When to fertilize black leaf cabbage after planting?

Hello! After the cabbage is planted and survived, it can be topdressed. Chase 15% decomposing human feces and urine every 3-4 days, with a dosage of 4-5 quintals per mu.

Look at the weather and soil dry and wet conditions, the human feces and urine are applied with water, and the concentration of fertilizer should be increased when the cabbage enters the rosette stage, usually every 5-7 days, chasing 30% of the decaying human feces.

Cabbage seedlings should be lightly watered, frequently splashed and moisturized. During the rosette, intermittent watering, see dry and wet, and properly train seedlings. The water requirement is higher when the ball is set, and furrow irrigation can be used when the soil is dry, and irrigation should be carried out in the evening or after the ground temperature decreases at night.

It should be poured slowly, do not fill the furrow, after the water seeps into the soil, the remaining water should be discharged at the very least. There is no water accumulation in the ditch, no water on the furrow surface, and no water shortage in the root system. From the end of the rosette stage to the middle of bulb, keeping the soil moist is one of the keys to achieving a good yield of cabbage.

Hope, thank you.

When the vegetables grow to 3-4 leaves, the fertilizer that has been dried and refined is evenly sprinkled into the vegetable field, and watered in time. For planting vegetables with larger row spacing and more concentrated root system, you can open a ditch strip to apply top dressing, do not break the root system when ditching, and water it in time after covering it with soil. For vegetables with large row spacing, topdressing can be used.

When using fertilizer on the land for organic vegetable planting, vegetable planting and soil fertility should be planted simultaneously. The ratio of animal and plant fertilizers should be mastered at 1 1 as well. Generally, 3000-4000 kg of organic fertilizer is applied per mu, and 100 kg of organic fertilizer is applied.

80% of the total amount of fertilizer was used as the base fertilizer, and the fertilizer was evenly mixed into the tillage layer in combination with the cultivated land to facilitate the root absorption.

Extended Materials. The base fertilizer must be rotten. The base fertilizer is generally based on delayed farm organic fertilizer such as manure and compost.

Apply vegetables into the soil before sowing or planting, in order to meet the needs of the continuous growth of vegetables. These farmyard fertilizers not only contain a variety of elements needed for vegetables, but also provide a large amount of organic matter to the soil, which can improve the soil well.

The leaves of vegetables are blackened after top dressing, indicating that the fertilizer is applied too much, which may produce fertilizer damage, and should be flushed in the vegetable garden in time to reduce the impact of fertilizer damage.

Vegetables, especially leafy vegetables, should be applied with fertile leaf foliar fertilizer during the growth period to directly supplement the nutrients of the foliar surface and promote the better growth of vegetables.

If the leaf color is too dark, there will be obstacles in nutrient transport, root growth, fruit expansion, overall plant growth, and fruit coloration. Flowering will also slow down. It has a direct impact on the final yield.

Therefore, at this time, the night temperature should be appropriately increased, adjusted to the range suitable for vegetables, and the control of Wang should be moderate, and the excessive use of drugs or fertilizers should not be used. Reduce the use of hormone drugs or fertilizers, use biological enzymes with nitrogen to promote growth, accelerate metabolism, metabolize harmful substances, and restore the normal growth of plants.

Extended Materials. Recently, many farmers have responded that this year is planting a lot of vegetable varieties, and the upper leaves of the seedlings have turned black and green recently.

It doesn't matter if it's a cucumber or a tomato, an eggplant or a pepper. The color of the leaves is normal and the color is bright green. The darkening of the leaves is due to carbohydrate accumulation.

The leaves combine water and fertilizer with light and carbon dioxide to produce photosynthetic substances, which are then distributed to the cells of the plant. If the temperature difference between day and night is too large, the temperature at night is too low, the daytime sunlight is sufficient, or the over-control of the exuberance, the nutrients produced during the day cannot be transported normally, and will accumulate in the leaves, causing the leaves to become dark and black. There is also the use of foliar fertilizer or fungicidal drug hormones exceeding the standard, or the hormones contained in the fertilization show a hormone superposition effect on the leaves, resulting in premature aging of the upper leaves, and the leaves will also appear black and green.

After the vegetable top dressing, the leaves are blackened, too much fertilizer may be applied, and the fertilizer effect is too heavy, which has an impact on the growth of vegetables.

The yellowing of vegetable leaves is due to problems with the root system, such as low temperature, inhibition of water and fertilizer, and yellowing of leaves. In this case, the yellow leaves, no matter how much fertilizer is used, can not change the yellow leaves. Some are serious and yellow leaves, such as yellowing virus disease.

There is also a lack of nutrients and yellow leaves, a more common situation, to supplement fertilizer. In the case of a strong root system and few pests and diseases, the yellowing of the leaves should consider whether the fertilizer formula is appropriate. Physiological deficiency is also regular, the lower old leaves are yellow, generally lack a large number of elements, and the growers say that the upper leaves are yellow, which is the lack of medium and trace elements.

1. Some farmers are accustomed to water-soluble fertilizer when fertilizing, and only pay attention to the content of a large number of elements, that is, nitrogen, phosphorus and potassium can meet the growth of vegetables, but the types of medium and trace elements contained in water-soluble fertilizer are few, and there may only be two or three trace elements. If trace elements are used in fertilizer, but the acidity and alkalinity imbalance in the soil or substrate will also inhibit the absorption of trace elements by the roots.

2. There are also some farmers who supplement trace elements, and are accustomed to using foliar fertilizer spraying, using 30 grams of water for a bucket, in fact, this plays a very small role, and the leaves are still yellow. Some farmers are worried that the root application of trace elements will be low in utilization, so they use foliar sprays instead. This fertilization method is also not scientific, the roots can not absorb nutrients, the growth and development is poor, the later stage of premature aging, and the leaves absorb limited nutrients, can only alleviate the symptoms of nutrient deficiency, so, can not replace the root fertilization.

Yellow leaves due to lack of trace elements are not uncommon in the process of growing vegetables. The best solution is that farmers should take the initiative to supplement trace elements, and they are seven trace elements, so as to effectively prevent the occurrence of yellow leaves at the growth point.

When we use water-soluble fertilizer, add a little trace element fertilizer, which contains seven elements, and the nutrients are comprehensive, and it will not affect the growth of the root system. For example, ten kilograms of water-soluble fertilizer can be added with 100 grams of trace elements, which are added every time fertilizer is applied. However, it should be noted that when using a variety of trace elements, it is necessary to choose chelated fertilizers, which are stable in nature and prevent reactions with other fertilizers and affect fertilizer efficiency.

Soil preparation and fertilization: deep ploughing of the soil for weeding, and application of sufficient organic fertilizer to the soil, and then exposure to the sun for disinfection. Sowing and planting:

Spread the planting evenly on the surface of the soil, and water and moisturize after covering the soil. Field management: Urea is applied every 10 to 15 days after colonization.

I'm still a little confused, can you be more detailed?

The soil is deeply cultivated and weededed, and a sufficient amount of organic fertilizer is applied to the soil, and then exposed to the sun to disinfect. Sowing and planting: Spread the planting evenly on the surface of the soil, and water and moisturize after covering the soil.

Field management: Urea is applied every 10 to 15 days after colonization.

Cabbage is most suitable for fertilization at the seedling stage.

Before planting, cabbage must first apply sufficient base fertilizer, also known as base fertilizer. It is about 50 centimeters below the roots of the cabbage soil. Put some well-rotted organic fertilizer, and after the cabbage is planted, after the seedlings are slowed down and about five or six leaves have grown, nitrogen fertilizer can be applied.

The cabbage grows gradually. At that time, the temperature also gradually decreased. At this time, an appropriate amount of potassium fertilizer can be applied.

A fertilizer has the effect of strengthening roots, which can kill the roots and is huge, which is convenient for absorbing nutrients in the soil, and potassium fertilizer is also available. Helps plants withstand the cold. In addition to applying fertilizer to the soil, cabbage can also be used to apply fertilizer to the foliage.

Nitrogen fertilizer can be applied to the leaves of cabbage every 15 days or so.

By around October, the cabbage has grown into a ball. At this time, it is suitable to apply some well-rotted organic fertilizer, which is rich in nutrients very comprehensive and sufficient. By the end of November, the cabbage was already very large.

At this time, we need to clean up the yellow leaves on the outside. for easy ventilation. Cabbage is also in the harvest season.

The ratio of nitrogen, phosphorus and potassium fertilizer required by cabbage in the whole growth period is 2:1:2, which means that when planting cabbage, the amount of nitrogen and potassium required is the highest, and of course, phosphate fertilizer is also indispensable.

The second fertilization is when the heart leaves are covered, and 15 kg of urea is used, but the potassium sulfate needs to be appropriately reduced.

Preferably at 15 kg to 18 kg. When topdressing, as long as you pay attention to these two stages, it is enough to use phosphate fertilizer, cabbage has the highest demand for phosphorus at the seedling stage, so it is best to use superphosphate or calcium, magnesium and phosphorus fertilizer when making base fertilizer, as long as these points are done, there should be no problem with planting cabbage with high yield.

Temperature and humidity are not suitable: When the temperature is -11, it is not only easy to cause the cabbage not to grow, but also to make the cabbage to be frozen at low temperature, and if the water is insufficient or too much, it may also cause the cabbage not to grow.

Lack of light: Cabbage needs enough nutrients to grow during the growth period, and sufficient sunlight can make it better photosynthesize, so that it grows better, which may cause cabbage not to grow.

How to prevent cabbage from not growing.

1. Prevention and control methods.

1) Provide a suitable temperature for cabbage, during its growth period, it is generally necessary to keep the temperature at 10-22, and at the same time, it is necessary to water reasonably to ensure that the soil is moist, but there should be no stagnant water.

2) Ensure that cabbage has enough light to absorb, and reasonable fertilization, base fertilizer generally needs to be based on organic fertilizer, and when topdressing, nitrogen can generally be the mainstay, for some relatively poor and insufficient fertility fields, after the cabbage seedlings are applied in a timely manner to raise seedling fertilizer or Trim water-soluble fertilizer, top dressing can generally use urea.

2. It is suitable for the environment of cabbage growth.

1) It is suitable for planting cabbage in sandy loam soil with deep soil, fertile and soft soil, high organic matter content, and is not suitable for planting in soil with excessive alkalinity, and the pH of the soil is suitable for neutral or weak acidity.

2) Generally, it is necessary to ensure that the cabbage has sufficient water in order to make photosynthesis go smoothly, so it is required that the plot where the cabbage is cultivated must have good irrigation conditions and drainage system, which can not only ensure the water demand of the cabbage, but also ensure that the stagnant water in the field can be discharged after the rain.

The planting time of Chinese cabbage varies greatly depending on the region and the season. This article introduces the efficient planting technology of Chinese cabbage in autumn in northern China. Seeds: Vegetable seeds are sold in various counties and cities.

In mid to late September, it is too early for a lot of insects, so if you have a balcony, you can do it all year round.