutrients and sunlight, and the growth will be poor.

After germination and seedling, it is necessary to increase the light, after growing up, it is necessary to supplement some fertilizer, which must be fertilized, you can pour some cake fertilizer water, or sheep manure soaked in water, watered in the pot soil, there is really no organic fertilizer, you can give some compound fertilizer or chemical fertilizer, no fertilizer must not grow lush, and at the same time watering should be timely, the potting soil is too dry, and the lettuce leaves are not watery enough.

Only sufficient fertilizer and water and light can make the leaves more delicious and taste better. Lettuce is very easy to grow, you will know if you have planted it once, and the balcony has become a world of lettuce, and it has become a beautiful and vibrant little vegetable garden, and you can eat the freshest lettuce.

To plant hydroponic lettuce, you must first make a hydroponic box, clean and disinfect the soil of the lettuce root system, and then put the lettuce into a foam floating board with holes, and finally put it into the hydroponic box.

1. Make hydroponic tanks

If you want to grow lettuce hydroponically, then you first need to make a hydroponic box, first prepare a watertight box, and then prepare a foam float, and dig a few small holes with a certain spacing in the foam float, the holes should not be too big, and the lettuce roots can be completely put into it.

2. Lettuce processing

Prepare a robust lettuce with a root system, rinse the soil on the surface of its root system with clean water, then comb it slightly, cut off some of the weak roots and stumps, and disinfect it with potassium permonate, in order to eliminate germs and reduce the chance of rotten roots and death of hydroponic lettuce.

3. Hydroponic planting

Add water to the hydroponic container, and then put the root system of the lettuce into the hole of the foam float to fix it, and then put the lettuce into the water together with the float, so that the root system of the lettuce can contact the water, and the appropriate amount of nutrient solution can be added to the water, which is conducive to the vigorous growth of lettuce.

4. Maintenance method

Hydroponic lettuce needs to be maintained and managed after planting, it is best to maintain it in a ventilated and cool environment, the temperature is about 20 is the most suitable, and then it is necessary to change the water more, so as not to deteriorate the water quality for a long time, it is best to let the water stand for two days when breeding in tap water, and then use it after the chlorine in the water volatilizes.

Lettuce can be hydroponic, before hydroponics need to make a hydroponic box, place a floating board inside, poke out small holes. Lettuce hydroponic method: to treat seedlings, it is necessary to select robust seedlings, carry out disinfection and soaking, and then transplant; Hydroponics method, in which the roots are placed in foam board and finally in water; Daily maintenance, the seedlings can be transferred to a ventilated and cool climate, and the ambient temperature is stable at about 30.

Lettuce can be hydroponically planted, before planting need to be made into a special hydroponic box, prepare a watertight plastic box, and then place a foam floating board, according to the spacing of 5 10 cm poke out a small hole above, the hole should not be too large, just bury the root system completely to avoid the root system being immersed in water, so that the whole seedling is rotten and blackened.

1. Treat seedlings

When hydroponics of lettuce, it is necessary to select robust seedlings, treat the surface soil with water, properly comb the root system, prune off the remaining weak roots, and then place it in the diluted potassium permanganate solution for soaking and disinfection treatment, so as to reduce the breeding of pathogens, so as to improve the survival rate after transplanting.

2. Hydroponic method

In the process of hydroponic lettuce, you need to pour an appropriate amount of water into the inside, and finally place the roots in the holes in the foam board to fix them, and finally put the lettuce in the water with the floating board to let the roots touch the water surface. After transplanting is completed, 2 or 3 drops of nutrient solution can be added to the inside to speed up the growth rate of seedlings.

3. Daily maintenance

After the planting is completed, the lettuce seedlings need to be reasonably maintained, the seedlings can be placed in a ventilated and cool climate environment, and the ambient temperature is stabilized at about 20. Generally, tap water can be dried for 2 to 3 days as water quality.

Compared with general soil cultivation, hydroponic lettuce has the advantages of good quality, high commodity value, few pests and diseases, and no continuous cropping obstacles. In February last year, we conducted a trial cultivation of hydroponic lettuce. Among them, the static hydroponic lettuce is simple and easy to operate, and it is suitable for popularization and use in production.

The following is a brief introduction to its cultivation management technology.

1.Variety selection and seasonal arrangement: lettuce likes cold and cool, and grows best in the temperature range of 15 to 25 in winter and spring, and grows slowly below 15, and grows poorly above 30, and is easy to sprout and flower. Hydroponic lettuce is suitable for choosing loose-leaf lettuce varieties.

2.Nutrient solution preparation and cultivation container selection: 600 grams of calcium nitrate, 600 grams of potassium nitrate, 350 grams of magnesium sulfate, 150 grams of ammonium dihydrogen phosphate per ton of water are added to the nutrient solution formula, and the general formula is selected for micro-fertilizer.

When cultivating in production, cultivation gutters or cultivation pools can be used; When cultivating at home, use pots, bowls, boxes, etc., to ensure that there is no leakage.

3.Seedling planting:

1) Seedling: take the seedling tray with vermiculite as the seedling substrate, before sowing, the vermiculite is soaked with water, the seeds are evenly sown on the vermiculite, and then covered with a layer of vermiculite equivalent to twice the seed, watered thoroughly, under the temperature of 20, 5 7 days can emerge. After emergence, they are watered with a nutrient solution with EC value (conductivity, the main indicator of water quality standards).

2) Planting: Take a foam board, make a hole every 20 cm, the hole diameter is cm, and cover the mouth of the hydroponic container tightly. The container is filled with nutrient solution, EC value.

When the lettuce seedlings grow to 2 true leaves, the seedlings are planted separately. First, wash the vermiculite at the root of the seedlings, wrap sponge strips around the base of the stem, and then stuff the seedlings into the holes in the foam board. Keeping the stem base dry and breathable can greatly reduce the occurrence of rhizome base diseases.

4.Management and harvesting: The management process of hydroponic lettuce is very simple, after planting, in order to maintain the stability and consistency of the nutrient solution surface, the nutrient solution can be added once every 2 3 days, the water temperature is 20 22, and the pH value is 6.

When the seedlings have 3 or 4 true leaves, adjust the EC value, and continue to add nutrient solution according to the situation, and it can grow into a commercial vegetable in about 20 25 days.

When cultivating at home, you can use the method of picking leaves and eating them as you pick them to keep them fresh. In terms of production, it is generally harvested at one time. In order to visually express the characteristics of hydroponic vegetables, it is better to bring a part of the white root system.

In order to reduce the nitrate content in lettuce, one week before harvesting, there is no need to supplement nutrients, only water is added.

5.Pests and diseases: Hydroponic lettuce has very few pests and diseases.

In nutrient solution hydroponics, it is important to keep the nutrient solution clean, because once root diseases occur, they can spread quickly and cause irreparable losses. In addition to the disinfection of the nutrient solution, the nutrient solution should be thoroughly renewed once a month. In summer, aphids, red spiders and other insect pests sometimes occur, which can be controlled with high-efficiency and low-toxicity biological pesticide avemacter preparations.

Variety selection, loose-leaf lettuce can be selected for hydroponics; The nutrient solution is prepared, and potassium nitrate, magnesium sulfate, calcium nitrate, and ammonium dihydrogen phosphate are prepared according to a certain proportion; sowing seedlings, using vermiculite as a seedling substrate; Colonization management, colonization of plant row spacing of 16 to 24 cm.

Lettuce varieties are divided into three types: loose leaf lettuce, erect lettuce, and ball lettuce, all three of which can be used for hydroponics, and it is generally best to choose early-maturing and heat-tolerant varieties, so it is best to choose loose leaf lettuce. The suitable growth temperature for lettuce is 15-25 degrees, and the temperature should not be higher than 30 degrees and lower than 15 degrees, otherwise it will lead to poor growth.

Add 600 grams of potassium nitrate, 350 grams of magnesium sulfate, 600 grams of calcium nitrate, and 150 grams of ammonium dihydrogen phosphate to each ton of water. You can use a cultivation pond or trough for planting, and if it is a home cultivation, you can use a pot, bowl and other containers, taking care to ensure that there is no leakage.

Vermiculite can be used as a seedling substrate, soaked in water before sowing, then sprinkled with uniform seeds, and covered with double vermiculite after watering, placed in a cool place. Keep the temperature at about 20 degrees, generally 5-7 days can emerge, after the emergence of seedlings according to the growth situation watering 1-2 times 1 4 nutrient solution.

Make holes every 20 cm in the foam board with a diameter of centimeters. When the seedlings grow 2 true leaves, and the root tips are punctured from the bottom of the sponge block, they can be colonized, and the row spacing of the colonized plants is generally 16 24 cm. Tear the seedlings from the tray along with the sponge and stuff them into the planting holes.

Hydroponic lettuce is best carried out in the spring of each year, before hydroponic plants, you need to provide a clean, transparent container for it, and then put a foam board into the container, and make a small hole with a diameter of centimeters every 20 cm in the foam board, and then insert the germinated lettuce seeds into the foam board.

1. Planting time

Hydroponic lettuce is best carried out around April every year, the temperature at this time is generally between 15-25 degrees, in line with the growth habit of lettuce, can improve the quality of the plant, pay attention to when the temperature is lower than 15 degrees or higher than 30 degrees, you need to adjust the temperature for the lettuce to avoid affecting the growth of the plant.

2. Provide containers

Before hydroponic lettuce, prepare a transparent container, soak the container in disinfectant for another 20 minutes to remove the bacteria in it, then put a foam board into the container, and make a row of small holes with a diameter of centimeters on the foam board, and then pour the diluted nutrient solution into the foam board.

3. Cultivate seeds

When cultivating lettuce seeds, the seeds should be spread on vermiculite, and then covered with a layer of 2 cm thick vermiculite, and then wait for about 7 days for the lettuce seeds to emerge.

4. Disease protection

Hydroponic lettuce has fewer insect pests, but in the process of hydroponics, the water quality is easy to pollute, which breeds bacteria, so it is necessary to clean the container for lettuce seeds every 5-7 days to keep the nutrient solution clean, so as to avoid lettuce diseases.

The method is as follows: fleshy root cultivation.

Land selection and land preparation. Select a field with sufficient fertility, turn it deep and apply 3,000 kg of organic fertilizer and 20 kg of calcium phosphate, and finally level it for later use.

Seed treatment. Choose healthy, plump seeds to dry and soak in cool water, remove and drain for later use.

2) Sowing method: open a shallow ditch in the field according to the row spacing of 25 cm, cover the soil after sowing, and cover the film and water thoroughly.

3) Post-sowing management technology: after the emergence of seedlings, cut the mulched huyan membrane, 20 30 days after the emergence of seedlings, top application of nitrogen fertilizer 1 2 times, loosening soil weeding, during which the dryness and wetness of the field are observed, and appropriate watering. After 3 months, potassium dihydrogen phosphate was sprayed on the foliar surface 1 2 times to promote the growth of fleshy roots.

4. Dig the roots to dry.

10 In late November, the whole fleshy root is dug out, the old yellow leaves are removed, and the petiole of 1 cm is retained at the base of the leaf and dried in the sun.

Refrigerated storage. Put the dried meat root code in a box, directly transport it to the cold storage at minus 18 degrees Celsius, freeze it for a period of time and then heat it up to minus 7 degrees Celsius for long-term storage.

Hydroponic methods. Thaw state socks: Place the fleshy roots at a constant temperature of zero degrees Celsius for 2 days.

Washing: Remove the tips of the fleshy roots, clean them, and place them in a culture dish with running water at half the point of the fleshy roots. Then the humidity of the growing environment was controlled at 92 95%, and the temperature was maintained at 18 to 20 degrees Celsius for 7 days.

Continue to grow for 7 days after cooling down by 1 degree Celsius, and then continue to grow after lowering the temperature by 1 degree Celsius for 7 days.

Hydroponics: The base of the bud bulb is cut, the damaged outer leaves are peeled off, and the hydroponics is completed after packaging and storage in an environment with zero Celsius intensity.