The orthogonal design,L_8(27),was adopted to study the effects of gibberellin(GA),ammonium molybdate(Mo)and dicyandiumide(DCD)on the yield,nitrate content and nutritive quality of lettuce.

• 采用L8(27)正交设计研究了3种化学物质赤霉素(GA)、钼酸铵(Mo)、双氰胺(DCD)对盆栽莴笋产量、硝酸盐含量和营养品质的影响。