大葱不宜开沟施肥大葱是一种需肥较多的蔬菜，一般从定植到收获需要追肥３～４次。长期以来，一些葱农都习惯于开沟追肥，这样，不仅容易划断大葱根须，而且还常常会因为施肥过于集中而发生烧坏大葱幼嫩须根，导致干尖和枯叶现象。根据大葱须根具有趋肥、趋水、趋温的生长... Green onions should not be ditching fertilization green onions is a fertilizer more vegetables, generally need to top-dressing 3 to 4 times from planting to harvest. For a long time, some onion farmers are accustomed to ditching the top dressing, so that not only easy to cut green onions, but also often because of excessive concentration of fertilizer and burned green onions, resulting in dry tip and dead leaves. According to the fibrous roots with fertilizer, water, warm growth ...