水飞蓟,又名水飞雉,为菊科草本药用植物,从其果实中提取得到的水飞蓟素对多种肝脏损伤有明显的保护作用。水飞蓟原产于地中海地区(北纬35°～45°),1972年引入我国。苗期耐低温,遇霜冻时叶色变暗,当气温回升后又恢复正常,无冻害现象,但过低温度也会对其造成伤害。水飞蓟苗期可 Silybum marianum, also known as Feifei pheasant, is a medicinal herbaceous plant of Asteraceae. Silymarin extracted from its fruit has obvious protective effects on various liver injuries. Milk thistle native to the Mediterranean region (latitude 35 ° ~ 45 °), introduced to China in 1972. Low seedling temperature, the case of frost when the dark leaves, when the temperature rose back to normal, no frost damage, but too low a temperature can cause harm to them. Silybum marianum can be