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为了提高洋葱品质，达到绿色蔬菜的标准，无公害洋葱栽培技术遵循以下操作规程。１优化选择基地土壤肥沃、有机质含量在２％以上，水利条件优越空气清洁、基地５km以内无三废污染源存在，且基地环境质量（大气、灌溉水、土壤）指标符合A级绿色食品产地环境质量NY／T３９１的要
In order to improve the quality of the onion and reach the standard of green vegetables, the pollution-free onion cultivation techniques follow the following rules. 1 The base of optimized selection is rich in soil with organic matter content above 2%, with excellent water conditions and clean air. No pollution sources exist within 5km from the base and the environmental quality of the base (atmosphere, irrigation water and soil) meets the environmental quality of Grade A green food producing area NY / T391 want