为了提高洋葱品质,达到绿色蔬菜的标准,生产出无公害洋葱,生产过程中要掌握以下栽培技术。一、选择种植土壤洋葱种植基地应选择土壤肥沃、有机质含量在2%以上,水利条件优越,空气清洁的地方,种植基地5千米以内无三废污染源存在,且基地环境 In order to improve the quality of onions, green vegetables to meet the standards to produce pollution-free onions, the production process to master the following cultivation techniques. First, the choice of planting soil Onion planting base should choose a fertile soil, organic matter content of more than 2%, superior water conditions, clean air, planting base less than 5 km no tri-waste pollution exists, and the base environment