江苏省新沂县新安镇城关村采用塑膜中棚覆盖,使韭菜生产连年获得丰收,早春头刀韭菜由原来的4月收割,提前到1月上市。前四刀韭菜亩产增加到5000多公斤,使经济效益翻两番。中棚覆盖面积小,便于种植管理,能够及时调节湿度、温度,提高地温,促进韭菜生长,从12月中下旬即开始管理,棚架搭置可就地取材采用柳条、芦竹或 Chengguancun, Xin’an Town, Xinyi County, Jiangsu Province, adopts plastic film sheds to cover the leek production in successive years. The early leek leeks are harvested from April and advanced to the market in January. The first four leeks per mu increase to more than 5000 kilograms, so that economic benefits quadrupled. The shed covers a small area, easy to plant management, timely adjustment of humidity, temperature, increase ground temperature and promote the growth of leeks, from the beginning of December to begin management, scaffolding can be drawn locally using wicker,