Do I need top dressing to grow bok choy? When is top dressing better?

What fertilizer is good to chase? If you can eat green food better, it is best to use fermented various cake fertilizers and top dressing. Bean cakes, rape cakes, sesame cakes.

Top dressing with sesame cakes, the baby cabbage tastes fragrant and has a better taste. Cooking soup and stir-frying are relatively bad. But when topdressing, what fertilizer is good, which should be scientifically topdressed according to the different growth periods of Chinese cabbage, can not be generalized, can not be chased to the end because of the early stage suitable for topdressing nitrogen fertilizer, to determine the balance of fertilization according to the various growth stages of Chinese cabbage.

<> the growth period of cabbage, it is generally divided into several stages, such as germination stage, seedling stage, rosette stage, and bulbous stage. Among them, the cabbage in the germination stage, seedling stage and rosette stage can be called small cabbage. Most of the cabbage planted after the beginning of autumn is now in the middle and late stages of the seedling stage.

Do a good job in the management of transplanted seedlings first, and the transplanting seedbed should be carried out twice for seedlings. Once within 6-10 days after emergence, when the seedlings have 1 2 true leaves.

When the first seedling is carried out, the second seedling is carried out after 5 to 7 days.

Chinese cabbage is a product of leaf balls, which needs sufficient nitrogen, and when nitrogen is deficient, it grows slowly, the leaves are small and thin, and the leaf balls are not full. Chinese cabbage in different growth periods, the absorption of nitrogen, phosphorus, potassium is different, germination to rosette stage accounts for 10% of the total absorption, planting cabbage should be applied before the plantation of foot fertilizer, with the bottom fertilizer as the main, top dressing as a supplement, with organic fertilizer water top dressing slow seedling fertilizer, Chinese cabbage seedlings can be applied 1 to 2 times top dressing.

Chinese cabbage can be planted in spring and autumn, and can be planted in temperate regions, and it is not suitable for planting Chinese cabbage in areas that are too cold.

There are more plantings, and it is also the season to plant cabbage, so today we will talk about the fertilizer management of cabbage. After the Chinese cabbage is transplanted, it is necessary to water it in the morning and evening in the first few days, because the weather is still very hot at that time, and if there is a condition, you can set up a shade net on the transplanting Chinese cabbage field to prevent the sun from cooling down and avoid direct sunlight to dry the vegetable seedlings. Watering is done to allow the roots to take root quickly, as well as to cool the soil.

Top dressing is needed, old vegetable plots can be used less, new vegetable plots need to be used more, and it is best to apply potassium fertilizer, potassium fertilizer can enhance the disease resistance of cabbage and increase nutrients, top dressing before entering the rosette stage and starting to wrap the heart.

In the vegetative growth stage of general crops, top dressing is mainly nitrogen fertilizer, supplemented by phosphorus and potassium fertilizer, in the reproductive growth stage, phosphorus and potassium fertilizer are the mainstay, supplemented by nitrogen fertilizer, and the planting and production of Chinese cabbage, in order to improve the commodity quality of Chinese cabbage, we must prevent the flowering (reproductive growth) of Chinese cabbage, until the harvest, it has been a vegetative growth stage, which requires us to top dressing, mainly nitrogen fertilizer, phosphorus and potassium fertilizer, on this basis, according to the different growth stages, scientific and balanced fertilization, Meet the main nutrients required by Chinese cabbage at different growth stages.

The growth period of cabbage is relatively short, we should apply enough fertilizer before sowing, and then turn over the ground, the bottom fertilizer is best to use the rotted farmhouse fertilizer, an average of 2000 kg to 3000 kg per mu, and at the same time you can also apply some cake fertilizer and then plough, in short, the more sufficient the bottom fertilizer, the better.

Cabbage is a water-loving and fertilizer-loving plant, and after two weeks of planting, the cabbage can be topdressed, and the fermented, thin human feces can be splashed with water. The second topdressing is mainly nitrogen fertilizer, and then applied with phosphate and potassium fertilizer.

Chinese cabbage topdressing is neededIt is divided into 4 periods, namely: seedling stage, tree fertilizer, large top dressing, and core fertilizerThe fertilizer applied in each period is different, and the following is a brief introduction for you.

1. Seedling stage.

Seedling stage generally does not need top dressing, if the bottom fertilizer is insufficient, can be in the 3 4 true leaf stage, apply 10 kg of ammonium sulfate per mu, sprinkle on both sides of the seedling, and immediately water, called "seedling fertilizer".

2. "Fattening".

After the seedlings are fixed or transplanted, the fertilization method is 15 20 kg of ammonium sulfate per mu, and the ditch is applied on both sides of the ridge.

Third, large top dressing.

In the rosette stage of cabbage, apply 25 30 kg of ammonium sulfate and 10 15 kg of superphosphate per mu, apply fertilizer into the ditch or hole, and then slightly add soil to support the ridge, and then water.

Fourth, "heart fertilizer".

The fertilization should be in the middle of balling, apply 15 to 20 kg of ammonium sulfate per mu, which can be applied with water.

Note: However, for some relatively barren plots, the effect of basal fertilizer is slow, and we still have to use fertilizer. Fertilizer is applied after we are seedlings in the seedling stage, and 10-15 kg of ammonium sulfate is applied to one acre. Pay attention to our top dressing to be measured, weak seedlings more fertilization, good growth can be less top dressing or no fertilization.

The rosette stage is a critical period for the growth of cabbage, which generally takes 20-30 days, and there is a time difference between early and late maturity of varieties. At this time, cabbage not only has to grow roots but also leaves is a period of larger growth of cabbage, we should pay attention to the adequacy of water and high nitrogen fertilizer with the application of phosphorus and potassium fertilizer, you can choose the sea meal fertile compound water-soluble fertilizer, the fertilizer effect is long, and the use effect is good.

The balling period is the period that determines the yield of our cabbage, water and fertilizer should be sufficient, generally this growth cycle is longer, and the varieties are different at different times, and it takes 25-50 days. In the early stage of balling, we use 30-40 kg of ammonium nitrate and 20-30 kg of potassium sulfate, and spray three times with 1% superphosphate leaching solution during the core stage, which can effectively prevent the problem of calcium deficiency in Chinese cabbage.

Chinese cabbage generally needs to chase fertilizer twice, the first time with urea and the second time with vegetable fertilizer, about 20 days apart.

Baby bok choy belongs to one of the many varieties of cabbage and belongs to the cruciferous family.

Vegetables, biennial vegetables. Cabbage is originally a vegetable grown in winter, but in recent years, it has been improved and can be grown all year round. The soil for planting Chinese cabbage should be clay loam soil with good fertilizer and water retention, and for fertilization, it is better to apply less than many times, not more often.

So how exactly do baby cabbage top dressing?

In the case of full basal fertilizer, the top dressing of cabbage can be divided into three times, and the first top dressing is in the outer leaf growth period; The second top dressing is before the start of ball set; The third top dressing was in the bulb hypertrophy stage. In order to maintain fine fertilization, each fertilization can be subdivided into secondary fertilization according to actual needs. The amount of fertilizer applied in each stage is as follows:

Base fertilizer

Cabbage fertilization should have enough organic fertilizer as the base fertilizer, and the fertilizer is divided into simple fertilizer and compound fertilizer

Elemental fertilizer: generally apply 2000 decomposed organic fertilizer per mu, with ammonium sulfate.

15 24, superphosphate.

33 55, potassium chloride.

Compound fertilizer: generally apply 2000 decomposed organic fertilizer per mu, with 50% (10-20-20) or so compound fertilizer 25 31, superphosphate 18.

The first top dressing (outer leaf growth period): Generally, when 8 10 true leaves of Chinese cabbage, urea is applied per mu.

kilograms of potassium chloride;

The second topdressing (before the start of balling): this topdressing is the focus of the three topdressing of cabbage, with urea 8 10 per mu and potassium chloride 4 6 per mu, which can significantly improve the yield.

The third topdressing (bulbous hypertrophy stage): topdressing in the bulbous hypertrophy stage is applied urea 8 10 per mu; Potassium chloride.

Note: In China, it is easy to cause heartburn due to calcium deficiency in the white square area, and calcium nitrate can be sprayed at the early stage of balling.

Solution; Southern region.

In acidic soils, bok choy is prone to boron deficiency, so borax can be used.

The solution is sprayed on the page, which has a good preventive effect.

The above is the fertilization period of Chinese cabbage and the amount of fertilizer applied in each fertilization period.

In short, the top dressing of cabbage should follow the principle of light before and heavy at the back, and the rosette stage to the early stage of balling is the focus of fertilization, which should be focused on. Depending on the region, attention should also be paid to the disease caused by the symptoms of nutrient deficiency. In the process of fertilizing cabbage, if you have any questions, you can leave a message in the comment area and we will work together.

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.

Summary 1Before 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.

Place some well-rotted organic fertilizer, 2After the cabbage is planted, nitrogen fertilizer can be applied after the seedlings have been slowed down and about five or six leaves have grown.

3.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.

4. In addition to applying fertilizer to the soil, cabbage can also apply fertilizer to the foliage. Nitrogen fertilizer can be applied to the leaves of cabbage every 15 days or so.

5. 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.

6.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.

1. Chinese cabbage requires high soil moisture at the seedling stage.

2. The seedling stage is in the high temperature and dry season, and it is generally required to water once in 3 or 4 days, so as to achieve "three water seedlings, five water trees".

3. Chinese cabbage is generally "squatting" for 4 6 days after the seedling water, combined with top dressing and watering 1 time, and then generally watering once every 6 7 days to keep the soil moist.

4. The rosette stage of Chinese cabbage is the period when the outer leaves enter the period of rapid formation and development, and the roots are irrigated with 5 kg of rooting agent diluted 200 500 times per mu or applied with watering.

5. Chinese cabbage has entered the balling period, and the demand for fertilizer and water has reached its peak. In this period, it is necessary to reapply fertilizer, and 5 kg of Bika granular fertilizer or 2500 kg of human manure can be applied per mu, and it is generally applied to the field with water.

Fertilization should be carried out at the beginning, and then top dressing should be carried out when it grows to a certain stage, so as to ensure that the cabbage grows very well and can play a very good role.

Fertilizer should be applied every half a month or so, and each time the most fertile time should be watered in advance, so as to achieve better results, and can be more perfect, at the same time, top dressing should also add some organic fertilizer and nitrogen fertilizer and phosphorus fertilizer, because only in this way can the nutrition be balanced.

Cabbage topdressing should be done once every half a month, and the dosage is 80 kg of phosphorus and potassium fertilizer per mu.

Summary.

1. Seedling fertilizer at the seedling stage: 10 kg of urea should be applied per mu after the seedling is set to promote the growth of seedlings and make small seedlings and weak seedlings develop into strong seedlings.

2. Key topdressing at the rosette stage: topdressing kilograms of urea and 5 kg of potassium sulfate per mu at the rosette stage can promote the growth of outer leaves and lay a good foundation for the core.

3. Top dressing during the balling period: The balling period is the critical period for the formation of Chinese cabbage cores. The root system is developed to the maximum, which is the period of product organ formation. At this stage, the heart lobes grow vigorously and need to be supplied with sufficient nutrients. High nitrogen, high potassium and low phosphorus fast-acting compound fertilizer can be selected, with a dosage of about 15 kg per mu.

When does cabbage start topdressing? What kind of fertilizer do you generally chase? How much does an acre of land cost?

1. Seedling fertilizer at the seedling stage: 10 kg of urea should be applied per mu after the seedling is set to promote the growth of seedlings and make small seedlings and weak seedlings develop into strong seedlings. Second, the rosette period of key top dressing:

Topdressing of kilograms of urea and 5 kilograms of potassium sulfate per mu at the rosette stage can promote the growth of outer leaves and lay a good foundation for the core. 3. Top dressing during the balling period: The balling period is the critical period for the formation of Chinese cabbage cores.

The root system is developed to the maximum, which is the period of product organ formation. At this stage, the heart lobes grow vigorously and need to be supplied with sufficient nutrients. High nitrogen, high potassium and low phosphorus fast-acting compound fertilizer can be selected, with a dosage of about 15 kg per mu.

Fourth, top application of micro-fertilizer: Chinese cabbage is a calcium-loving crop, such as calcium deficiency is easy to cause dry heartburn, seriously affecting the quality of Chinese cabbage. However, soil calcium application is often not effective, and foliar supplementation should be taken.

It can be sprayed with calcium chloride or calcium nitrate foliar spray, sprayed once every 7 days, and sprayed 2 or 3 times in a row to be effective. Due to the poor mobility of calcium in plants, the addition of naphthalene acetic acid when spraying calcium can improve calcium absorption. Chinese cabbage is also a crop that requires more boron, and boron fertilizer should be applied to boron-deficient soils.

Boron fertilizer can be used as base fertilizer, apply 1 5 kg of borax per hectare, mix well with other fertilizers, and apply it to the soil. It can also be sprayed with borax solution from the rosette stage to the balling stage, sprayed once every 6 7 days, and sprayed twice in a row, with a better effect.