当今，营养知识的普及，保健意识的提高．不少人都在追求饮食的营养、卫生和科学、合理。很多家庭厨房里，除常见的大米面粉、豆腐白菜、鸡鸭鱼肉分，也有黑白木耳、平菇香菇等菌菇，菠菜蔬菜、南蒿茗菜等野菜了。每当有传媒宣传某种绿色食品或黑色食品乃至微量元素含量多的食? Nowadays, the popularization of nutritional knowledge and the improvement of health awareness. Many people are in the pursuit of diet nutrition, health and science, reasonable. A lot of family kitchen, in addition to the common rice flour, cabbage tofu, poultry and duck points, but also black and white fungus, Mushroom mushrooms mushrooms, spinach, vegetables, Artemisia Namcai and other wild vegetables. Whenever there is a media promotion of a green food or black food and trace elements content of food?