韭菜经过三四年的生长后，老根不断死亡，新根逐渐上移“跳根”，不仅影响对营养和水分的吸收，而且分率减少，产量大幅度下降。如采取剔除老死根的技术措施，既可减少新辟菜园的工作量，又可使老韭菜焕发青春，增产增效。 １、追好伤前肥。对田块较薄、年数较多的韭菜地，剔根 Leek after three or four years of growth, the root of the constant death, the new root gradually move up the “jumped root”, not only affect the absorption of nutrients and water, and the fractional reduction, a substantial decline in output. Take measures to eliminate old and dead roots can not only reduce the workload of the new provision of vegetable garden, but also make the old leek glow youth, increase production efficiency. 1, chase pre-injury fat. The plots of thinner, more leeks, pick roots