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甜菜播种后经过一段时间即可发芽。发芽后的甜菜一对细小而狭长的子叶由胚轴拖出地面迅速展开,并逐渐由浅黄色变成绿色。此时幼根垂直向下急剧深扎,吸收土壤中水分和养分。子叶乃是出苗后最初的同化器官,吸收空气中的二氧化碳利用阳光和水在叶绿素及酶的作用下进行光合作用。这样大体上经8—10天以后从一对子叶之间长出成对的真叶,再过10—12天后,生出第三、第四对真叶,以后的叶片就以单数一片一片地长出。
Beets germinate after a period of time after sowing. After germination of a pair of small and narrow cotyledons from the hypocotyl dragged out of the ground quickly, and gradually from light yellow to green. At this point, the root of the root vertical sharp downward deep bar, absorb soil moisture and nutrients. Cotyledons are the first assimilation organs after emergence, absorbing the carbon dioxide in the air using sunlight and water for photosynthesis under the action of chlorophyll and enzymes. So basically after 8-10 days from a pair of cotyledons grow between pairs of true leaves, and then 10-12 days, give birth to the third and fourth pairs of true leaves, after the leaves on a single one piece long Out