一是窖贮马铃薯,薯块表皮部分变成青绿色,俗称“青头楞”原因是薯块暴露在土表被阳光直射,皮部变色;或者收获后,被阳光直射照成的。这种变色的薯块含有龙葵素,是一种对人有害的生物碱。据测马铃薯在光照下贮藏四周,龙葵素的含量能从 First, cellar storage of potatoes, tubers part of the epidermis into a turquoise, commonly known as “green head Leng” because the potato is exposed to the earth surface was exposed to direct sunlight, skin discoloration; or after harvest, direct sunlight into. This discolored potato contains solanine, a harmful alkaloid. According to the measured potatoes stored in the light for four weeks, solanine content can be from