对珠江三角洲地区珠海、中山、江门等地露地种植的奶白菜、菠菜、菜心、西洋菜、芥兰、茼蒿和玻璃生菜等 7种叶菜类蔬菜硝酸盐 (NO3- )含量的分析结果表明 ,7个叶菜品种的硝酸盐含量都在1 2 0 0mg/kg以上 ,超过叶菜类蔬菜硝酸盐安全限量标准。同时 ,还探讨了导致珠江三角洲地区叶菜类蔬菜硝酸盐含量超标的原因以及降低硝酸盐含量的对策。 Analysis of nitrate content (NO3-) in seven leafy vegetables, such as milk cabbage, spinach, Brassica parauvera, sea cucumber, Chinese kale, Artemisia selengensis and glass lettuce planted in Zhuhai, Zhongshan and Jiangmen in the Pearl River Delta region The nitrate content of seven leafy vegetables was above 120 mg / kg, which exceeded the nitrate safety limit of leafy vegetables. At the same time, we also discussed the causes of excessive nitrate content in leafy vegetables in the Pearl River Delta and the countermeasures to reduce nitrate content.