What kind of environmental conditions are required for the growth and development of cucumbers

Cucumber likes heat and is afraid of cold, the suitable growth temperature is 18 30, and the most suitable temperature for growth is 24 28. At 0 2, the plant freezes to death, and 5 10 may suffer frost damage. Usually cucumbers below 5 are difficult to adapt, if they are exercised at low temperatures, they can tolerate low temperatures of 3; 10 12 Physiological dysfunction under 12, slow or cessation of childbearing.

The optimal temperature for photosynthesis is 24 32, and the assimilation yield and respiratory consumption are in equilibrium at about 35. When it is higher than 35, its respiration consumption is greater than that of photosynthetic production, and when it is higher than 40, 45, its intracellular protoplasm flow stops. Under the condition of 50, the respiration almost stopped in 1 hour, and the higher the protoplasm condensed, and the daily fever appeared; 60 hours only 5 6 minutes tissue was destroyed and died.

The minimum germination temperature of cucumber seeds was 13, and the optimal germination temperature was 30, and the germination rate above 35 decreased.

The optimal temperature for cucumber root elongation is 32, the maximum temperature is 38, and the physiological activities of the root system are hindered when it is lower than 12, and the lowest ground temperature should not be less than 15.

Low night temperature and large temperature difference are conducive to female flower differentiation. The seedling stage is 30 32 during the day and 10 14 at night, which can reduce the node position of female flowers, increase the number of female flowers, and reduce the formation of male flowers.

What are the most suitable conditions for the sowing date of cucumber seed production?

Cucumber is a temperature-loving crop, requiring a higher temperature, and the appropriate temperature at the seedling stage is 20-30 degrees during the day and 10-15 degrees at night. Temperatures below 10 to 12 degrees can lead to physiological disorders. The suitable temperature for growth is 25-32 degrees during the day, 13-15 degrees at night, and the temperature difference between day and night is 10-17 degrees.

Pre-management: From planting to the beginning of harvesting of melon strips, the management of this period is called pre-management, and the center of pre-management is mainly to promote root control and seedling control. Although the temperature and light have decreased significantly during this period, they have not yet reached their lowest point.

It is best to choose a land that has not been planted in the past two years and should choose a suitable land for cucumber planting, and the pH of the general soil is between to. The soil is rich in organic matter, and the drainage conditions must be particularly good, water and fertilizer retention bias to the cohesive sandy soil, cucumber germination temperature is 30 degrees, just sown seeds, soaking seeds to promote germination and sowing the night temperature of 16 20 degrees is good, the night temperature is too high and the young shoots are long, and the seedlings are not robust after unearthing. The night temperature of the seeds without soaking and soaking the seeds should be kept at 20 to 24 degrees to ensure the temperature and promote early germination.

The germination period of cucumber seeds is not low 12-13, and the suitable temperature is 28-32; Cucumber seedling stage: the temperature during the day should not exceed 24-28 on sunny days, 18-22 on cloudy days, and 12-17 at night; Freshly planted cucumbers prefer warmth and are not tolerant to cold. The fertility temperature is 10 32.

Generally, 25 32 during the day and 15 18 at night grow best; The most suitable ground temperature is 20 25, and the lowest is about 15. The optimal temperature difference between day and night is 10 15.

The survival rate of cucumber seedlings can be reached, it itself is low temperature resistance, high harvest, and cucumber seedlings rarely get sick, and the roots will survive when they hit the soil, so as long as you water and fertilize it at a fixed point, it can survive. The temperature at night is lower than 5 degrees, cucumber seedlings wither directly and are frozen to death, and the temperature at night is higher than 18 degrees, cucumber seedlings will grow quickly, resulting in too long plants in the future, easy to drop flowers, affecting the harvest.

The temperature of seedlings before emergence should be controlled at about 26-28 degrees, and the temperature difference between day and night should be kept at about 10 degrees. Then we also have to pay attention to control the soil temperature, and the soil temperature should also be around 20 degrees. After the seedlings are unearthed, the temperature is 25 degrees Celsius during the day and about 16 degrees Celsius at night until the first true leaves grow.

During this time period, if the temperature is not properly controlled, it will have a very large impact on the growth of cucumber seedlings. It will affect the growth of new leaves, and at worst, it will cause the seedlings to wilt and die.

It is very important for the growth of cucumber planting temperature, cucumber planting temperature condition is 25 32, because cucumber likes warmth and is not tolerant to cold, so the growth temperature of planting cucumber is 10-32. Generally, the daytime temperature is 25-32 suitable, and the growth is best at night 15-18; The most suitable ground temperature for cucumber is 20-25, and the lowest is about 15. The optimal temperature difference between day and night is 10 15.

During the growth period of cucumbers, the temperature should be controlled in the range of 15-30 degrees. If it is lower than two degrees, the cucumber will freeze to death.

Cucumber growth needs to go through the sowing period, germination period, growth period, flowering period, melon setting stage and maturity stage.

1. Sowing period.

Cucumbers can be sown in early spring from 1 to 3 months and in summer and autumn from 6 to 8 months. It is best to choose full, pest-free seeds for sowing, soak them in warm water at about 30 degrees for 4 hours before germination, more than 70% of the seeds turn white after germination, and they must be covered with mulch film after sowing.

2. Germination period.

The germination time of cucumber generally takes about 5 7 days, cucumber grows rapidly after germination, and the flowering and fruiting period is generally in summer, which is a vegetable variety with a higher yield.

3. Growth period.

After the shoots have grown to about 5 cm, it is the growth period of cucumbers, and cucumbers begin to grow leaves during the growth period. At this time, it is necessary to insert something like a wooden stick or a wooden pole at 5 7 cm of the cucumber root for the melon vine to grow and wrap. Around May, the cucumber vines become longer and the leaves become more dark green.

4. Flowering period.

Cucumbers bloom in June, and the vines have many buds, often producing yellow flowers at night. The flowers of cucumbers do not wither and will wither and remain on the melon.

5. Melon setting period.

After the flowers wilt, it is the fruiting stage, and young melons will grow in the places where the flowers grow.

6. Maturity period.

The ripening period of cucumbers is generally about 15 days. Cucumbers are harvested in about 15 days in spring and autumn.

Cucumber Introduction

Cucumber, annual creeping or climbing herb of the Cucurbitaceae family. The stems and branches are elongated, furrowed, and covered with white rough bristles. The tendrils are thin.

petioles slightly rough, with rough bristles; Leaves broadly ovate-heart-shaped, membranous, lobes triangular, toothed. Monoecious. Male flowers:

constant flowers are clustered in leaf axils; peduncles slender, slightly pubescent; The corolla is yellowish-white, and the corolla lobes are oblong-lanceolate.

Female flowers: solitary or sparsely clustered; peduncle stout, pubescent; The ovary is rough. The fruit is oblong or cylindrical, yellow-green when ripe, and has a rough surface. Seeds are small, narrowly ovate, white, without edges, and nearly acute at both ends. Flowering and fruiting period in summer.

Cucumber is not cold tolerant, the most suitable temperature for growth is between 15 and 30, when the temperature is lower than 10, the growth and development of cucumber will be stunted, when the temperature is higher than 35, cucumber will lose water and become wilted because of high temperature transpiration too fast, and there will be flower and melon. Cultivation facilities. Cucumber is a temperature-loving vegetable, and the temperature should not be lower than 8 during the growth period of cucumber, otherwise the cucumber in the shed will be affected by low temperature and suffer from cold damage.

The general greenhouse and yang furrow cultivation mode is not able to ensure the temperature in the harsh winter.

<> variety selection: the main sowing period of cucumber in winter greenhouse is winter and spring stubble, especially in the cold weather in the north, the illumination is very weak, and the temperature is relatively low, so the greenhouse cucumber should be selected as far as possible to withstand low temperature, adapt to weak light, strong disease resistance, early maturity, good quality varieties are grafted, vegetables planted in winter greenhouses, heavy stubble planting more, even if the greenhouse is disinfected no matter how good, it is still impossible to avoid residual germs, which has an impact on the growth of cucumbers. Therefore, it is necessary to choose varieties with strong disease resistance for planting cucumbers.

Reapply high-quality and well-rotted organic fertilizer, apply 3 5 tons per mu, select high-quality varieties suitable for greenhouse wintering, do a good job in greenhouse insulation and lighting, strengthen daily temperature and humidity, pest control and management, use high ridge mulching film cultivation, supporting drip irrigation facilities. We generally will be 10 to 15 days before planting to buckle the shed, and then buckle the shed 7 days after watering on the watering on the third day to ventilate and disperse moisture, 3 to 5 days before planting we will deep over the land, level the ground, and then begin to fertilize, cucumber is a kind of crop that likes fertilizer very much,.

Grafting period management, black seed pumpkin two ** leaves flattened, cucumber seedlings broken when the heart is grafted, after grafting seedbed cover small arch shed insulation and moisturizing, the temperature in the shed to maintain 28-30. , humidity above 95, and shading for three days, in order to facilitate wound healing, 7 days after the cucumber seedlings to break the roots, just planted when the soil is loosened and fertilized to lay the bottom. Watering, pollen after flowering, remove those disabled melons after fruiting, leave those that grow nutritious, and then spray pesticides and insects, and water later to keep the land moist.

The land is very moist and has strong sun exposure, and the soil is very well fertilised, but the air is not too dry.

Because cucumbers are prone to drought, the growing environment needs to be kept moist and kept at about 25 degrees, which is conducive to the growth of cucumbers.

The environment suitable for the growth and development of cucumbers is as follows:

1.Cucumbers like high temperatures, 25 32 is the most suitable, too cold will freeze cucumbers to death.

2.Cucumbers prefer moist environments, but not too much water, and they don't like arid environments.

3.Cucumbers love the sun.

4.The soil in which cucumbers are grown should be rich in humus and have good air permeability.

Cucumber growth habits.

Cucumbers are suitable for growing in loose, breathable, fertile soil, with an optimal pH in between. It grows at a suitable temperature of 20-25 and grows well in 8-11 hours of short daylight. There are certain requirements for soil, and the suitable soil moisture is 60%-90%.

Appearance characteristics of cucumbers.

The stems and leaves of cucumbers are elongated, rough in surface, and prickly particles are attached to the surface. The skin of cucumbers is green, whereas the flesh of cucumbers is white with melon seeds in the middle.

Environmental conditions for growing cucumbers.

Cucumbers are suitable for growing in thick, soft and permeable soil, and the growth temperature should be kept at about 20 degrees. Because cucumbers need to be slippery and bend to have a large amount of water, it is best to keep the growing environment moist, and ensure sufficient light when the mountain is bright.

Cucumber growth process.

The growth process of cucumber is the germination stage, seedling stage, early flowering stage, and fruiting stage. Cucumbers bear fruit after flowering. It has a fast growth rate, a high survival rate, tenacious vitality, and a fast growth rate.

Potted cucumber cultivation points.

Pot size. When cucumber pots are maintained, almost all seedlings are selected for planting, and the survival rate is extremely high. It is necessary to choose flower pots around the head tree.

Conservation of the environment. The potted cucumber soil is mainly loose and fertile. If you have nothing to do, water it more often and put it in a ventilated and warm environment.

Soil bottom fertilizer. Because the growth rate of cucumbers is high, it is necessary to prepare humus and cooked soil, and it is best to add some base fertilizer to the roots to ensure smooth growth in the later stage.

Sun exposure. Cucumbers need plenty of sunlight to grow. Because it is a liana, you can build a shelf to better contact the sun.

Cucumber growing environment:

1. Temperature, cucumber likes warmth, does not tolerate cold, and the suitable temperature for growth is 10 to 32 degrees Celsius;

2. Light, the North China variety has not strict requirements for the length of sunshine, and has become a sunshine neutral plant, with a light saturation point of 55,000 lux and a light compensation point of 1500 lux, and the multi-pulse variety grows well under the short sunshine conditions of 8 to 11 hours;

3. Moisture, cucumber yield is high, water demand is large, suitable soil moisture and air relative humidity is 60% to 90%, air relative humidity is too large and easy to get sick, resulting in reduced yield;

4. Soil, cucumber likes moisture but not waterlogging, fertilizer but not fertilizer, and it is advisable to choose fertile soil rich in organic matter.

The growth process of cucumbers:

1. The germination period takes about 5 to 8 days from sowing to the appearance of the first true leaf;

2. At the seedling stage, it takes about 30 days from the appearance of the true leaves to the planting of about 4 to 5 true leaves;

3. At the beginning of flowering, at the stage of vine extraction, it takes about 25 days from the planting of 4 to 5 true leaves to the first female flower melon to sit;

4. During the melon-setting period, from the first fruit to the seedling pulling, the time varies according to the cultivation method, cultivation conditions and varieties, and generally goes through 30 to 100 days.

Huangqian melon is an annual creeping or climbing pure plant, which is grown by seed germination.

How to care for cucumbers.

1. Cucumber temperature requirements.

The loofah likes warmth and does not resist the cold. The optimal temperature for pregnancy is 10 32. Usually 25 32 noon and 15 18 in the evening are the most suitable for growth; The most suitable soil temperature is 20 25 and the minimum is around 15.

The most suitable temperature difference between day and night is 10-15. The loofah high temperature 35 respiration is not good, 45 high temperature obstruction, the bottom temperature -2 0 freezes to death, if the bottom temperature refining seedlings can bear the bottom temperature of 3.

2. Cucumber's requirements for light.

The East China species were more sensitive to short days, while the medium-sized species were less stringent about the length of sunlight and had become a sunshine alkaline salt plant. Most of the species grow well under the standard of 8 11 hours of short-day sunlight.

3. Cucumber's requirements for moisture.

The production and sales of loofah are high, and the water demand is large. The suitable soil moisture content is 60 90%, the water content of the seedling stage is not suitable for too much, the soil moisture content is 60 70%, and the supply and demand must be balanced and abundant water in the fruiting period, and the soil moisture content is 80 90%. The relative humidity of the air suitable for the loofah is 60 90%, and the air phase is not matched to the humidity is too large, which is easy to get sick, resulting in limited production.

4. Cucumber's requirements for soil quality.

The loofah likes moisture but not waterlogging, fertilizer but not fertilizer, and it is advisable to choose dense soil with soil fertility. I usually prefer soil in the middle of the pH, but the pH value is the most suitable.