蔬菜种子的新鲜程度直接影响种子的发芽率,下面简述一些种子的感官鉴别法。1．白菜、萝卜等十字花科蔬菜新种子表皮光滑,有清香味,用指甲压开后成饼状,油脂较多,子叶浅黄色或黄绿色。陈种子表皮无光泽,发暗,常有一层白霜,用指甲压易碎而种皮易脱落,油脂少,子叶深黄色。 The freshness of vegetable seeds directly affects the seed germination rate, the following briefly describes the sensory identification of some seeds. 1. Cabbage, radish and other cruciferous vegetables new seed smooth skin, there are fragrance, pressed into a pie with nails, fat more cotyledons light yellow or yellow-green. Chen seed sub-surface dull, dark, often a layer of hoarfrost, with a brittle fingernail crust and easy to fall off, less fat, cotyledons dark yellow.