【摘要】 为探究不同LED光质对沙葱生长、产量及品质的影响，以不补光为对照(CK)，设置白光(W)、红光(R，660 nm)、绿光(G，520 nm)、蓝光(B，450 nm)、红蓝组合光R∶B=9∶1(RB9∶1)、红蓝组合光R∶B=7∶3(RB7∶3)6种光质，在日光温室于夜间(18：30—23：30)进行5 h顶部补光，测定株高、茎粗、产量、类黄酮含量、花青素含量、可溶性糖含量、抗坏血酸含量等指标，分析沙葱生长、产量和品质变化。结果表明：RB7∶3处理在提升沙葱品质与促进生长发育方面效果显著，与对照相比，其类黄酮、花青素、可溶性糖、蔗糖、总酚和抗坏血酸含量分别增加73.25%、14.59%、24.76%、70.01%、36.74%和20.65%；产量、株高、茎粗分别提高54.55%、22.66%和12.97%。同时，RB7∶3处理可有效抑制沙葱中丙二醛含量的上升，较对照降低12.81%。Pearson相关性分析表明，类黄酮含量是反映沙葱生长发育和品质优劣的关键指标。主成分分析综合评价结果显示，RB7∶3处理综合得分最高。综上，补光处理能显著促进沙葱生长发育，提升其品质与产量，其中RB7∶3处理为最佳光环境调控方案。更多还原

【Abstract】 To investigate the effects of different LED light qualities on the growth，yield，and quality of Allium mongolicum Regel，a no-supplemental-light control(CK)was compared with six supplemental light treatments：white light(W)，red light(R，660 nm)，green light(G，520 nm)，blue light(B，450 nm)，red∶blue=9∶1(RB9∶1)，and red∶blue=7∶3(RB7∶3).Supplemental lighting was applied from the top for 5 hours nightly(18：30 to 23：30)in a solar greenhouse.Measurements included plant height，stem diameter，yield，flavonoid content，anthocyanin content，soluble sugar content，and ascorbic acid content.Results demonstrated that the RB7∶3 treatment significantly enhanced both quality and growth.Compared to CK，RB7∶3 increased flavonoid，anthocyanin，soluble sugar，sucrose，total phenol，and ascorbic acid contents by 73.25%，14.59%，24.76%，70.01%，36.74%，and 20.65%，respectively.Yield，plant height，and stem diameter increased by 54.55%，22.66%，and 12.97%，respectively.Concurrently，RB7∶3 effectively suppressed malondialdehyde(MDA)accumulation，reducing it by 12.81% versus CK.Pearson correlation analysis identified flavonoid content as a key indicator reflecting growth and quality.Principal component analysis ranked RB7∶3 highest in comprehensive evaluation score.Collectively，supplemental lighting significantly promotes Allium mongolicum Regel growth and improves its quality and yield，with RB7∶3 representing the optimal light environment regulation strategy.更多还原