What are the processes that sunflower trees need to go through to grow?

Sunflower growth process diagram from the seed, flower blooming, flower withering process The rhythm of life.

Sunflower seeds will sprout small shoots shortly after planting, and they will go through a budding period of more than a month, during which the root system will germinate more and one or two true leaves will grow. After that, the flower disc will gradually grow at the tip of the plant, and the leaves will continue to grow. The flowers will be fully bloomed in about 20 days, and the flowering period will be about a week.

After the flowers bloom, the seeds will gradually mature, which will take about 30 days.

Sunflower seed germination method.

1. Absorb water and germinate: Sunflower seeds can be germinated using the method of water absorption and germination, first use cotton, toilet paper and other water-absorbing items to wrap the sunflower seeds, and put them in a cool environment, spray some water every day, and the sunflower seeds will germinate in about a week.

2. Plant in the soil: The easiest way for sunflower seeds to germinate is to plant them in the soil, first choose a piece of land suitable for sunflower growth, preferably sandy soil rich in trace elements, so that sunflowers can germinate quickly.

Sunflower seed harvest.

It takes about 7-8 months from planting to harvesting sunflowers, and it generally takes 35 to 50 days from seedling emergence to flower buds, which is an important stage for flower bulb formation and floret differentiation, and then from flower buds to flowering, it generally takes about 20 days. At this time, the sunflower has entered its reproductive growth period, which is also the most important stage in the growth process of the sunflower, and it is necessary to fertilize and water the ornamental sunflower more during this period, so that the sunflower can be harvested normally.

Sunflowers will grow small shoots soon after planting, and they will go through a budding period of more than 1 month.

The growth process of sunflowers is described as follows:1. Seed stage: Sunflower seeds mature in August and September.

2. Seedling stage: sunflower seedlings emerge to the seedling stage, at this stage the leaves are formed and the flower buds are differentiated.

3. Present storage period: When a star with a diameter of 1 cm grows on the top of the sunflower, it enters the budding stage.

4. Flowering period: The flowering period refers to the opening of 75% of the tongue-like flowers of sunflowers.

5. Maturity period: sunflower flowering to maturity into the maturity period.

6. Withered ling: sunflowers will wither in the later stage.

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.

First, the budding stageAfter sowing, sunflowers will grow young shoots. From this time to the beginning of the bud, it is the budding stage, which takes about 35-50 days. During this time it grows taller and grows from 1-2 leaves to multiple leaves.

Its root system also grows rapidly at this time and becomes very developed.

2. The budding stageWhen the top of the plant grows a star-like body, until its flowers begin to open, it is its budding stage. It takes about 20 days. At this time, it grows very vigorously, and not only does the star at the top continue to grow, gradually developing into a flower disk, but its branches and leaves also continue to grow.

3. The current flowering period is from more than three-quarters of the plant's flowers to the end of its flowers. It takes about 6-9 days. Its flowers continue to bloom during this time.

If pollination is done, the flowers will wither early, but if pollination is not done, the flowers will be able to bloom for about 7-10 days.

Fourth, the maturity period is its maturity period from the time it blooms until the grain is fully mature. This time is between 25-55 days, which varies greatly depending on the breed. If pollination is successful, the kernels will be able to start producing after 15 days.

Under the right conditions, the kernels will be fully ripe after about 1 month.

The details of the sunflower growth process are as follows:

1. Budding stage: During this period, sunflowers will continue to grow taller and have more and more leaves. And the root system will also become more and more developed.

The star at the top of the body will form a flower disk, and the other leaves will continue to grow. At this time, the seeds will germinate and then mature. From the top of the plant to the time of flowering, it is the time of flowering.

It will take more than 20 days. At this time, it grows rapidly, and not only the astrocytes at the tip are still growing, but also growing.

2. In the budding stage, there is a centimeter-sized star-like body at the top of the sunflower, which is called "bud". It usually takes about 20 days, which is the simultaneous occurrence of vegetative growth and reproductive growth, and is also the most vigorous stage of life. During this period, sunflowers need the most fertilizer and water, accounting for 40-50% of the total fertilizer requirement, if water and fertilizer are not provided in time, it will have a great impact on the yield of crops.

3. At the time of flowering, at the time of flowering, 75% of the plant's tongue-shaped flowers enter the flowering period after flowering, and a flower disc opens from the tongue-shaped flower to the tubular flower. It generally takes 6-9 days, and from the second to the fifth day is the full flowering period of the inflorescence. During these 4 days, about 75% of the flowering is open.

The flowering time is generally between 4 and 6 a.m., and it will bloom the next morning.

Sunflower Introduction:

Sunflower is a plant of the order Platycodon, Asteraceae, and sunflower. It is named because the inflorescence rotates with the sun. Annual herb, tall rice, up to 9 meters tall.

The stems are erect, rounded and angular, stiff and covered with coarse white bristles. The broadly ovate leaves are usually alternate, apex acutely or acute, with 3 veins at the base, coarsely serrated margins, rough on both sides, hairy, and long-stalked.

Capitate inflorescences, 10-30 cm in diameter, solitary at the top of the stem or at the end of the branch. The bracts are multi-layered, leafy, tile-like, covered with stiff hairs, flowering in summer, with neutral yellow tongue-like flowers at the margins of the inflorescences, not bearing fruit. The middle of the inflorescence is bisexually tubular flowers, brown or purple, and can bear fruit.

Rectangular ovate achenes, the pericarp lignified, gray or black, called sunflower seeds.

In this way, because the auxin backlight distribution of the receptacle of the sunflower, the stem on the backlit side grows faster, and the stem bends towards the light source.

Sunflowers are named because the top of the young plant in the early stage of growth and the young flower disc in the middle stage rotate very clearly with the sun. It is believed that sunflowers are only related to light exposure, but in fact, they are also closely related to gravity.