硝酸盐的还原产物———亚硝酸盐在人体内积累可以降低血液的输氧能力,它与次级胺结合,转化成亚硝胺,是致癌性较强的一类有机化合物[1]。据报道,人体摄入的硝酸盐约81.2%来自蔬菜[2],因而蔬菜中硝酸盐含量高低与人类健康有密切关系。影响蔬菜硝酸盐含量的因子很多,内部因子 Nitrate reduction products --- nitrite accumulation in the human body can reduce the oxygen transport capacity of the blood, it is combined with the secondary amine, into nitrosamines, is a class of organic compounds more carcinogenic [1]. It is reported that about 81.2% of the nitrate ingested by the human body comes from vegetables [2]. Therefore, the nitrate content in vegetables is closely related to human health. Factors that affect the nitrate content of vegetables are many, internal factors