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对田间发现的胡萝卜雄性不育株作了调查与观察，并与可育株作了形态特征比较．结果表明：（1）胡萝卜雄性不育株占群体总株数的0．786％．（2）不育花花瓣为绿色，雄蕊为绿色瓣化型，不完全花瓣状，无花丝、花粉；花柱、柱头及子房完全被花瓣状结构所包裹，不易被发现．可育花花瓣为白色，花丝细长、白色，白色花药肥厚，布满花粉；花柱、柱头及子房明显．并观察到不育株育性对温度具敏感性．
The carrot male sterile plants discovered in the field were investigated and observed, and morphological characteristics were compared with that of fertile plants. The results showed that: (1) male sterile male carrots accounted for 0.786% of the total number of the population. (2) The petals of sterile flowers are green, and the stamens are green petal-shaped, not completely petal-shaped, without filaments and pollens; the style, stigma and ovary are completely covered by the petal-like structure and are not easily found. Fertile flower petals are white, filaments slender, white, white anthers hypertrophy, covered with pollen; style, stigmas and ovaries significantly. The fertility of sterile plants was observed to be sensitive to temperature.