If you want to grow broccoli in a greenhouse in winter, what should you do with its seedling technol

Broccoli is a nutritious, mild-flavored, and popular vegetable. Eating broccoli regularly can improve immunity and regulate the preventive effect on people with heart disease and high blood pressure. It also has an anti-cancer effect, and the market value is also very high, which is respected by consumers and loved by growers.

The main growing seasons for broccoli are spring and autumn. It is fat, needs a lot of fertilizer, and the plant is tall and cannot withstand drought or soaking. It is suitable for planting in places with loose soil, deep tillage layer, and large water and fertilizer.

Broccoli is a vegetable variety in cabbage that mainly eats flower bulbs, so after broccoli passes the vernalization stage, it must enter reproductive growth from vegetative growth to form a product and bring yield.

Broccoli has successfully passed the spring bloom stage in the range of 5 to 25 degrees Celsius, and the fastest can reach about 15 degrees Celsius, so it is most suitable for planting in spring and autumn. The use of greenhouses to plant overwintering broccoli has a strong momentum of plant growth, and the market sales volume and sales volume before and after the start-up and Spring Festival are large, which can bring good economic benefits to growers. It is best for growers to choose varieties with large flower bulbs, firm flowers, vigorous growth, more wax, low temperature tolerance, and strong disease resistance.

Seedlings can be cultivated in a shed room or in a nursery tray, and the germination temperature of broccoli seeds is about 20 degrees Celsius, and the moisture and temperature (20 to 30 degrees Celsius) can be guaranteed after sowing, so that the seedlings can germinate and germinate smoothly.

The young age of broccoli is generally about 30 to 35 days, and the seedlings can be officially eaten when they grow 5 or 6 true leaves. 3-5 days before planting, adjust the water, adjust the fertilizer, and improve the survival rate of transplanting by ventilating the seedlings. The battle that awaited the official ceremony had to be turned over a week or so in advance.

There are about 3,000 kg of organic fertilizer and about 30 kg of compound fertilizer in the field, and the planting ridges are deeply raked. The width of the ditch is about 70 cm, the width of the ditch between the ditch and the ditch is about 50 cm, each ditch is planted in two rows, and each tree is about 35-40 cm. In order to ensure temperature, reduce evaporation, and to collect humidity in the warehouse, it is better to cover the ridge with mulch.

In winter, stump broccoli should promote growth, combined with the growth situation, and early topdressing should be carried out after the seedlings are slowed. It may be cold after half a month of formal eating. The compound fertilizer is about 30 kg per mu, and the temperature is maintained at 8 24 degrees Celsius to promote plant growth.

At present, Lei ** has about 10 kilograms of compound fertilizer. When the flower bulbs appear, the temperature in the warehouse room is maintained at 15-18 degrees Celsius. This is because this is the most suitable temperature for the formation of flower bulbs.

This period is more important, the temperature should not be too high or too low, the quality of the fire area above 24 degrees Celsius decreases, and the fire area below 8 degrees Celsius grows slowly. Broccoli should be adequately watered and fertilised** during farrowing, usually about once a week to keep the soil moist and hydrated. Broccoli is more common in some kind of quenching cold, which is not regional, and is more common in many places.

After the seeds germinate and emerge from the soil, the lower part of the stem shows signs of a waterbed, softly shrinks and becomes thinner, and it runs around the stem in a short time and falls, and may eventually rot.

Seedbed selection: Substrate hole tray or field that has not been planted with cruciferous vegetables in the past 2 years is used as seedbed. Build a greenhouse:

Suitable density: 1 grain per hole of the matrix acupuncture plate; Ordinary field seedlings 125 135 square meters, the sowing amount of gram square meters, do not exceed gram square meters, to prevent the occurrence of tall seedlings in the later stage. Generally, 20 22 square meters of seedbed can be planted in acres of field.

Fine sowing: the seedbed should be finely leveled, watered enough to permeate the water, evenly sown, and covered with fine soil about centimeters after sowing. Multi-layer overlay:

After sowing in winter, cover the mulch film in time, and build a small arch shed, multi-layer covering, improve the bed temperature, and achieve high temperature and high humidity to promote the seedlings.

Planting broccoli in greenhouses requires the use of sandy loam soil with rich trace element content and loose soil, and the broccoli seeds need to be germinated before planting, and then sow them in the soil after the seeds germinate smoothly, and at the same time, it is necessary to provide reasonable water and fertilizer for broccoli in the later stage of maintenance, so that the plants can grow healthily.

1. Select the soil

Growing broccoli in greenhouses requires choosing the right soil. Broccoli is suitable for growing in soil with rich organic matter content and good drainage, so it is best to use sandy loam or humus soil with rich organic matter content and loose soil when planting broccoli, and the soil needs to be renovated before planting.

2. Treat the seeds

Growing broccoli also requires proper treatment of the seeds. First of all, you need to pick the broccoli seeds that are full of grains and have not suffered from pests and diseases, then you can lay the broccoli seeds on the absorbent cotton cloth, cover it with another layer of cotton cloth, spray water on the cotton cloth regularly, wait a week, and the broccoli seeds will germinate.

3. Planting

After the broccoli seeds germinate, the broccoli can be sown in the soil and buried with an appropriate amount of fine soil, and at the same time, it is also necessary to provide the broccoli with the right amount of water after planting, soak all the soil, create a more humid growth environment for the plant, and let the broccoli grow better.

4. Later maintenance

In the later maintenance of broccoli, it is necessary to provide nutrients for the plant reasonably, improve the growth rate of broccoli, and also provide suitable light for broccoli, so that the plant can carry out photosynthesis normally, and also need to ventilate the broccoli regularly to improve the ventilation of the plant growth environment, so that the broccoli grows more vigorously.

During the period when broccoli does not germinate after sowing, it is necessary to observe the germination regularly and check it twice a day. It mainly examines germination, soil moisture, and light intensity. In the high temperature environment in summer, attention should be paid to temperature control and reasonable watering to control the soil temperature.

Keep the soil temperature at around 26 degrees. In order to promote the normal germination and breaking of the soil of the seeds, pay attention to the time when watering, not in the middle of the day. And pay attention to weather changes to prevent rain after watering.

Finally, do a good job of shading to prevent direct sunlight from affecting the emergence of seeds. Temperature is very important for the growth of broccoli seedlings. The temperature before emergence is controlled at about 22 degrees, and the temperature difference between day and night is about 10 degrees.

Then after the emergence of seedlings, the temperature should be appropriately reduced by 5 degrees. Improper temperature will not only reduce the germination rate of seeds, but also affect the growth of seedlings.

The growth ability of seedlings decreased, and the growth of seedlings was weak. The temperature should be appropriately adjusted according to the growth of broccoli and seedlings, so as not to be uncomfortable at temperature, affect the normal growth of broccoli, and reduce the planting efficiency. In broccoli, a week before planting, we should do a good job of refining seedlings.

Improve the adaptability of seedlings, properly watering after sowing, and increase soil moisture content. Then wait for all the seedlings to be planted, uncover the straw, and properly control the soil at about 75%. When refining seedlings, it is necessary to pay attention to ensure proper light, so it is necessary to remove the shade net in time to provide enough light for the growth of seedlings, but also pay attention to the intensity of sunlight to avoid direct sunlight causing seedling burns.

Moreover, it is necessary to do a good job in pest control and reduce the survival rate of seedlings.

Remove diseased leaves and old leaves in time to facilitate ventilation and light transmission, promote the accumulation of nutrients to the flower bulbs, pay attention to control moisture, and prevent diseases and mildew caused by excessive humidity. In case of acid rain or fog, water should be sprinkled in time to wash off the mist and acid rain to reduce the rot of the flower bulbs. The suitable harvest time for broccoli is very short.

If the harvest is too late, the flower bulbs are loose, the flower buds are yellow, and the quality is reduced, but the harvest is too early, the flower bulbs are small, and the yield is low. When the temperature rises, we should pay attention to ventilation. After the end of March, when the plant is large, the small arch shed should be removed in time to avoid the impact of high temperature on the development of flower buds.

Thin fertilizer is applied after planting, which is conducive to plant recovery and early growth, and heavy fertilizer is applied at the budding stage to promote the development of bud balls and increase yield.

Temperature control.

Temperature is very important for the growth of broccoli seedlings. Before emergence, the temperature is controlled at about 22 degrees, and the temperature difference between day and night is about 10 degrees. Then after the emergence of seedlings, the temperature should be appropriately lowered by 5 degrees.

If the temperature is not right, it will not only reduce the germination rate of seeds, but also affect the growth of seedlings. As a result, the growth ability of seedlings decreases, and the growth of seedlings is weak. Therefore, we should appropriately adjust the temperature according to the growth of broccoli seedlings to prevent temperature discomfort, affect the normal growth of broccoli, and reduce planting benefits.

If the sowing is too dense, the seedlings should be uprooted in time, and the weak seedlings that are too crowded or growing poorly should be removed, and the light should be appropriately strengthened, ventilation and cooling should be carried out to prevent the seedlings from growing and cataplexy.

Broccoli is mainly managed by temperature and humidity at the seedling stage. Broccoli needs to be properly exposed to sunlight at the seedling stage, but not excessive direct sunlight, otherwise the seedlings are prone to wilting. This requires a canopy at the top of the greenhouse to prevent direct sunlight from lowering the temperature in the greenhouse.

In addition to this, water twice a day to maintain the moisture of the soil. In order to prevent pests from eating seedlings and affecting their growth, you can splash some milel on the soil to strengthen the management of fertility to promote the development and growth of seedlings, and regular spraying of pesticides on weekdays will also reduce the incidence of various pests and diseases.

Broccoli is a vegetable with high nutritional value. Many people say that eating more broccoli can prevent cancer, which shows that broccoli has attracted more and more attention. In recent years, many novices have come up with the idea of growing broccoli, so what should we pay attention to when growing broccoli?

Slow seedling stage. The seedling stage is generally after sowing. When the broccoli-type wild flowers are in the slow seedling stage, pay attention to the temperature and humidity.

If the temperature is too high, it is necessary to provide proper shade, cool down, and maintain humidity with proper watering every day. However, it should be noted that the incidence of pests and diseases is higher during this period, and preventive measures should be taken in advance.

Wreath period. The rosette stage is the period when broccoli is vigorous. At this time, growers need to control the timely application of fertilizer.

If fertilization is not mastered in time, it will directly affect the yield in the later stage. In general, the amount of fertilizer should not be less than two times. In addition, in the process of top dressing, attention should also be paid to the control of the amount of fertilizer.

Partial or large use can cause adverse effects.

Heading period. The most important growth stage of broccoli must include the heading stage. If the nutrition does not keep up, it will affect the formation of the flower bulbs and the quality will not keep up.

At this time, it is necessary to control the amount of nitrogen fertilizer, not too much, resulting in too fast growth. The proportion of phosphate fertilizer, boron fertilizer and other elements can be appropriately increased. Foliar fertilizer can be added appropriately in the formation period, generally once a week, three times in a row, and the old ridged leaves should be removed in time.

Harvest time. Moisture management is very important during harvest, but too much can also lead to rot. The harvest period should be well controlled, too early or too late can have a big impact. In the period leading up to harvesting, you can observe the broccoli leaves more and remove the rotten leaves.

To sum up, this is the focus of broccoli cultivation. We can understand that the management points are different at each stage of growth. Only by mastering the characteristics of the different growth stages of broccoli can we grow broccoli better.

Broccoli does not have very strict requirements for light, but it likes sufficient light in the growth process, and the plant grows robustly when the light is sufficient, which can form a strong nutrient body, which is conducive to photosynthesis and nutrient accumulation, and makes the flower bulb compact and dense, the color is bright green and of good quality, and the sun is too strong in midsummer is not conducive to the growth and development of broccoli.

Temperature in the range of 5 20, the higher the temperature, the faster the growth and development of broccoli. The optimal germination temperature is 20 25, and the growth temperature at the seedling stage is 15 20.

Soil nutrients: broccoli does not have strict requirements for soil conditions, but if it is too poor, the plant will be stunted and the yield and quality will be low. Excessive soil fertility can lead to loose flower buds and hollow moss.

Broccoli is suitable for planting on loam and sandy loam soils with good drainage and irrigation, deep tillage layer, loose and fertile soil, and strong water retention. Adapts to the soil pH range, but 6 is best.

Broccoli needs sufficient fertilizer throughout the growth process, and its ratio of n, p, and k is 14:5:8. The need for nitrogen at the seedling stage was relatively high, and the demand for P and K increased after the flower buds began to differentiate.

Be sure to pay attention to ventilation and lighting. This is very important so that broccoli can grow healthier and avoid many diseases.

First of all, we must choose good broccoli seedlings, and secondly, we must have a suitable seedling space, and the way of planting should also be paid attention to.

The growth and development of broccoli seedlings includes three stages: germination stage, basic vegetative growth period and rapid seedling growth stage. Broccoli likes cold and is a semi-cold-tolerant vegetable. The temperature of germination is 3, the temperature is 20-25, the temperature is 35, the temperature is 20-22, and the flower bulbs will be damaged by frost at a low temperature of -5-3.

Flower bud differentiation is not strict on low temperature requirements, early maturing varieties can be differentiated by flower buds as long as the average temperature is below 20, but in the seedling stage, small flower bulbs will be formed and lose commerciality and reduce yield, and the temperature is lower than 8 and the growth is slow.

The flower bud differentiation of mid-late maturing varieties requires low temperature, so they cannot be cultivated in the high temperature season, otherwise leaf inserts, hairy flower balls and scorched buds will be formed. Therefore, broccoli has stricter requirements for sowing date. Broccoli requires plenty of light, but the length of sunlight is not strict.

It likes moisture, but it is not drought tolerant, not waterlogging tolerant, and has strict water requirements, especially in the seedling stage, drought prevention and waterlogging prevention are the focus of seedling management. The seedbed soil is required to be loose, fertile, and have good water retention and seepage performance.