What time does the sunflower bloom? What does it mean?

Sunflower disk is shaped like the sun, beautiful, simple and natural, full of vitality, generally planted in pieces, golden when blooming, extremely spectacular, but also has a high economic value, deeply loved by everyone. So, what time does the sunflower bloom? What does it mean?

What time does the sunflower bloom?

Sunflowers are usually sown in April, bloom in July-September, bloom between 4: 00 and 6: 00 in the morning, and fruit in August-September.

What is the moral of sunflowers?

Its moral is silent love, flower language is faith, glory, arrogance, loyalty, love, represents the courage to pursue the happiness they want. Although the flower posture of the sunflower is not as romantic as the rose or as pure as the lily, it is sunny, bright, magnanimous and unforgettable, has its own unique charm, and blooms not only love, but also the love of dreams and life.

Third, what are the key points of sunflower cultivation techniques?

1. Select the place

The root and stem of sunflower have well-developed ventilatory tissue and are resistant to waterlogging. Cultivation should choose the land with flat land, medium fertility, convenient irrigation and drainage, and relatively low soil viscosity, and should not be replanted. Reproduce in the way of seeds, and peat soil is suitable for sowing. Seed dressing with new high-fat membrane before sowing can ward off underground pests, isolate virus infection and improve seed germination rate.

2. Sowing seeds

The time is generally from March to April, and the suitable temperature for sowing is 18-25 ℃. It usually sprouts about 5-7 days after sowing. The basic principle of sowing date selection is to sow early or late appropriately according to the occurrence law of saline-alkali, so that the seedlings can avoid the harm of saline-alkali. Spring sowing or summer sowing according to the growth period of the variety.

3. Land inspection

Sunflower is a dicotyledonous crop, it is difficult to grow seedlings on the top soil, coupled with soil preparation, sowing quality is not high, or rain topsoil hardening after sowing, or diseases, insects, rats, finches and other damage, are easy to cause lack of seedlings and broken ridges. In order to ensure the whole seedling sowing, the field-by-line inspection must be carried out at the seedling emergence stage, and the missing seedlings should be replanted in time.

4. Fixed seedling

Sunflower cultivation should be early to prevent seedling squeeze, affect the cultivation of strong seedlings, and even the future yield, as for saline-alkali land and pest-heavy plots, the seedling fixing time can be postponed appropriately. At the same time, sunflower seedlings should be determined as early as possible, which is conducive to the cultivation of strong seedlings and disk development, which should be carried out at 2 pairs of true leaves.

5. Ploughing

Generally, intertillage was carried out for 2-3 times, the first intertillage was carried out in 1-2 pairs of true leaves, the second intertillage was carried out one week after seedling setting, and the third intertillage was completed with ditching, soil cultivation and fertilization before ridge closure.

6. Topdressing

Sunflowers prefer fertilizer, trench topdressing is usually carried out in the third intertillage, mainly nitrogen and phosphorus fertilizer, 5 kg of diammonium phosphate per mu, 10 kg of urea, mixed evenly and applied to the soil. Trenching and soil cultivation can effectively ensure the growth and development of secondary roots, prevent lodging and reduce the basal branches below cotyledon nodes.

7. Irrigation

There is not much water from sowing to budding, the peak of water demand from budding to flowering, and more water from flowering to maturity. Sunflower irrigation uses furrow irrigation, the general plant height of 1.5 meters of varieties, head water should be carried out in the flower bud stage, Ershui in the early flowering stage, Sanshui in the filling stage. For the varieties with a plant height of about 2 meters, the head water was carried out 4-5 days before flowering (severe drought and irrigation in advance), the second water was 6-7 days after the head water, and the three water was in the filling stage.

8. Pollination

The seed-setting rate of self-pollination of sunflower is low, and the seed-setting rate of cross-pollination is high. During cultivation, artificial pollination should be carried out in time, pollination should be carried out by means of disk, powder flapping seed, cotton thread glove and so on, or the pollen of the male parent should be collected and gently smeared on the stigma of the female parent with a small brush, and pollination should be carried out 3-4 times in full bloom.

To sum up, the time of sunflower flowering is in the early morning, that is, when the sun is about to rise. In addition, the flowering and cultivation of sunflowers need to be managed carefully.