How to grow radishes so that they don t have black hearts? What causes radish black hearts?

Radish black heart is because of leaf disease, and it is very important to prevent waterlogging. <> radish black heart, that is, radish black skin, also known as black turn. At the seedling stage, the cotyledons are soaked in water, and the inside of the taproot becomes black and rotten.

When the leaf is diseased, yellow spots appear on the leaf margin, which then expand into the inside of the leaf and become a "V" shape, and all the leaf veins turn black. The fungus spreads down the veins and vascular bundles, and finally the whole leaf turns yellow and wilts. In the early stage of fleshy root disease, dark gray color can be seen in sunlight.

The cross-section of the radish shows dark brown vascular bundles. Finally, the whole interior becomes black, and there are pus in the vascular bundles in the wet state, and cavities form in the dry state. The black heart of the radish caused by boron deficiency will not have pus.

It is worth noting that the fleshy roots of radish black rot are infected, and the skin of the fleshy roots basically does not show symptoms such as blackening. If mixed with soft rot fungi, it will cause the fleshy roots to rot and produce a foul odor. <>

What causes radish black hearts? Mainly because of the use of organic fertilizers that are not completely decomposed. Because the soil is compact, hard and has poor air permeability.

During the growing season of radish, excessive irrigation leads to root pouring, resulting in a lack of oxygen in some tissues. Because underground pests and striped jumping beetle larvae bite the root bark, they will leave some small marks on the root bark. Coupled with the action of some harmful substances, it leaves an unsightly black line.

The main measures to prevent black hearts of radishes are mainly in the following ways: to apply fully decomposed organic fertilizer, when planting radish, not only high fertility is required, but also the soil is rich in organic matter. When fertilizing, fertilizers should not only be abundant, but also of high quality.

When applying organic fertilizer, it is necessary to pay attention to the selection of high-quality organic fertilizer that is thoroughly rotted, which can not only provide sufficient organic matter for the soil**, but also prevent radishes from producing black skin or black heart. If the organic fertilizer that is not completely decomposed is applied, the activity of microorganisms in the soil will be strengthened during the decomposition of the organic fertilizer, which will consume more oxygen in the soil, resulting in suffocation of radish, and some tissues will appear black skin or black heart due to lack of oxygen.

When planting, it is necessary to determine that the cultivation range is very high, and the area should be large, and in the process of planting, it is necessary to fertilize scientifically, water reasonably, and sow seeds at the right time; It may be because of damage to the roots and leaves, or because the temperature is too high, and the cotyledons are waterlogged during the seedling stage of the radish, all of which can cause a black heart.

To choose the right variety, pay attention to watering, pay attention to fertilization, need to pay attention to the condition of the soil, spraying pesticides, most of them are because the amount of water is too large, and it may also be caused by diseases.

When planting, we must pay attention to loose soil, and then we must choose the best organic fertilizer, we must clean up the stagnant water in time, and pay attention to the light time in the future. It's caused by a lack of oxygen.

The main symptoms of black heart in radish are: on the lateral roots of the fleshy root of radish and the epidermis of the root primordial base of the radish, there are black, long fusiform horizontal stripes with cracks, it does not penetrate deep into the interior, nor does it affect the intrinsic quality of the radish, but because of the existence of black-brown horizontal lines, the commerciality of radish will be greatly reduced, and some radishes with black hearts will lose their edible value.

<> boron is an indispensable trace element for the growth of crops, due to various reasons resulting in boron deficiency in radish, the flesh will appear yellow, black, hollow or rotten, sometimes accompanied by rough epidermis and cracking symptoms. The cause of hollowness is the lack of boron, which inhibits the absorption of calcium by the roots. In this way, it is necessary to use drugs to prevent it, and it is recommended to soak the seeds before planting the radish, and the "Fumeishuang" solution is used.

After planting, you can use "desemin" to spray to do a good job in the prevention of black heart disease.

It is necessary to irrigate reasonably, strengthen cultivation and weeding, loosen the soil, maintain soil permeability, supply sufficient oxygen to the roots of radish, and promote its healthy growth. Drain water in time after the rain, so that there is no water on the ground after the rain, and prevent the ground plate knot caused by water accumulation and cause black hearts. After cutting the fleshy root of the radish, you can find that there are many small black spots or patches on the inside of the fleshy root, and when you press it by hand, you will feel that the blackened part is slightly hard and inedible.

The whole radish looks dull and in poor condition. The preservation of radish is very important, we usually buy radish is recommended to eat as much as you want, you must not buy too much, because there is no professional cellar to store, radish is easy to deteriorate after a long time, if you buy more radish can also be placed in the refrigerator to store.

When planting radish, it is necessary to choose seedlings with strong disease resistance, and at the same time, the soil should be sterilized, and quicklime can be sprinkled to plow the soil, so that the lime and the soil are evenly combined, which can effectively kill the bacteria used in the soil. Seasonal cultivation should not be too early, and appropriate late sowing at a suitable sowing date can reduce the onset of diseases. Strengthen cultivation management, squat seedlings at the appropriate time, water water frequently at the seedling stage, reduce soil temperature, and time seedlings and seedlings.

Prevent excessive drought or flooding. Crop rotation and stubble, using formula fertilization skills.

The black heart of radish is caused by the appearance of transverse filamentous black lines on the epidermis of the root and becomes rough, and the internal tissues of the heavy ones are discolored and deteriorated. The main reasons are boron deficiency and excessive chloride ions; high groundwater level and poor drainage; It is caused by the application of unrotted fertilizer. Therefore, planting in low-lying areas should be avoided; No or less chlorine-containing compounds and increased boron fertilizer.

Boron is easy to leach in the rainy season, drought is easy to be fixed, should be combined with base fertilizer and root topdressing, 1 kg of borax per mu as base fertilizer, foliar spraying of borax 2-3 times.

It may be a black heart caused by lack of oxygen in the roots, and after cutting the roots, you will find that the xylem of the fleshy roots turns black, and a lot of black dots appear. This is caused by the application of a large amount of unrotted or poorly rotted organic fertilizer in the field, especially the circle manure, which will go to the soil with strong microbial activity, excessive oxygen consumption, resulting in root suffocation, and some tissues due to lack of oxygen and cause black heart or black skin.

There are three main reasons for the occurrence of black skin and black heart in radish:

First, it is the lack of boron in the soil.

Second, it is the soil that is waterlogged or compacted and lacks oxygen.

Third, it is caused by black rot.

The main reason for the black heart of the fleshy root of radish is the lack of oxygen in the root tissue caused by various factors. If a large amount of unrotted or poorly rotted organic fertilizer is applied in the radish field, especially the circle manure, or the weeds, residual branches and leaves of the plot are not cleaned up in time, or rotary tillage into the soil, planted in a short time, the microbial activity in the soil is vigorous, the consumption of oxygen is excessive, and it is easy to cause root suffocation, and some tissues will have black skin or black heart due to lack of oxygen.

Do not eat carrots and white radishes together:Although carrots and white radishes have many benefits for the human body, eating them together will reduce the nutrition of the two. White radish is high in vitamin C, and carrots contain a decomposition enzyme that fights vitamin C and destroys vitamin C in white radish.

The meeting of the two has caused a heavy loss of vitamin C in white radish, and its nutritional value has naturally been greatly reduced.

The above content reference: Encyclopedia - radish fleshy root black heart disease.

The above content reference: People's Daily Online - Although radishes are good, they can't be "eaten indiscriminately".

A normal radish heart should be white, but some radishes will change color for some special reasons during the growth process. So, what's going on with the turnip black heart? Why do turnips have black hearts?

Why do turnips have black hearts?

There are three main reasons for the occurrence of black skin and black heart in radish: first, soil boron deficiency; second, soil stagnant water, compaction, and hypoxia; The third is the bacterial disease caused by the infection of black rot bacteria. In addition to the presence of pathogenic bacteria, this symptom in the field is also related to improper field management and the application of unrotted organic fertilizer.

Due to the application of a large amount of unrotted organic fertilizer in the field, the soil aerobic microorganisms are active and the oxygen consumption is large, resulting in the obstruction of root tissue respiration.

Can you eat radish black heart.

It is better not to eat the radish when it is black.

The reason for the blackening of radishes may be due to the influence of planting and cultivation, or it may be caused by the deterioration of the radish itself, but whatever the reason, in order to avoid poisoning, it is not recommended to eat blackened radish.

How radish prevents black hearts.

1. Strictly carry out seed disinfection.

2. The soil should be deeply cultivated and sun-drenched, and 2000-2500 kg of fully decomposed organic fertilizer, 20-30 kg of superphosphate, and 30-40 kg of potassium sulfate should be applied per mu as base fertilizer.

3. Deep furrows and high furrows, strengthen drainage and irrigation, increase soil permeability and prevent water accumulation in the field. In addition, it is required to achieve clean water irrigation, and it is strictly forbidden to use sewage or pond water with sulfur smell for irrigation.

4. For boron-deficient fields, spray boric acid solution 1-2 times in the middle of radish growth.

5. In addition to seed disinfection, 72% agricultural streptomycin sulfate wettable powder can be sprayed 2500-3000 times at the seedling stage, once a week, 3-4 times continuously. Quicklime can also be applied appropriately, 50-100 kg per mu, which can effectively prevent the disease.

Radish recipe recommendations.

Ingredients: 250 grams of cabbage heart, 100 grams of white radish.

Method: Fry in water, add an appropriate amount of brown sugar, eat vegetables and drink soup.

Efficacy: It is used for acute rhinitis and wind-heat type: nasal congestion is mild and sometimes severe, nasal itching and heat, sneezing, yellow and thick mucus, fever, headache, sore throat, cough, phlegm, thirst and drinking, red tongue, yellowish moss, pulse number.

Boiled tofu with radish.

Ingredients: 1 cup raw radish juice, 100 grams of maltose, 500 grams of tofu.

Method: Mix and boil the three things, 1 dose per day, divided into 2 doses.

Efficacy: It can moisten the lungs and clear away heat, dissolve phlegm and relieve asthma and medium. Effective for febrile asthma.

During the storage of radish, black hearts will also appear due to insufficient oxygen supply.

Measures to prevent carrots from being black-hearted:

1. The soil must be ploughed and whitened, which can remove harmful substances such as sulfur dioxide and hydrogen sulfide in the soil. Some lime powder can be applied appropriately to promote the decomposition of harmful substances. Fertilization should be fully decomposed, otherwise harmful substances will be produced.

2. The irrigation water used should be flowing water, and avoid using unpurified sewage or pond water with sulfur smell. Strengthen drainage and irrigation management to prevent water accumulation in the field.

3. Increase boron fertilizer. Apply 1 kg of calanitarian boron per mu, apply it together with other fertilizers as base fertilizer, or spray 0 2 -0 3 boric acid solution 1-2 times in the middle of radish growth.

4. Carry out soil disinfection before planting, and spray 1 time in 72 72 times of agricultural streptomycin sulfate wettable powder or 14 copper ammonia aqueous agent 300 times in 3 7 days, and spray 3-4 times in a row.

Radish is a kind of black rot, and the cause of this disease is mainly caused by bacteria in the soil.

Black hearts are also related to the temperature, rainy weather, the number of consecutive radish plantings in the same plot, the topography and soil quality of the planting, overwatering, improper drainage, the amount of fertilizer, organic fertilizer and human influence.

Prevention and control measures for radish black heart.

1. Regulate the soil.

The organic fertilizer used should be fully decomposed, the land will be deeply turned and dried in advance, tested with pH test paper, the most suitable soil pH value of radish is 7, neutral alkaline, the state is the best, if it is lower than 7, it is best to adjust it with lime, sprinkle lime about 50 kg per mu to adjust the soil, and the acidity in the comprehensive soil can reduce the occurrence of black heart disease of radish in the future.

2. Seed treatment.

You can soak the seeds in warm soup, soak the seeds in 50 warm water for 20min, cool them in cold water immediately, remove them and dry them before sowing. The seeds can be soaked in 50 dycenum 200 times liquid for 15 min, washed and dried, and then sown. Or use seed weight of mesomycin, or 50 ml of yield increasing bacteria, to eliminate the germs in the soil around the seeds and seedlings.

3. Prevent waterlogging.

Radish is planted in the high and dry terrain, not easy to appear waterlogging in the field, the terrain is slightly low, can be cultivated in large ridges, irrigation should be used with clean irrigation, a irrigation amount can not be too large, to maintain the field is both wet and breathable, after the rain when the drainage is carried out, to prevent waterlogging, to avoid sewage irrigation.