Why are the roots of hydroponic vegetables so white?

Hydroponics, also known as "hydroponics", is one of the main types of soilless culture. Hydroponics is a cultivation method that creates a relatively closed environment that can store nutrient solution through specific facilities, and keeps the water, fertilizer, gas, heat and other conditions required for root growth relatively stable, and all or part of the root system is "soaked" in the nutrient solution.

In the strict sense of the word, hydroponics is pure soilless cultivation. Because there is no intermediate adsorption and buffer medium between the root system and the nutrient solution, it is a direct "soaking" contact. For plants to grow healthily, the first thing to do is to ensure that the root system is growing well, and whether the root system grows well depends on the rhizosphere environment.

The temperature, oxygen, pH, ion concentration and the ratio between different ions in the rhizosphere environment should be appropriate. And whether the mineral nutrients in the nutrient solution are complete, whether the anion and ion are balanced, whether it contains toxic and harmful substances, whether it contains pathogenic microorganisms, pests, etc., will be manifested in the appearance of the root system. If the root system is white, firm, elastic, not twisted, not discolored, and not broken, it proves that the root system is growing healthily.

When the root system grows healthily, the plant can absorb water and fertilizer normally, and the aboveground growth of the plant will be normal. On the other hand, if the root system shows the phenomenon of blackening of the root tip, yellowing of the root system or even decay, the stems and leaves, flowers and fruits of the aboveground part of the plant will also show "abnormal" symptoms. Therefore, hydroponic technology is one of the scientific research methods to test whether the plant nutrients are complete and whether the rhizosphere environment is suitable.

Soilless vegetables do not come into contact with the soil, the root system will definitely be white, because there is no soil staining, and it has been soaked in the nutrient solution, the root system will be like this, even if people's hands and feet have been soaked in water, it will be white, so it is normal for the roots of hydroponic vegetables to be white.

Because these roots are not stained with soil, they are all nutrient solutions to maintain growth, and the root system is naturally white.

Soilless cultivation is basically soaked in water. They all have special water and special nutrient solutions. There is not much sunlight, so its roots are generally very white.

Soilless cultivation, the root system of hydroponic vegetables is particularly clean, because the water quality feels that the water is often changed, and the water has a scouring effect.

Soilless cultivation, no soil pollution, completely dependent on hydroponic vegetables, of course, the root system is white.

Different properties: Hydroponic vegetables are mostly rooted in the nutrient solution layer, and only provide water and nutrients to them through the nutrient solution. Potting experiments in soil culture using soil as the medium for plant growth.

2. Different environments: Soil culture plants have a significant increase in the air humidity of the surrounding environment under the condition of normal growth and normal soil moisture supply. Pay attention to the bottom of the pot not to accumulate water, otherwise it is easy to nourish mosquitoes.

Hydroponic plants should be changed once a week, otherwise it is easy to nourish mosquitoes. Prune off rotten roots in time. It can significantly increase the air humidity of the surrounding environment of plants.

3. Different fertilization methods: soil culture plants mainly add granular fertilizer, and the fertilizer dissolves slowly and absorbs slowly. Hydroponic plants can be supplemented with liquid fertilizer. Fertilizer dissolves quickly and absorbs quickly.

Hydroponic vegetables are the roots of plants that are soaked in flowing water (nutrient solution), while soil-grown vegetables are planted on the ground with the roots of plants.

Hydroponic sparse vegetables are cleaner and can be cultivated in batches, which can continue to meet the demand. However, soil-grown vegetables have certain limitations in time and space, and there is often a one-time problem.

As long as the nutrition is scientific, there is no difference in taste and nutritional value for the vegetables themselves.

This does not mean that all vegetables can be used for hydroponics, that is to say, if it is a vegetable that cannot be configured with hydroponics, of course it is not, so the vegetables of this hydroponic are also strict, and this water quality is also very important.

Good evening, according to your question, the reason why hydroponic vegetables can grow without roots: the development of hydroponic vegetables has such a period, and the requirements for the environment are more stringent when rooting, so many times the nutrients in the water also need to be added regularly. I believe that many players will have this feeling about hydroponic plants for a long time, in fact, if the plant does not take root for a long time, you can consider adding aspirin to the water Before use, you must crush the aspirin into pieces, which contains rich salicylic acid is a good promotion for the rooting of the plant, and the plant can take root smoothly soon after joining.

Usually, it can be slowly decomposed by throwing it directly into a hydroponic container, but its effect is slower than if it were not rented. The use of dregs as a normal growing plant does not affect its practical value at all. To maintain sufficient nutrients, different plants have different absorption of nutrients, and it is actually normal to cultivate them in different ways, because hydroponic plants have relatively high requirements for the environment.

If it is only cultivated with water, then the nutrients needed by the plant will be very scarce, and hydroponic plants are often inferior to soil-grown plants in terms of nutrient absorption. <

I hope my answers help you and wish you good health and a happy life. <>

Many people think that hydroponic vegetables are "potion" soaked and unsafe, but in fact their safety is unquestionable. Let's take a look at this "potion" - what is the nutrient solution? Hydroponics and soil cultivation were then compared from the perspective of safe cultivation.

Nutrient solution: It is known that plant growth must have 17 kinds of mineral nutrients, different crops will be supplemented or adjusted, vegetables are the same, the nutrient solution is based on the natural growth state of different vegetable crops on the nutrient demand law, the use of some chemical fertilizers for accurate preparation, so as to provide nutrients for the growth of vegetables more reasonably and effectively, it has no essential difference with the composition of effective nutrients in the soil, Most of the nutrients in the soil also need to be transformed by microorganisms or other chemical transformations to form ionic forms before they can be absorbed by vegetables.

Some people split the formula of the nutrient solution used in vegetables as follows: including calcium nitrate, potassium nitrate, nitric acid, magnesium sulfate, potassium silicate, potassium dioxide phosphate, iron chelate, sodium borate, manganese sulfate, copper sulfate, zinc sulfate, ammonium molybdate. (Preparation and management of hydroponic vegetable nutrient solution, Nongguang**).

From these raw materials, it is not difficult to see that the nutrient solution is actually a widely used fertilizer, and some are even food dispensing and pharmaceutical raw materials, which are originally long-term fertilizers, and there is no safety risk.

However, it should be noted that hydroponics has a more direct and efficient water and fertilizer absorption capacity than soil planting, so the management requirements should be more stringent.

No pollution: Hydroponic vegetables grow in a relatively secure environment such as nutrient solution, so they are completely free of harmful substances such as soil heavy metals, and the products are safer than soil planting.

Hydroponic vegetable cultivation methods at home:

1. Make hydroponic tanks.

Before growing hydroponic vegetables, it is necessary to prepare a watertight hydroponic box, and it is recommended that you use plastic foam boxes. A float of the same size is placed on top of the box to carry the vegetables.

2. Handle vegetables.

Before hydroponic planting, the vegetables should be treated simply, and the hydroponic vegetables should be selected first, and the roots should be rinsed with clean water. Then comb its roots, use scissors to cut off its dead roots and rotten roots, and then use potassium permanganate.

Disinfect. The disinfected root system should not be directly hydroponic, but should be rinsed with clean water before colonization.

3. Hydroponics.

Be careful not to damage its roots when planting, and it is best to add the right amount of nutrient solution to the hydroponic box.

The root system of the seedlings should be planted well, and there should be water in the hydroponic tank at all times.

4. Planting and maintenance.

Pay attention to changing the water after planting, because there will be a lot of bacteria in the water during hydroponics, and the water quality will deteriorate over time. Therefore, it is necessary to pay attention to the water exchange, which can be used from rainwater, water from ponds, or water from rivers.

To supplement nutrients, you can properly apply water-soluble fertilizer to fertile leaves, and pay attention to dilution.

The hydroponic vegetable cultivation techniques are as follows:

1. Hydroponic tank construction: prepare an opaque water tank (styrofoam box is sufficient).

2. Nutrient solution configuration: the main fertilizers that configure the nutrient solution are: calcium nitrate, potassium nitrate, magnesium nitrate, potassium silicate, potassium dihydrogen phosphate, the potassium dihydrogen phosphate in the nutrient solution is best to choose the fast dissolving Hai and Weihai meal powder potassium dihydrogen phosphate, which dissolves quickly and will not form knots with other products.

Micro-fertilizers include: chelate iron, sodium borate, manganese sulfate, copper sulfate, zinc sulfate, ammonium molybdate.

3. Substrate seedlings: generally use nutrient soil to raise seedlings, and when the seedlings grow two or three true leaves, they can be transplanted and planted.

4. Seedling planting: After the seedlings are planted as the cup, we need to add an appropriate amount of nutrient solution to the hydroponic box, and then the planting cup is placed on the foam floating plate for cultivation. Use a planting cup for each small hole, and then adjust the liquid level height of the nutrient solution, generally just touching the bottom of the planting cup.

5. Post-management: reasonable control of the concentration of nutrient solution, as well as the temperature and light of planting.

This is the lettuce, hydroponic lettuce method:

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, growing slowly below 15, and growing poorly above 30, and is easy to sprout and flower. Hydroponic lettuce is suitable for choosing loose-leaf lettuce varieties.

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.

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).

Planting: Take the foam board, make a hole every 20 cm, the hole diameter is cm, and the mouth of the hydroponic container is tightly covered. 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.

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.

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.

Answer: Hello, hydroponic vegetables are to rinse the roots of the vegetables to be hydroponic, it is best to disinfect to reduce pests and diseases, and then plant the vegetables in a water tank with nutrient solution, and change the water regularly.