近年来,广东省原先仅在冬春季节零星种植的葱类作物,已成为大量、长年种植的品种,有的地方如南海还涌现了种葱专业村。在葱的管理上,最常见的问题是葱的叶尖干枯。产生葱叶干枯的原因有以下两种。一、生理性因素。包括:长期施用化肥,有机肥极少使用,易导致土壤酸化,致使叶片生 In recent years, Guangdong Province, originally only in spring and winter sporadic planting of onion crops, has become a large number, long-term cultivation of varieties, in some places, such as the South China Sea also emerged species of Onion specialty village. Onion management, the most common problem is that the tip of the onion dry. There are two reasons for dry onion leaves. First, physiological factors. Including: Long-term application of fertilizers, organic fertilizer rarely used, easily lead to soil acidification, resulting leaves