Effects of light quality on growth and quality of lettuces in hydroponic

2015 12th China International Forum on Solid State Lighting (SSLCHINA) Pub Date : 2015-11-01 DOI:10.1109/SSLCHINA.2015.7360712

Roy C. Y. Chen, Houcheng Liu, Shiwei Song, Guangwen Sun, R. Chen

{"title":"Effects of light quality on growth and quality of lettuces in hydroponic","authors":"Roy C. Y. Chen, Houcheng Liu, Shiwei Song, Guangwen Sun, R. Chen","doi":"10.1109/SSLCHINA.2015.7360712","DOIUrl":null,"url":null,"abstract":"The effects of light quality on growth and quality of lettuce in hydroponic were studied. There were 3 treatments: white LED as control (CK), white-red LED (R: W=1:4) (T1), red-white LED (R:W=1:1) (T2) (red LED light 660 ± 20 nm). The PAR (Photosynthetically Active Radiation) was 150 μ mol.m-2.s-1, irradiation duration: 6:30-18:30. The lettuces were grown 35 days under different light treatment. The results showed that the growth and quality of lettuce were significantly affected by light quality treatment. The growth of shoot and root in hydroponic lettuce were enhanced by red light, and increased with the ratio of red light increased. The fresh weight of shoot increased by 34.6% and 52.7%, and that of root by 46.9% and 97.8% in T1 and T2 treatment respectively. And the dry weight of shoot increased by 40.3% and 66.7%, and that of root by 62.5% and 91.7% in T1 and T2 treatment respectively. The contents of soluble sugar and Vitamin C increased under red light, and increased with the ratio of red light increased. The soluble sugar concentrations in lettuce increased by 19.8% and 94.7%, and Vitamin C concentration by 76.7% and 97.4% in T1 and T2 treatment respectively. The nitrate concentrations decreased under red light, and decreased with the ratio of red light increased. The nitrate concentrations in lettuce decreased by 37.8% and 40.1% in T1 and T2 treatment respectively. Thus more red light is benefit for the growth and quality of lettuce in hydroponic.","PeriodicalId":331882,"journal":{"name":"2015 12th China International Forum on Solid State Lighting (SSLCHINA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 12th China International Forum on Solid State Lighting (SSLCHINA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SSLCHINA.2015.7360712","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 10

Abstract

The effects of light quality on growth and quality of lettuce in hydroponic were studied. There were 3 treatments: white LED as control (CK), white-red LED (R: W=1:4) (T1), red-white LED (R:W=1:1) (T2) (red LED light 660 ± 20 nm). The PAR (Photosynthetically Active Radiation) was 150 μ mol.m-2.s-1, irradiation duration: 6:30-18:30. The lettuces were grown 35 days under different light treatment. The results showed that the growth and quality of lettuce were significantly affected by light quality treatment. The growth of shoot and root in hydroponic lettuce were enhanced by red light, and increased with the ratio of red light increased. The fresh weight of shoot increased by 34.6% and 52.7%, and that of root by 46.9% and 97.8% in T1 and T2 treatment respectively. And the dry weight of shoot increased by 40.3% and 66.7%, and that of root by 62.5% and 91.7% in T1 and T2 treatment respectively. The contents of soluble sugar and Vitamin C increased under red light, and increased with the ratio of red light increased. The soluble sugar concentrations in lettuce increased by 19.8% and 94.7%, and Vitamin C concentration by 76.7% and 97.4% in T1 and T2 treatment respectively. The nitrate concentrations decreased under red light, and decreased with the ratio of red light increased. The nitrate concentrations in lettuce decreased by 37.8% and 40.1% in T1 and T2 treatment respectively. Thus more red light is benefit for the growth and quality of lettuce in hydroponic.

查看原文本刊更多论文

光质对水培莴苣生长和品质的影响

研究了光品质对水培莴苣生长和品质的影响。三种处理:白光LED作为对照(CK)、白光LED (R:W= 1:4) (T1)、红光LED (R:W=1:1) (T2)(红色LED光660±20 nm)。PAR(光合有效辐射)为150 μ mol.m-2。S-1、照射时间:6:30-18:30。不同光照条件下，生菜生长35 d。结果表明，光质处理对生菜的生长和品质有显著影响。红光对水培莴苣的茎、根生长均有促进作用，且随红光比的增加而增加。在T1和T2处理下，茎鲜重分别提高了34.6%和52.7%，根鲜重分别提高了46.9%和97.8%。在T1和T2处理下，茎干质量分别提高了40.3%和66.7%，根干质量分别提高了62.5%和91.7%。在红光照射下，可溶性糖和维生素C含量增加，且随红光照射比的增加而增加。在T1和T2处理下，生菜可溶性糖浓度分别提高了19.8%和94.7%，维生素C浓度分别提高了76.7%和97.4%。硝态氮浓度在红光照射下呈下降趋势，且随红光照射比的增加而下降。在T1和T2处理下，生菜中硝酸盐浓度分别下降了37.8%和40.1%。因此，在水培条件下，红光多有利于生菜的生长和品质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2015 12th China International Forum on Solid State Lighting (SSLCHINA)

自引率

0.00%

发文量