What factors are related to cabbage seedlings?

If it is because of frequent watering or insufficient soil particles, the root system is not breathable enough, the performance is long, and the risk is that it will be easier to stuff the root system in the summer high temperature, and it will turn into water or black rot. This also occurs if the cabbage is planted too densely when the cabbage seedlings are raised. Originally, a seedling box could grow 50 seedlings, but you want to increase the capacity to 100 seedlings.

They compete with each other for space, of course, crowded, and only grow tall and not thick.

<> cabbage is a cool-loving crop, after sowing to the temperature before the unearthing temperature should be high, when 70% of the seedlings are unearthed, it is necessary to appropriately reduce the temperature during the day and at night, keep 20 during the day, reduce 3 5 at night, can prevent the hypocotyl of cabbage seedlings from growing vigorously and form tall seedlings, small cabbage seedlings need not many nutrients, especially the balcony planted in the plate, the small cabbage in the box, if the amount of nitrogen fertilizer is too much, coupled with watering too often, it is easy to make the seedlings grow, and form tall seedlings. Organic fertilizer can be appropriately increased.

Sufficient light provides photosynthesis of leaves.

This produces nutrients to provide vegetable seedlings to grow. At the same time, it can also provide nutrients for roots, stems, branches and leaves, which is conducive to the growth and reproduction of seedlings, and when the leaves carry out gas exchange during the day, the leaves absorb carbon dioxide.

When planting cabbage, you can't pursue early-maturing and early-yielding varieties too much, in fact, many varieties such as "Zaoxin White" and "Autumn Early 55" have cold resistance and crude fiber.

Not all places are suitable for growing early-maturing varieties of cabbage.

Keep ventilation and light through. It is easier to find when planting in the garden, and the vegetables sown at the same time grow slender in places with no sunlight or little sunlight, while vegetables in sunny places grow stout, so it is necessary to ensure ventilation and light conditions. The density is too high.

When the sowing density is too large and the seedling emergence rate is very high, and there is no time for seedlings, the plants compete with each other for sunlight, water and nutrients, and the lower leaves are easy to be infected with diseases and die, and thin seedlings will appear. Keeping the soil moist in the early stage of Chinese cabbage seedling emergence is conducive to seed germination, but after the seeds germinate, it is necessary to adjust the watering frequency and amount appropriately. The frequency of watering is when the soil is dry and when to water.

It is related to several factors. May be 1Insufficient light:

Seedling trays are often placed in places with no visible light, lack of sunlight, dark and damp. 2.The temperature is too high at night:

Cabbage is a cool-loving crop, and the temperature should be high after sowing to before unearthing, and the temperature should be appropriately lowered after unearthing. 3.Excessive moisture:

Too much watering, too much soil softness and humidity, will cause soil seedlings to grow.

It is related to temperature and humidity, moisture, light, seedling density and fertilizer use. Temperature and humidity are not suitable, moisture is too large, light is insufficient, seedling density is too high, poor ventilation between seedlings, and unreasonable fertilizer use, such as nitrogen fertilizer is too high, etc., will cause crop seedlings to appear tall seedlings.

It may be related to pests and diseases, it may also be that the branches and leaves are not cleaned in time, and they are not watered regularly, I think it must have something to do with these factors.

The first light is not enough, which will cause him to go all the way, the second is too much watering, the third is not the right nutrition, and the fourth is not good ventilation. Fifth, it may be that you are not taking care of yourself enough.

It is related to temperature and soil quality, and it is also related to the management of water and fertilizer, and it is also related to the cultivation technology.

It may be because of the soil, and if this happens often, then a simple change in the fertility of the soil should be made to prevent this from happening again.

The temperature suitable for the germination of cabbage seeds is 20 25, and the weak growth is mostly caused by insufficient moisture and low temperature. However, cabbage seedlings only grow tall and do not grow leaves, which may be caused by excessive fertilizer and water and high temperature. Normally, cabbage seeds will basically emerge within 1 week after sowing, and to improve the situation of only growing tall and not growing leaves, we must first maintain a windy and light-permeable environment, and do not fertilize.

Many plastic sheds do not pay attention to the opening of the shed for ventilation, and there will be no leaves, and it is necessary to keep the cabbage seedlings at least 2 hours of sunshine every day. There is also a part of the vegetable seedlings that can be properly pulled out, keeping a distance of about 5 cm, and it is not suitable to sow too densely.

He only grows tall and does not grow leaves, because he does not have enough light after the seedlings emerge, the temperature is too high at night, there is too much water and nitrogen fertilizer, or because the sowing is too dense and the seedling emergence time is different.

It is caused by a lack of fertilizer, and it is necessary to give it a moderate amount of fertilizer according to the needs of the cabbage, and then it will grow leaves.

Planting Chinese cabbage has a stunted growth situation, a long time will reduce the yield of Chinese cabbage, the quality of Chinese cabbage, etc., and then cause the value of the commodity to decrease, with the help of planting Chinese cabbage to enhance the economic benefits of the pot friends, there is no doubt that the heart will be very anxious, slow seedlings, growth retardation, and even the occurrence of dead seedlings, what should I do?

1. There is a problem with the choice of soil layer, Chinese cabbage has roots, likes to grow in the field with loose and rich and good air permeability, so it should be selected when choosing the Chinese cabbage field, with high soil organic matter, soil fertility more than 5% is the best, it is very easy to irrigate, and after heavy rain, it can immediately drain the pipe to carry out planting in the field. The rhizomes of Chinese cabbage do not go deep into the soil like other crops, most of the rhizomes are spread all over the 20 cm of cultivated soil, and the chemical fertilizer in the cultivated soil is abundant, and the water is suitable, so that the Chinese cabbage grows fast. In order to achieve high quality and yield increase in Chinese cabbage, it is best to use organic fertilizer as the base fertilizer, 1 mu of land 3 5 square will be better, and to cooperate with each other with nitrogen, phosphorus and potassium three 15 controlled-release fertilizer 50 kg.

35, 40 kg of high-quality phosphate fertilizer. Paving the way for transplanting Chinese cabbage.

2, moderate planting, Chinese cabbage belongs to the vegetables and fruits that like damp and cold climate, Chinese cabbage growth period, the temperature exceeds 28 degrees, the evening temperature is less than 13 degrees, the growth of seedlings will be very bad, the growth rate slows down or even stagnates, just transplanted cabbage seedlings, do not like strong light, strong light will cause too much water shortage of seedlings leaves, harm the slow seedlings of Chinese cabbage. It is best to choose to carry out Chinese cabbage planting in the evening, or it is inconvenient to cover it with sunscreen nets to reduce the transpiration of Chinese cabbage leaves.

3. Reduce the transpiration of cabbage seedlings leaves, when transplanting Chinese cabbage, it is best to choose the way of cutting, and cut all the outer leaves of Chinese cabbage by 40% 50%, after a few days, cabbage seedlings will enter the normal growth period, if not to pinch the leaves, when the fixed value, the transpiration of the leaves causes too much water for the whole tree, which harms the survival rate of Chinese cabbage.

4. Hurt the roots too much, newly planted cabbage seedlings, not only to reduce leaf transpiration, but also to improve the survival rate, when transplanting large trees, to prevent rude pulling, as far as possible without damaging the roots, Kakashi planting, plus a short cut off part of the large leaves, watering enough transplanting water. Most of the cabbage seedlings are stable before they die. In order to better activate the rhizomes of Chinese cabbage, 1 2 days before the planting of Chinese cabbage seedlings, to slow down the survival of Chinese cabbage seedlings, and carry out leaf spraying of potassium dihydrogen phosphate + brassinin + methyl tobuzine 800 times.

It has the effect of disease prevention and production increase.

This is due to the fact that the transplanting soil may not be suitable for the growth of cabbage seedlings, so it will lead to slow growth.

It may be that the transplanted land is not nutritious, or it may be that the water is relatively small, so it will grow very slowly, you can turn the soil frequently, so that the soil is more absorbent and breathable, so that the cabbage should grow faster.

The lack of nutrients and the lack of moisture in the soil are not conducive to the growth of cabbage.

Hello, the Chinese cabbage planted is not strong and can continue to grow after the growth period。We can help the growth of Chinese cabbage in terms of water, fertilizer, light, etc.

First, apply sufficient base fertilizer

Reasonable top dressing, cabbage likes loose and fertile, organic matter-rich soil, there are many friends, ignore the application of organic fertilizer, and replace it with chemical fertilizer.

But if you want cabbage to grow well, yield and quality is high, improve the competition of commodities, and apply fully rotted farmhouse fertilizer, it is really an essential step, because farmhouse fertilizer is rich in organic matter, fertilizer effect is stable, fertilizer effect is long, this is the advantage of organic fertilizer, farmhouse fertilizer as a base fertilizer once applied, and with some chemical fertilizer.

Second, the use of foliar fertilizer

During the growth period of cabbage, it is only necessary to top dressing once in the rosette stage of Chinese cabbage, and then, at an interval of 10 to 15 days, potassium dihydrogen phosphate is applied along the water.

Potassium dihydrogen phosphate can be used to spray foliar fertilizer to improve the absorption and utilization rate of cabbage.

Sometimes Chinese cabbage shows heartburn.

The main thing is the lack of calcium.

As a result, through the appropriate supplementation of calcium fertilizer, the situation will be improved, calcium in the growth of cabbage shed has an important position, only by the application of nitrogen, phosphorus and potassium.

fertilizers, which are still not good for the growth of cabbage. Calcium supplementation can be done in the form of foliar fertilizers. Foliar fertilizer generally chooses potassium dihydrogen phosphate foliar fertilizer + marine fertile chelated calcium fertilizer.

3. Reasonable fertilization methods

Before planting Streptophyte Chinese cabbage, the land was fertilized, and more than 3,000 kg of fully decomposed farmhouse fertilizer and 80 kg of 45% nitrogen, phosphorus and potassium controlled-release fertilizer were applied per mu, which contained a variety of medium and trace elements.

The appropriate amount of fertilizer.

Cabbage into the cluster stage, per mu of nitrogen, phosphorus and potassium compound fertilizer about 30 kg, after the top dressing, try to choose the water flushing and spraying foliar fertilizer, because after the cabbage ridge sealing, and then ditch the fertilizer is easy to hurt the roots, causing some diseases such as soft rot.

After the cabbage emerges, it is necessary to apply water frequently to ensure that the soil is moist; Regular application of fertilizer to promote seedling growth; Clean up weeds regularly to ensure that nutrients are not taken away. In addition, it is necessary to check whether there are long insects in time and remove the diseased leaves in time.

1. Watering in time.

Water is a necessary substance for the growth of Chinese cabbage, before sowing, to ensure that the soil water content is sufficient, which is conducive to the germination of seeds. If the soil is moist, the seeds of the cabbage will break through the soil in about 3-4 days. If you encounter a hot and dry environment, you must water it in time to improve the moisture content of the soil.

Improve the water absorption of cabbage and promote growth, but the water should not be too much, otherwise it is easy to waterlog, affecting the growth, so do a good job of drainage in rainy weather.

2. Reasonable top dressing.

Chinese cabbage is a kind of fertilizer-loving vegetables, which need more nutrients in the process of planting and growing, and we should top dressing in time according to the growth stage of Chinese cabbage and the fertilizer content of the soil. Prevent the lack of nutrients and malnutrition of Chinese cabbage, which will lead to a decrease in survival rate and reduce yield. Fertilization can be carried out with watering work appropriately, and the method of watering fertilizer can be sprayed, which can not only ensure comprehensive and uniform fertilization, but also will not affect the quality of cabbage.

3. Cultivating soil.

Bok choy has a strong growth ability and a relatively high yield, so nutrient absorption is very critical. Soil environment is the key to the nutrient absorption of Chinese cabbage, and proper soil cultivation can improve soil permeability, improve soil fertilizer absorption, and promote nutrient absorption of roots. It is very beneficial to the growth of Chinese cabbage, and can also reduce the incidence of pests and diseases, and improve the yield of Chinese cabbage.

Summary. The cabbage sprouted two small leaves, withered and died; There are many reasons. For example, the influence of herbicide soil residues on previous crops, or high temperature, rainy weather, insufficient light, and poor seedling resistance after sowing will lead to the wilting and death of seedlings.

What is the reason why the two leaves of cabbage do not grow after they emerge?

The cabbage sprouted two small leaves, withered and died; There are many reasons. For example, the influence of herbicide soil residues on previous crops, or high temperature, rainy weather, insufficient light, and poor seedling resistance after sowing will lead to the wilting and death of seedlings.

First, choose excellent varieties. There are many varieties of Chinese cabbage, which can be divided into three basic ecological types: straight type, original head type and oval type, but due to the reasons of the growing season, the middle and late maturing varieties that are resistant to disease, cold-resistant, high-yield and storable must be selected in the selection. Second, the sowing time.

In general, it is advisable to sow 3 to 5 days before and after the beginning of autumn, and in high temperature years, it can be postponed to mid-August. Late-maturing varieties with disease resistance and long growth period can be sown early, and medium-maturing varieties with short growth period can be sown a few days late.

Control methods (1) correctly select the sowing date, according to the local climate, according to local conditions to determine the appropriate sowing date, should not be sowing too early. In case of high temperature weather for several consecutive days after sowing, it should be watered in time to reduce the ground temperature. (2) In the absence of rain, generally water once on the day of sowing or the next day to ensure that the ridge surface is wet, and water the second time on the third day of sowing to promote most of the young shoots to emerge.

3) In southern China, cabbage fields should not be covered with straw with sheath blight, and it is not advisable to plant Chinese cabbage in rice fields with severe sheath blight. (4) Chinese cabbage can not be cropped continuously, nor can it be rotated with other cruciferous vegetables, which is one of the important measures to prevent pests and diseases;Crop rotation of more than 3 years can be implemented if conditions permit.

One is yellow, that is, too much water causes the soil to accumulate water for a long time, poor air permeability and even some fibrous roots rot. It shows that the young leaves are dark yellow and dull, and the new shoots are shriveled. The second is fat yellow, that is, fat, which is manifested as the tip of the old leaves turning yellow and falling off, and the new leaves are thick and shiny, but generally uneven and unstretched.

You can sprinkle a layer of radish seeds and pull them out after a few days of emergence to consume nutrients. The third is dry yellow, due to long-term lack of watering or dehydration, although the new leaves are normal in color, the lower leaves gradually dry and yellow fall off and age. Fourth, it is alkali yellow, and the water quality in the north is alkaline, and the leaves gradually fade, turn yellow or even fall off.

The easiest way to do this is to pour fermented rice washing water or rainwater.

It didn't die, it didn't turn yellow, it just didn't grow.

That's a matter of variety.

How to deal with it. For example, fertilize and drench.

What kind of fertilizer to apply. It's too small.

I don't know, but you're going to have to go to the fertilizer store and ask