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硝酸盐过剩,会给人体带来不良影响。苏联卫生部制定的最大摄取量为4mg/kg(长期以来平均日摄取量)。作物种类及同一种类作物体内位置的不同,硝酸盐的含量也有差异。谷物中的谷粒里大部分不含硝酸盐,主要在生育过程中集中于营养器官和多汁的果实部分。同一植物体内老叶比幼叶多,茎、叶柄比叶子多。菠菜叶柄的硝酸盐含量是叶片的3.5倍,芜荽是12倍,草茴香是4.5倍,甘蓝茎的顶部最多,叶子中外叶含量是内叶的2倍。在葫芦科里,果实硝酸盐的含量多,同一果实内,果梗部位含量多,相对的另一侧含量少,而且果实的中心部少,边缘部多,果腔、种子含量比果
Excess nitrate, will bring adverse effects on the human body. The maximum intake set by the Soviet Ministry of Health is 4 mg / kg (long-term average daily intake). Crops and the same type of crop body location differences, nitrate content is also different. Most of the cereal grains are free of nitrate and are mainly concentrated in vegetative organs and juicy fruit portions during reproduction. In the same plant, the old leaves are more than the young leaves, and the stems and petioles are more than the leaves. The nitrate content of spinach petioles is 3.5 times that of leaves, 12 times for turnips, 4.5 times for fennel plants, most on the top of cabbage stems, and twice as much as for inner and outer leaves. In the Cucurbitaceae, the content of nitrate in fruit is more than that in the same fruit, the content of fruit stems and stems is more in the same fruit than in the other fruit, and the center of the fruit is less and the margin is more.