Investigation on Nitrate Content of Vegetables of Non-envorimental-pollution Vegetable Base in Western Chongqing

The nitrate of vegetables of non-envorimental-pollution vegetable base in western Chongqing were investigated.The results showed that the nitrate concentrations in vegetable samples was in turn green leaf vegetables(810.2 mg/kg)onion garlic vegetables(631.9 mg/kg)root vegetables(571.8 mg/kg)fruit vegetables(307.6 mg/kg)melon vegetables(289.1 mg/kg).The vegetables investigated were polluted at different extent by nitrate,but not serious;The green leaf vegetables were the worst polluted,belonged to middle pollution,then root vegetables and onion garlic vegetables were worse than other vegetables,and most of fruit vegetables and melon vegetables were not polluted by nitrate.