朔州市朔城区朔州紫球秋葱头栽培面积已突破2万亩,亩产达到3200公斤,经济效益较好。主要高产栽培技术如下。 1.育苗 育苗过程中要特别注意幼苗出土后温度的调节,把好放风关。当70％～80％幼苗出土后开始通风降温。畦内保持20～25℃。随外界温度的升高,逐渐加大通风口。 Shuozhou City, Shuozhou City purple purple onion fall onions cultivated area has exceeded 20,000 mu, 3200 kilograms per mu to achieve good economic returns. The main high-yielding cultivation techniques are as follows. 1. Nursery seedlings in the process of paying special attention to the regulation of the temperature after the emergence of young seedlings, the good blow off. When 70% to 80% of the seedlings began to ventilate and cool down after they were unearthed.畦 maintain within 20 ~ 25 ℃. With the outside temperature increases, gradually increase the vent.