The growth process of dandelion

Dandelion is a perennial perennial plant, which can blossom and seed in biennial plants, and the early summer is the flowering and seed-setting period. The number of flowers per plant increases with the increase of growth years. Some plants spend more than 65,438+00, and the seeds will mature 65,438+03-65,438+05 days after flowering. The shell of the disk changes from green to yellow-green, and the seeds can be harvested from ivory to brown. Never wait for the disk to crack before harvesting, otherwise the seeds will easily be scattered and lost. Generally, the number of seeds per flower head is above 100. The 1000-grain weight of dandelion seeds is about 2g, and the grain weight of dandelion seeds is about 0.8-1.2g..

When collecting seeds, you can take off the dandelion flowerpot, store it indoors and cook it for a day. When the flowerpot is completely scattered, dry it in the shade for 1-2 days until the seeds are half dry, wipe off the fluff at the tip of the seeds by hand, and then dry the seeds. Dandelion can also be cultivated by digging roots in places rich in wild resources. Usually in June 5438+10, the roots were dug and planted in the greenhouse with row spacing of 8 cm ×3 cm. After planting, pour enough water until it germinates in February of the following year. At this time, if organic fertilizer is applied again, the leaves can be listed.

Mature dandelion seeds have no dormancy period and can be sown from early spring to midsummer. On sunny days (about 28 degrees), mix the seeds with the soil, thoroughly water them, expose them to the sun until the soil is slightly wet, and then properly water them to keep them moist. The mesocarp will turn green the next day and take root and sprout a few hours later.

According to the test results, it takes 10-20 days to sow seeds immediately after harvesting at the end of May. Summer is extended to July and August, and it takes 15 days from sowing to emergence. The sowing amount is generally about 3 grams per square meter, which can protect 700- 1000 plants.

Before sowing dandelion, you should turn over the soil and make a ditch. The width of the border is 80-90 cm, and a shallow ditch is opened in the border, with the ditch spacing of 12 cm and the width of 10 cm. Then sow in the ditch, and cover the soil with a thickness of 0.3-0.5 cm after sowing. When sowing, the soil should be wet. If the soil is dry, it should be watered two days before sowing. It is best to cover spring sowing with plastic film, but it is not necessary to cover summer sowing with sufficient rain.

Dandelion is very resistant to diseases, droughts and insects, and generally does not need pest control. The focus of field management is mainly fertilizer and water. Although dandelion does not require high soil conditions, it still likes fertile, moist, loose soil with high organic matter content. Therefore, when planting dandelion, ammonium nitrate 17-20kg should be applied as base fertilizer per mu. After sowing, we should always keep the soil with proper humidity. Top dressing should be 1-2 times in the growing season. Generally, leaves are not picked in the same year of sowing, so as to promote its vigorous growth, so that plants will sprout vigorously in early spring next year, and the tender leaves produced will be of good quality and high yield.

In early spring, when the ground temperature at the depth of 5 cm in the topsoil reaches 1 ~ 2 degrees, dandelion planted last year begins to sprout and grow new buds. Generally, the buds in front of Tomb-Sweeping Day are exposed on the ground. At this time, the length of "white buds" in the soil is 3-4 cm, so wild dandelion can be listed around April 20. At this time, there are few fresh leafy vegetables in the market, which are very popular with consumers.