马铃薯又名土豆、地蛋,含有丰富的淀粉及其它营养素,是人们喜爱的主、副食。我国北方产量很高。一般食用非常安全。但由于未成熟或保存不当便可使其青紫、发绿或发芽,大量食后能使人中毒。一、毒性此类马铃薯之所以有毒,是因为马铃薯中的有毒物质——龙葵素(亦称马铃薯素)含量增高。马铃薯中龙葵素的正常含量仅0.01％左右,而未成熟或经日晒发青紫,发绿或贮存发芽时,含量可高达0.5％。龙葵素含量以芽、芽胚及芽孔周围的皮肉变绿、变紫 Potato, also known as potatoes, eggs, rich in starch and other nutrients, is the favorite main and non-staple food. The output of northern China is very high. General food is very safe. However, due to immature or improper preservation can make it purple, green or germination, after eating a large number of people can poison. I. Toxicity The reason why such potatoes are poisonous is that the content of solanine (also known as potato tuber) in potatoes is increased. The normal content of solanine in potatoes is only about 0.01%, while immature or sun bruise, green or stored germination, the content can be as high as 0.5%. Solanine content to buds, buds and buds around the skin become green, purple