LIANG Yi,HAO Wenqin,SHI Yu,et al.Effects of Exogenous Zinc on Growth and Quality of Hydroponic Lettuce Under Different Light Qualities[J].Northern Horticulture,2021,(18):7-13.[doi:10.11937/bfyy.20210872]
不同光质下外源锌对水培生菜生长和品质的影响
- Title:
- Effects of Exogenous Zinc on Growth and Quality of Hydroponic Lettuce Under Different Light Qualities
- Keywords:
- light quality; zinc; lettuce; growth; quality
- 文献标志码:
- A
- 摘要:
- 以‘意大利耐抽薹’生菜(Lactuca sativa L.)为试材,采用水培法,设置不同光质(红蓝光比例为4∶1、1∶2和全红光、全蓝光)和外源锌浓度(0、0.5、1.0 mg·L-1 ZnSO4·7H2O),研究不同光质下外源锌对水培生菜生长和品质特性的调控效应,以期为植物工厂在不同光质下施加外源锌提高蔬菜产量和品质提供参考依据。结果表明:高比例红光会促进生菜生物量、可溶性糖和还原糖的积累,并降低硝酸盐的含量,其中以红蓝光比例为4∶1的光质处理效果最好;高比例蓝光会促进光合色素和可溶性蛋白质含量的增加,其中以全蓝光处理效果最好,但全蓝光处理会对植株的生长产生抑制作用。从光质与Zn的互作效果看,光质对生菜生长和品质的影响起主导作用,外源Zn起调节作用。综合考虑,红蓝光比例为4∶1光质下根施0.5 mg·L-1 ZnSO4·7H2O处理对生菜的生长发育、产量提高以及品质改善的促进作用最佳。
- Abstract:
- Taking ‘Italian Resistant-bolting’ lettuce (Lactuca sativa L.) as the material,hydroponics was used as treatment.Different light qualities (red blue light ratio was 4∶1,1∶2 and full red,full blue) and exogenous zinc concentration (0,0.5,1.0 mg·L-1 ZnSO4·7 H2O) were set.The regulation effect of exogenous zinc on the growth and quality characteristics of lettuce in hydroponic culture under different light qualities was stuided,in orer to provide reference for plant factories to apply exogenous zinc under different light quality to improve vegetable yield and quality.The results showed that high proportion of red light could promote the accumulation of biomass,soluble sugar and reducing sugar,and reduce the content of nitrate in lettuce,and the light quality treatment with blue light ratio of 4∶1 had the best effect.High proportion of blue light could promote the increase of photosynthetic pigment and soluble protein,and the full bule light treatment had the best effect,but the full blue light treatment could inhibit the growth of the plant.From the interaction effect of light quality and Zn,light quality played a leading role in the growth and quality of lettuce,while exogenous Zn played a regulating role.In conclusion,root application of 0.5 mg·L-1 ZnSO4·7H2O with a ratio of red to blue light of 4∶1 had the best promoting effect on growth and development,yield improvement and quality.
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备注/Memo
第一作者简介:梁祎(1998-),女,硕士研究生,研究方向为设施蔬菜栽培生理。E-mail:185606163@qq.com.责任作者:张毅(1986-),男,博士,副教授,现主要从事设施蔬菜栽培生理等研究工作。E-mail:harmony1228@163.com.基金项目:教育部产学合作协同育人资助项目(202101331007);山西农业大学教学改革资助项目(YB-202116);山西省重点研发计划重点项目子课题资助项目(201703D211001-04-03)。收稿日期:2021-02-28