[Objective] This study was conducted to investigate the effects of water and fertilizer coupling on growth and sound seedling index of green cabbage seedlings. [Method] A seedling-raising orthogonal test was carried out on green cabbage under different irrigation upper limits and different substrate nutrient levels. [Result] Proper irrigation could promote leaf expansion, while excessive irrigation wa- ter inhibited leaf expansion; fertilization inhibited leaf expansion; and water and fertil- izing coupling showed a superimposed effect on leaf expansion. Proper irrigation promoted stem and root growth; fertilization inhibited stem and root growth; and there was a very strong water and fertilizer interaction effect. Under more irrigation water and proper fertilizing amount, root growth was promoted, stem elongation was inhibited, material accumulation of plants was increased, and sound seedling index was improved. [Conclusion] Water and fertilizer coupling effect could be used for regulating growth and development of various organs of green cabbage and improv- ing seedling-raising efficiency and quality.
