What is the structure of rape flower (number, color and smell of sepals, petals, pistils and stamens)? )

Sepals 4, green, slightly extended outward, arranged in 2 rounds, and the base of sepals in the inner round is slightly enlarged.

Petals 4, bright yellow, obovate, with obvious reticulate veins, arranged in a cross, with long claws.

Stamens 6, 4, arranged in 2 rounds.

Pistil 1, ovary superior, 1 cell, divided into false 2 cells by 1 membrane.

Inflorescences are scattered in racemes.

Silique, 2 ~ 4 cm long, about 5 mm in diameter, with a long beak at the top. Seeds are mostly black or dark reddish brown, sometimes yellow, subglobose and about 3 mm in diameter.

Smell: The smell is a little heavy, and the pollen smell is strong.

Extended data:

Propagation method of rape flower:

Sowing period: The sowing period in Hengshui, China is from early June to mid-August, and the harvest begins from mid-July to mid-September, and it only takes more than 30 days from sowing to the first harvest. The aftermoss can be harvested in stages, with continuous harvesting 10-20 days and growth period of 40-50 days. For example, arranging stubble times or planting stubble can also be harvested at one time.

Sowing: Chinese cabbage rape can be directly seeded or transplanted, and it is cultivated by direct seeding in hot and rainy summer and autumn. The amount of seeds used for sowing is about 500-600 grams per mu, and the sun is covered after sowing to prevent high temperature and rainy weather. Uncover the mulch immediately after the cotyledons are unearthed to avoid boring seedlings.

After emergence, apply fertilizer once when 1 true leaves unfold, and then water them. When there are 3 true leaves, interplant them in time and plant them when the cotyledons grow to 4-5. The plant spacing is13×15cm. Topdressing twice at seedling stage, and the moisture content shall be subject to keeping the border surface moist. In order to reduce the soil temperature and benefit the growth of seedlings, water should be sprayed in the early, middle and late stages of seedling.

Baidu encyclopedia-rape flower

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