近年来随着城市人民生活水平的提高,人们对于蔬菜品质的要求越来越高,蔬菜是人们食物中最易受到污染的,也是对人体健康影响最大,关系最密切的生物环境因素。全国许多大中城市对蔬菜污染现状进行了调查,开展了以消除农药污染为主的无公害蔬菜生产。大白菜生长周期短,病虫害多,用水、用肥、用农药量较大,所以很易受到污 In recent years, with the improvement of people’s living standards in cities, people are demanding higher and higher quality of vegetables. Vegetables are the most easily contaminated food in people and are also the most closely related bio-environmental factors to human health. Many large and medium-sized cities across the country investigated the status quo of vegetable pollution and carried out pollution-free vegetable production based on the elimination of pesticide pollution. Chinese cabbage growth cycle is short, pests and diseases, water, fertilizer, a large amount of pesticides, it is vulnerable to pollution