一、沟藏法大葱收获后就地晾晒数小时，除去根上的泥土，剔除病株、伤株，捆成10公斤左右的捆，在通风良好的地方堆放6天左右，使葱外表水完全阴干。与此同时，选择背阴通风处挖沟，沟深33厘米左右、宽150厘米左右，长度视贮量而定，沟距50～70厘米。若沟底湿度小，可浇一次透 First, the ditch possession of lawn shallot after harvest dry place a few hours, remove the roots of the soil, remove the diseased strains, wounds, bundled into about 10 kg of bundles, piled in a well-ventilated place for about 6 days, the onion surface water completely dry . At the same time, the choice of shade shade digging ditches, ditch about 33 cm wide and about 150 cm in length, depending on the storage may be, ditch 50 ~ 70 cm. If the bottom of the ditch moisture can be poured once thoroughly