There are those drugs that can inhibit the growth of sunflowers and change their growth habits

Sunflower growing conditions.

Sunflowers prefer a warm, moist and sunny growing environment, and can be planted on dry land, barren land, and saline-alkali land. Their ability to resist salt and alkali is relatively strong, and the main producing areas are Hubei, Jiangsu, Zhejiang, Heilongjiang and other places. However, the temperature requirements for sunflower-type chains are not strict.

The suitable germination temperature is 31-37, and the maximum should not exceed 44. The plant is not hardy and has a minimum growth temperature of 5-10.

Xiang Rikai judged the growth period and process of sunflowers.

Sunflowers grow mainly in grasslands, or in dry and open areas. They also grow on roadsides and at the edge of fields, with a growing period of about 85-120 days. Sunflowers grow quickly.

If properly maintained, it will bloom in about 3-4 months, and its growth will go through multiple stages such as germination, budding, flowering, and maturity.

Sunflower planting process and method.

1.Seed treatment: When planting, raw melon seeds with full grains and no diseases and pests should be selected as seeds, and a disinfection treatment should be carried out before planting.

2.Choose the soil: When growing sunflowers, you need to use well-drained soil with plenty of organic matter.

After planting, the soil should also be loosened regularly to increase the air permeability of the soil. 3.Sowing:

Put the sunflower seeds in the soil, then cover with a thin layer of soil, water it once, and soak it all through.

Sunflower likes a warm, humid and sunny growth environment, and can be planted in dry land, barren and saline-alkali land, and has strong resistance to salt and alkali, and is mainly produced in Hubei, Jiangsu, Zhejiang, Heilongjiang and other places.

Sunflower is not strict for the temperature requirements, the more suitable germination temperature is 31-37, the highest can not exceed 44, the plant is not cold-tolerant, the minimum growth temperature is 5-10.

Sunflower growth period and process.

Sunflowers mainly grow in grasslands, or dry, open areas, but also along roadsides and the edges of fields, with a growth cycle of about 85-120 days.

Sunflowers grow fast, and if properly maintained, they can bloom in about 3-4 months, and their growth will go through multiple stages such as budding stage, budding stage, flowering stage, and maturity stage.

Sunflower planting process and method.

1. Treat the seeds when they are good: when planting, we should choose raw melon seeds with full particles and no pests and diseases as seeds, and carry out a sock starvation treatment before planting.

2. Choose soil: When planting sunflowers, you need to use soil with good drainage and rich organic matter content, and regularly loosen the soil after planting to increase the air permeability of the soil.

3. Sowing: Put the sunflower seeds on top of the soil, then cover with a thin layer of soil, water it once, and soak all the soil.

Sunflowers grow very fast and generally bloom after planting for a month. Sunflowers are usually propagated as seeds, and they contain auxins in their bodies, which, under the influence of gravity, can track the sun and change its direction. Potted sunflowers need to be repotted and changed once every two years, if the soil is not changed in time, the branches and leaves will gradually lose their color, in the process of potted cultivation, to keep the soil slightly wet, do not make the soil dry for a long time.

Sunflowers grow very fast and generally do not bloom until two months after they are planted. Sunflowers are usually propagated by the form of seeds. Sunflowers contain auxins in their bodies, which, under the influence of gravity, can track the sun and change its direction.

Appearance characteristics of sunflowers.

Sunflower is an annual herbaceous plant with a very erect appearance, alternate leaves with two leaves, heart-shaped ovate or oval, large capitate inflorescences, and summer flowering.

After the fruit of the sunflower blooms, it usually takes on a gray or black color, i.e., melon seeds.

Environmental conditions for the growth of sunflowers.

1. Temperature: As long as the sunflower is not less than 10, it can grow normally, and in the appropriate temperature range, the higher the temperature, the faster the growth period.

2. Water: Sunflower leaves are many and dense, and it is a highly water-consuming crop. Both the flowering and ripening stages require more water.

3. Light: Sunflower is a short-day crop that likes full sunlight but is less sensitive to sunlight.

Sunflower growth process.

1. Seed germination period: After the seed germination, the sunflower will grow young shoots, gradually grow taller, and grow from 1 2 leaves to form a leafy plant.

2. Budding period: During this time, sunflowers grow vigorously, not only have a star-like experience on the top, but also gradually develop into a flower plate.

3. Present flowering period: from more than three-quarters of the plant to flower, until it is fully bloomed.

4. Maturity period: After the flowering period of sunflower is over, the seeds will bloom after they are fully mature.

Potted sunflower cultivation points.

1. Repotting: Potted sunflowers need to be repotted and changed once every two years, if the soil is not changed in time, the branches and leaves will gradually lose their color.

2. Light: Sunflower is a sunshine plant, which has a great demand for sunlight and should be placed in a sunny place.

3. Slightly moist soil: The roots of sunflower are relatively developed, in the process of pot cultivation, it is necessary to keep the soil slightly moist and do not make the soil dry for a long time.

There are three aspects of the role of sunflowers, which are:1. Sunflowers are meant to be peaceful, sunflowers are also called sunflowers, like to grow luxuriant in a long-term sunshine environment, and sunflowers symbolize different meanings, mainly silent love, loyalty, health, vitality, bravery, bright beauty, the meaning of the love of life, has always been loved and praised by many people.

2. Sunflower can not only be eaten but also used as medicine, seeds, flowers, stems and leaves, flower discs, stem piths, roots, etc., which can be diuretic and anti-inflammatory, stomach and blood pressure.

3. Sunflowers can absorb harmful substances in the soil, purify the soil and air, and the roots are rooted in the soil, extract the harmful substances in the soil, store them in the roots, and pass through photosynthesis.

and its own metabolism, which is discharged.

The uses of sunflowers include ornamental value, edible value, medicinal value, and environmental value.

1. Ornamental value.

Sunflowers are so ornamental that they are often used as ornamental plants. The flower plate of the sunflower resembles a sun, and the color and shape of the flowers are more attractive. If it is planted in a large area, it will bloom golden yellow when it blooms, which greatly enhances its ornamental use.

2. Edible value.

Sunflowers can also be eaten. The sunflower seeds that everyone loves to eat come from this plant. Sunflower seeds contain abundant nutrients, such as vitamins, folic acid, iron, etc.

These substances are beneficial to the human body. When people think of sunflowers, they think of sunflower seeds, because it has become a popular snack for leisure.

3. Medicinal value.

The medicinal value of sunflowers is also good. The whole body of this plant can be used as a medicinal herb. Its roots, if decocted with water, can ** urinary urgency, painful urination and other diseases.

Sunflower flower disc can also effectively ** dizziness, and at the same time has the effect of clearing heat and reducing phlegm. In addition, the petals and leaves of sunflowers have the effect of clearing heat and detoxifying, so they can be used as stomach and digestive medicine.

4. Environmental value.

Sunflowers are also said to purify the air. Nowadays, many cities are relatively polluted, so sunflowers can be planted on the side of the road to effectively absorb bad substances in the air and give people a healthy environment. In this way, growing sunflowers is a healthy behavior.

What was the first commercial use of sunflowers

In the United States, the first commercial use of the sunflower crop was for silage for poultry. In 1926, the Missouri Sunflower Growers Association was involved in the first process of processing sunflower seeds into oil. Canada began its first official** sunflower breeding program in 1930.

Sunflowers have a short growing period and are not afraid of high temperatures. It can be planted in all seasons, mainly in summer and winter.

The flowering period can be more than two weeks. Varieties can be divided into "common ornamental" varieties or "edible" varieties, and individual ornamental varieties are characterized by relatively short plants, usually no more than half a meter.

ornamental sunflowers, so they are suitable for planting in potted plants; Edible varieties are taller and grow to more than 2 meters in the soil of normal open-air nurseries. The growth of sunflowers is proportionate and agile, and the flowering period can be more than two weeks, and the growth of sunflowers is closely related to factors such as temperature, moisture, light, and soil.

Growth and fertility periods.

The growth period of sunflower refers to the number of days from seedling emergence to seed maturity, which is generally more than 85 120 days. The length of the growth period varies depending on the variety, sowing date and cultivation conditions. The whole growth period of sunflower is divided into four growth periods: seedling stage, budding stage, flowering stage and maturity stage.

1.Seedling stage.

From the emergence of seedlings to the emergence of buds, it is called the seedling stage. It generally takes 35-50 days, and 28-35 days for summer sowing. This period is the stage of leaf and flower primordium formation and floret differentiation.

At this stage, the growth of the aboveground part is stunted, and the root system of the underground part grows rapidly, and a strong root system is formed soon, which is the stage with the strongest drought resistance of sunflower.

2.Budding period.

A stellate body with a diameter of 1 cm appears on the top of the sunflower, commonly known as the bud. It generally takes about 20 days from budding to flowering, which is the period of vegetative growth and reproductive growth, and it is also the most vigorous stage in life. During this period, sunflowers need the most fertilizer and water, accounting for about 40 50% of the total fertilizer and water requirements.

If the demand for water and fertilizer cannot be met in time during this period, the yield will be seriously affected.

3.Anthesis.

In the field, 75% of the plants have tongue-shaped flowers open, that is, they enter the flowering stage. It usually takes 6 to 9 days for a flower disc to open from the tongue to the tubular flower. From the second day to the fifth day is the peak flowering period of this inflorescence.

The number of flowers blooming on these 4 days accounts for about 75% of the number of flowers. The flowers mostly bloom at 4-6 o'clock in the morning, and are pollinated and fertilized the next morning. Unfertilized shoots can remain for 7-10 days without withering.

The self-pollination and seed setting rate of sunflower is very low, only about 3%, while the seed setting rate of hetero-pollination is high.

High temperature, rain, humidity, lack of light, and dry soil will reduce the seed setting rate. Therefore, adjusting the sowing date, timely fertilization, watering, pest and disease control, and taking measures such as bee release or artificial assisted pollination can improve the seed setting rate.

4.Maturity.

From flowering to maturity, spring sowing 25 to 55 days, summer sowing 25 to 40 days. There are differences between different breeds. About 15 days after flowering and pollinating shield is the stage of seed formation. The weather should be clear, the temperature difference between day and night is large, and the soil moisture is suitable. Fold.

Sunflowers grow quite quickly, usually planting about two months before flowering, its flower types are single-petaled, double-petaled or single-flowered, multi-flowered, flowering period is quite long up to more than two weeks. In addition to the appearance of sunflowers, the flowers are bright and generous, the flower plate moves with the sun, suitable for ornamental decoration, and the seeds have more economic value, which can not only be made into popular sunflower seeds, but also can be squeezed out of high-grade edible sunflower oil with low cholesterol. The varieties of sunflowers can be divided into "general ornamental" varieties or "edible" varieties, and the general ornamental varieties are characterized by short plants, usually no more than half a meter, so they are suitable for planting in potted plants; Edible varieties are taller and grow to more than 2 meters in the soil of general open-air nurseries.

The main thing is, of course, like the fertile and light too! I also want your love and care!!

Sunflower is a sun-loving plant, planting and maintenance should be reasonable, "I love sunflower" is a special sunflower**, there are detailed answers to the situation of sunflowers, you can go to their home ** to learn more.