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青菜又名普通白菜、小白菜、油菜等,属十字花科芸苔属白菜亚种,普通白菜变种,二年生或一年生蔬菜。 青菜生长期短,营养丰富,适应性强,易种植。鲜食、腌渍均可,深受市民喜爱。 一、植物学特征 须根发达,分布较浅,再生力强,宜育苗移栽。营养生长期为短缩茎,花芽分化后遇高温茎节伸长而抽苔。叶柔嫩多汁,其形态、叶色因品种而异,叶色浅绿至墨绿,叶面光滑全缘,叶柄肥厚扁平,柄色白、绿白、浅绿或绿色,内轮叶片舒展或近叶身处束腰状,基部形成蔀头（菜蔀头）,真叶多数叶片以 2/5或3/8叶序排列。单株成叶数在 10-15片左右构成产量。 二、生物学性状 种子在15—30℃下经1-3天发芽,发芽适温为20-25℃。种子发芽后,茎端每隔一定天数分化一枚新叶,单株叶数可达20-30片,但对产量起作用的是15片左右的成长叶。青菜性喜冷凉,平均气温在18-20℃下生长最佳,15℃以下经一定天数茎端开始花芽分化。幼根的生长适温为26℃。对土壤要求不严,以富含有机质、保水保肥力强的土壤为宜。要经常保持合适的水分,青菜才能良好生
Green vegetables, also known as ordinary cabbage, Chinese cabbage, rape, etc., belong to the Brassicaceae Brassicaceae subspecies of common cabbage varieties, biennials or annual vegetables. Green vegetables short growth period, nutrient-rich, adaptable and easy to grow. Fresh, pickled can be loved by the public. First, the characteristics of the developed fibrous roots, shallow distribution, strong regeneration, should be transplanted seedlings. Vegetative growth period is shortened stems, flower buds after differentiation of high temperature stem elongation and bolting. Leaves soft and juicy, its shape, leaf color varies according to the species, leaf color light green to dark green, smooth and full leaf surface, petiole hypertrophy flat, handle color white, green and white, light green or green, inner leaf blade stretch or near leaf In a beam-like, the base to form the head (head), the true leaves most of the leaves to 2/5 or 3/8 leaf order. Leaves into a single plant in the number of 10-15 form the output. Second, the biological properties of seeds at 15-30 ℃ by 1-3 days germination, germination suitable temperature 20-25 ℃. After the seeds germinated, the stem ends differentiate a new leaf every several days, with the number of leaves per plant up to 20-30, but about 15 leaves are responsible for the yield. Green vegetables like cold, the average temperature of 18-20 ℃ growth of the best, below 15 ℃ after a certain number of days to start bud stem differentiation. Young root growth temperature is 26 ℃. Strict requirements on the soil, rich in organic matter, water and soil fertility and strong soil is appropriate. To maintain proper moisture, vegetables can be good students