How to do foliar fertilization of Chinese cabbage?

The use of Chinese cabbage foliar fertilizer is generally carried out during the rosette period, spraying once every 7 10 days, a total of 3 4 times. In order to improve the effect when spraying, a small amount of laundry detergent can be added to the fertilizer.

Make adhesives. In addition, it is best to choose a sunny day without wind, after 4 p.m. Foliar fertilizers commonly used are: urea.

100 times liquid, Bika potassium dihydrogen phosphate.

100 times liquid, boron fertilizer + urea, etc. Foliar fertilization can also be mixed with pesticides, such as 200 times of urea and 700 times of ammonium desen, which can improve the control effect of downy mildew.

Foliar fertilization of Chinese cabbage is mostly sprayed on the leaf surface of Chinese cabbage with a sprayer. Commonly used fertilizers are; Potassium dihydrogen phosphate, urea, etc.

Spray sugar alcohol calcium + potassium dihydrogen phosphate solution regularly.

The biggest reason why Chinese cabbage is dry heartburn, the biggest reason is calcium deficiency, if we often use chemical fertilizers, it is more likely to have calcium deficiency, so as to dry heartburn, therefore, before we plant Chinese cabbage, we need to apply enough farm fertilizer to the vegetable field, add various nutrients to the soil, and the follow-up Chinese cabbage is not easy to lack calcium dry heartburn.

First, when fertilizing cabbage, the use of nitrogen fertilizer can increase the weight of leaf bulbs, but when nitrogen fertilizer is excessive, it affects the absorption of other elements, and the quality and disease resistance will also be reduced. Small black spots on the leaves are also a sign of excess nitrogen fertilizer.

Second, cabbage needs the most potassium fertilizer at the bulboding stage, followed by nitrogen as the second, calcium as the third, and phosphorus as the fourth. Supplemental potassium fertilizer is also a trick to increase the yield of cabbage. When potassium is deficient, the nutrients in the outer leaf cannot be transported to the heart leaf, and the inner leaf of the leaf bulb becomes smaller, and the core is not full, and the yield is seriously reduced.

When potassium is deficient, the ability of cabbage to resist soft rot and downy mildew decreases.

Therefore, reasonable fertilization has a great impact on the yield and quality of cabbage. If there is an increase in diseases and loose leaf bulbs, farmers should pay attention to the balanced application of nitrogen and potassium, not bias the application of one element, change the fertilization formula, promote the growth of leaf bulbs, and improve the quality.

In the crusting stage of cabbage, the nutrients absorbed are the most. When topdressing, the amount of potassium fertilizer should be increased. 30 kg of urea per mu, plus 20 kg of potassium sulfate, or 3 balanced compound fertilizers of 15, 30 kg per mu.

The focus of top dressing is in the early stage of cabbage balling to promote the growth of leaf balls, and the top dressing should be early in the balling stage. In the late stage of balling, the effect of increasing production cannot be achieved.

During the growing period of Chinese cabbage, how to fertilize skillfully? Chinese cabbage is the most common vegetable in our lives, with many varieties, good quality, good taste and rich nutrition, cheap, cultivation area and yield are in the first place among vegetables, in recent years, with the continuous improvement of production level, it has achieved the whole year. However, as a spring Chinese cabbage, if the fertilization management measures in each growth period are improper, it will cause problems such as low yield and quality decline.

Chinese cabbage is a high fertilizer crop, the demand for nitrogen is the most sensitive, nitrogen deficiency will affect growth, nitrogen sufficiency can promote chlorophyll formation and leaf ball growth, increase the number of leaves and leaf area to improve yield, excessive nitrogen will cause leaf growth to make the leaves thinner, water content increases and quality declines. The demand for phosphorus in Chinese cabbage is not very large, and sufficient phosphorus can promote root growth and leaf primordium differentiation, promote the growth of outer leaves, and increase the differentiation of bulbs. Chinese cabbage has a large demand for potassium, which can promote the differentiation and growth of leaf balls, enrich the core, increase the nutrient content in the leaves, and improve the quality of Chinese cabbage.

Let me share some tips for fertilization. 1. Apply plantar fertilizer. First of all, it is necessary to apply foot fertilizer, generally not less than 5000 kg of manure per mu, 60% of the manure is evenly sprinkled in the ground after deep ploughing into the soil, and then the remaining 40% of the manure is sprinkled on the ground before the ground, and then ridged.

Superphosphate or formula fertilizer can be applied together with strip application when applying manure, with a dosage of 50-70 kg per mu. 2. Apply seedling fertilizer. In order to ensure that the nutrients in the seedling stage are sufficient, the fast-acting fertilizer should be applied as "seedling fertilizer", 5-8 kg of ammonium sulfate per mu can be used before the seeding, or 10 kg of Chinese cabbage fertilizer is applied into the sowing hole, ditch and then fully mixed with the soil, and then watered for sowing.

3. Pay attention to plant fertilizer. Generally, 800-1500 kg of human manure, 50-100 kg of plant ash, or 10-15 kg of ammonium nitrate, 7-10 kg of phosphorus and potassium fertilizer are applied per mu. If the direct seeding method is adopted, fertilizer should be applied after opening a small furrow of 8-10 cm on the edge of the plant and covering with fine soil.

Chinese cabbage should be transplanted first by ditching and then applying fertilizer, and mixed with the soil before transplanting seedlings. If the Chinese cabbage grows in the late rosette, it is necessary to take the measure of "squatting seedlings". 4. Reapply pelletizing fertilizer.

Apply bulbling fertilizer 5-6 days before wrapping the core, and it is better to choose a fertilizer with long-lasting fertilizer effect, especially to increase potassium fertilizer. 15-20 kg of Chinese cabbage fertilizer can be applied per mu, and it is best to mix chemical fertilizer with rotted manure and apply it. 5. Spray foliar fertilizer.

Chinese cabbage is sensitive to calcium, and if calcium deficiency can cause heartburn, spraying calcium chloride solution or calcium nitrate solution can effectively reduce the incidence. At the same time, combined with pest control, urea or potassium dihydrogen phosphate solution can be sprayed at the beginning of balling. The above is mine, I hope it helps you.

The best thing to do is to apply thin fertilizer diligently, every four to five days, preferably with fermented organic fertilizer.

According to the growth cycle of the Chinese cabbage, fertilize the Chinese cabbage, and remember to fertilize again when the Chinese cabbage is about to ripen.

Fertilize according to the growth of the Chinese cabbage, and then apply fertilizer when the Chinese cabbage is about to ripen, so that the Chinese cabbage can grow well.

During the growth period of Chinese cabbage, first apply some nitrogen, phosphorus and potassium compound fertilizer at the root position of Chinese cabbage. After a day, the Chinese cabbage is poured with its own fermented liquid fertilizer, and the Chinese cabbage grows very well.

Under the premise of applying sufficient base fertilizer, the general old vegetable garden, the soil layer fertilizer rate is very high, and the organic fertilizer used can be appropriate, if it is on the new vegetable ground, the fertilizer effect of the soil layer will be insufficient, we should reapply organic fertilizer, or phosphorus and potassium fertilizer mixed as base fertilizer. Until the leaves of Chinese cabbage grow out, the main stem grows to about ten centimeters, under the premise that the base fertilizer is not enough or no fertilizer is applied, it can be a little seedling fertilizer, 1 acre of land can use six kg of urea, to promote the growth and development of Chinese cabbage, the process of top dressing should be key to apply small seedlings, weak seedlings, and promote its production of strong seedlings. The absorption of nutrients in each link of cabbage is different, <>

Seedling stage, take base fertilizer as an example, the ratio of digestion and absorption is around 6%, and then enter the rosette stage, at this time the cabbage grows and develops rapidly, so the digestion and absorption of nutrients is accelerated, and the proportion of digestion and absorption of base fertilizer reaches about 40%, and the balling period and the second half of the period, the proportion of base fertilizer digestion and absorption is more than 50%, so this time is the critical period of Chinese cabbage production and top dressing cabbage is easy to get sick, and it is best to carry out grain crops and vegetables and fruits in rotation. When ploughing, sprinkle 100-150kg of lime powder on 1 acre. Chinese cabbage grows and develops rapidly, and the amount of chemical fertilizer is large, and the base fertilizer of Chinese cabbage is dominated by organic fertilizer with sufficient manure, which is <>

Mix nitrogen, phosphorus and potassium fertilizers, and apply foot fertilizer. Cabbage has seed live broadcast room and transplanted seedlings, and the fast-acting fertilizer can be properly topdressed after the Chinese cabbage seedlings are replenished to ensure that the Chinese cabbage seedlings have sufficient nutrition. After the cabbage is planted, it is necessary to fertilize gradually, and apply manure every 3 to 4 days.

After the Chinese cabbage enters the ball, the Chinese cabbage digests and absorbs more zinc, which can promote the light and efficacy of the leaves, and can ensure that the leaf balls are rounded, and the edge of the leaf will turn yellow if the zinc element is not enough. Generally, in the seedling promotion stage, we carry out fertilization after the Chinese cabbage budding period. Because the planted Chinese cabbage inevitably has an uneven condition, it is dense and must be treated with seedlings.

At the end of seedling replenishment, top dressing should be carried out immediately to promote seedling fertilizer. It is best to maintain the soft soil layer before top dressing, and the seedling fertilizer is generally watered with urea. Here's how:

During irrigation, water is sprinkled into the inlet of the running water and poured into the cabbage ditch. The advantage of this is that the roots are not damaged, and the urea can be melted efficiently and quickly, making the fertilizer effective. Sufficient fertilization and watering is important to ensure the healthy growth of rosette leaves, but at the same time, it is necessary to pay attention to avoid the growth of rosette leaves and cause the delay of Chinese cabbage balling.

If there is a vigorous growth condition in the middle and late stages of the rosette, it is necessary to carry out squatting seedlings.

In the later stage, it is generally not fertilized, which is easy to cause plant decay, which is determined according to the specific plant growth situation.

After planting Chinese cabbage, it is generally necessary to fertilize on the same day, and then fertilize again after it grows, and then wait for about half a month to fertilize again.

It is best to choose well-rotted farmhouse fertilizer, and sometimes ternary compound fertilizer is also used, so that trace elements can be supplemented in time and nutrition can be supplemented in time.

1. Due to the long growth period and high yield of Chinese cabbage, the application of base fertilizer is particularly critical, and a large amount of organic fertilizer and a small amount of chemical fertilizer should be mixed in the bottom fertilizer. Organic fertilizer requires farmhouse fertilizer that is fully decomposed and fermented.

Bottom fertilizer application method: organic fertilizer and chemical fertilizer are mixed evenly, evenly sprinkled on the field, and then tillage is turned into the soil and mixed with the soil; It is also possible to sprinkle part of the mixed fertilizer on the ground before ploughing the land, plough it into the soil, make a ditch at the ridge position when making a ridge, sprinkle the remaining fertilizer in the ditch and mix it evenly, and make a ridge on the ditch.

When applying bottom fertilizer, it should be noted that the amount of organic fertilizer should not be less than 3500 kilograms, and should be mixed evenly with the soil, otherwise it is easy to appear after sowing the lack of seedlings, broken ridges, uneven seedlings, which is mostly caused by uneven burning of seedlings caused by fertilizer mixing, and the organic fertilizer that is not fully rotted is more prone to the above problems.

2. Light application of seedling fertilizer. The growth of Chinese cabbage seedlings is small, and the fertilizer is not much, as long as the foot fertilizer is applied, there is generally no shortage of fertilizer, and there is no need to supplement fertilizer. Only when no bottom fertilizer is applied or the amount of bottom fertilizer is very small, and a small amount of seedling fertilizer is applied when the seedling growth is weak, and at the same time, partial fertilizer is applied to individual seedlings that do not stop the growth, so that the seedling growth tends to be consistent.

5 kg of ammonium sulfate per mu is applied to promote root development and leaf growth when there is a lot of rain and waterlogging is prone to waterlogging. The amount of fertilizer used in this period must be small, and the fertilizer should be kept away from the seedlings to prevent the fertilizer from burning the seedlings.

The seeds of Chinese cabbage are very small, and if they want to grow into several pounds of Chinese cabbage in just 90 days after sowing, then it has to absorb a lot of nutrients from the soil. Therefore, we must apply a lot of basal fertilizer to the planting area to supplement the lack of nutrients in the soil. Chinese cabbage needs to apply sufficient basal fertilizer, and the fertilizer used as basal fertilizer is generally organic fertilizer, such as manure, compost, mixed manure, skin residue, wool soil, etc., which can gradually decompose nutrients after applying these fertilizers for Chinese cabbage to absorb over a long period of time.

Chinese cabbage topdressing should be based on the principle of "light in front and heavy in the back", and it is the focus of topdressing from the rosette stage to the early stage of the heart. Generally, when 8 10 true leaves of Chinese cabbage, 10 15 kg of 45% compound fertilizer is applied per mu, 4 5 kg of urea per mu is applied at the rosette stage to the early stage of balling, and 5 kg of potassium fertilizer is applied at this time, which can significantly improve the yield and increase the net vegetable rate.

It should be noted that in the northern region, Chinese cabbage is prone to dry heartburn due to calcium deficiency, and calcium nitrate solution can be sprayed at the early stage of balling. For many light acidic soils in the south, Chinese cabbage is prone to boron deficiency, and foliar spraying can be carried out with borax or boric acid solution, which has a good control effect.

All in all, fertilization and top dressing play a very important role in the growth process of Chinese cabbage, and what we have to do, in addition to the application of base fertilizer, is to combine the growth of Chinese cabbage in different periods, timely and scientific top dressing, so as to supply the nutrients needed in the development process of Chinese cabbage, to help them grow better.

(1) Apply sufficient basal fertilizer.

Cabbage has a long growing period and needs a large amount of high-quality organic fertilizer with long fertilizer efficiency, so it is very important to apply a large amount of manure as basal fertilizer. Generally, the manure per mu is not less than 5,000 kilograms. Before ploughing the land, 60% of the manure is sprinkled in the ground and turned deep into the soil, and before harrowing, 40% of the manure is sprinkled on the ground and raked into the shallow soil, and then ridged.

Superphosphate or compound fertilizer should be applied together when applying manure, with a dosage of 50 75 kg per mu.

2. Apply seedling fertilizer.

In order to ensure that sufficient nutrients are obtained at the seedling stage, it is necessary to apply fast-acting fertilizer as "seedling fertilizer". 4 kg of ammonium nitrate or 5 8 kg of ammonium sulfate per mu should be applied to the sowing hole and ditch before live seeding, and then watered and sown.

3) Grow a fertilizer.

The rosette leaf growing in the rosette stage is the organ that produces a large number of photosynthetic products in the bulbous stage in the future, and sufficient fertilization and watering is the key to ensure the strong growth of the rosette leaf, but at the same time, it is also necessary to pay attention to prevent the rosette leaf from growing and causing delayed bulboding. Fertilizer should be applied when a few plants begin to clump in the field, generally 800 1500 kg of manure, 50 100 kg of plant ash, or 10 15 kg of ammonium nitrate, 7 10 kg of phosphorus and potassium fertilizer per mu. Direct seeding cabbage fertilization should be applied in a small ditch of 8 to 10 cm on the edge of the plant and covered with soil.

For transplanted cabbage, fertilizer is applied to the furrow, mixed with the soil and then planted with seedlings. If there is a phenomenon of elongation in the later stage of the rosette, it is necessary to take "squatting seedlings" measures.

4) Bulking fertilizer.

The balling period is the period when the product is formed, and the assimilation effect is the strongest, so the amount of fertilizer required is large. Apply bulbling fertilizer 5 to 6 days before the centering, with a large amount of complete fertilizer with long-lasting effect, especially to increase potassium fertilizer. Generally, 20 kg of ammonium nitrate, 10 15 kg of superphosphate and potassium sulfate fertilizer are applied per mu, or 1600 2500 kg of manure is used, and 50 100 kg of plant ash is used as ball fertilizer.

In order to make the nutrients last, it is best to mix chemical fertilizer with well-rotted manure and make 8 10 cm deep trenches between the rows. This topdressing has the effect of enriching the inside of the leaf bulb and promoting "irrigation", so it is also called "irrigation fertilizer".