中国草地学报2025，Vol.47Issue(5)：78-88,11.DOI:10.16742/j.zgcdxb.20240236
光照模式对紫花苜蓿产量品质和生理活性及氮代谢的影响
Effects of Light Modes on the Yield Quality,Physiological Activity,and Nitrogen Metabolism of Medicago sativa
摘要
Abstract
In this research,effects of three light modes of LED red,blue,and green light spectrum at 23.328 mol/(m2·d)DLI(conventional light with 18 h/6 h,red∶blue∶green=280∶70∶10;continuous light with 24 h/0 h,red∶blue∶green=210∶52.5∶7.5;and alternating light with three light spectra:24 h/0 h,red∶blue∶green=525∶15;red-green light∶blue light=435∶105;green and blue light∶red light=120∶420)on yield quality,physiological activity,and nitrogen metabolism were determined in an controlled environ-ment plant factory with artificial light.The results demonstrated the adaptability of alfalfa to continuous light.Compared with conventional lighting,healthy morphology and maintained yield were observed in alfalfa under continuous lighting,along with increased soluble sugar and starch content.However,decreases occurred in photosynthetic pigment content,stomatal conductance,and Fv/Fm,without exces-sive accumulating of H2O2 and malondialdehyde.Further data showed that the alternation of red/blue-green light promoted leaf expansion,the alternation of red/green-blue light promoted stem elongation,and the alternation of green/blue-red light shortened the flowering time.In terms of nitrogen metabolism,nitrate nitrogen content was significantly reduced under continuous and green/blue-red light alternation,while ammonium nitrogen content was significantly increased under red/green-blue light alternation.Activ-ity of nitrate reductase was significantly reduced under red/blue-green light alternation,while red/green-blue light alternation significantly reduced nitrite reductase activity.The activity of nitrogen metabolism enzymes was inhibited by continuous and alternating lighting,whereas the content of soluble protein,free amino acids,and crude protein in alfalfa were increased.In summary,continuous lighting and alternating lighting patterns are suitable for the production of alfalfa in plant factory with artificial light.关键词
紫花苜蓿/植物工厂/连续光照/交替光照/生理活性/氮代谢Key words
Alfalfa/Plant factory/Continuous light/Alternating light/Physiological activity/Nitro-gen metabolism分类
农业科技引用本文复制引用
陈艳琦,林坤明,刘文科..光照模式对紫花苜蓿产量品质和生理活性及氮代谢的影响[J].中国草地学报,2025,47(5):78-88,11.基金项目
中国农业科学院科技创新工程(CAAS-IEDA-T07) （CAAS-IEDA-T07）
