Effects of color led light intensities and different photoperiod regimes on growth of hydroponic lettuce (Latuca sativa L.)

Vo Thi Bich Thuy , Tran Thi Ba , Phan Ngoc Nhi * , Pham Ngoc Long , Tong Thi Sa Non and Le Vinh Thuc

* Corresponding author (phanngocnhi1989@gmail.com)

Article Sidebar

Full Text: PDF

Received: 18 Aug 2015
Revised: 19 Oct 2015
Accepted: 19 Feb 2016
Published: 28 Feb 2016
DOI: 10.22144/ctu.jen.2016.008
Views
295
Downloads
124
Crossref
Scopus
Google Scholar
Europe PMC
How to Cite
Vo, T. B. T., Tran, T. B., Phan, N. N., Pham, N. L., Tong, T. S. N., & Le, V. T. (2016). Effects of color led light intensities and different photoperiod regimes on growth of hydroponic lettuce (Latuca sativa L.). CTU Journal of Innovation and Sustainable Development , (02), 1-7. https://doi.org/10.22144/ctu.jen.2016.008
Issue
No. 02 (2016)

Main Article Content

Abstract

In this study, we examined the effect of lightintensity and light cycle on the growth of hydroponic leaf lettuce. Four light intensity treatment were using included 1 LED light NCM 3000K – purple LED: 75% red, 25% blue (48 μmol.m-2.s-1 PPFD - Photosynthetic photon flux  density); 2 LED lights NCM 3000K – purple LED: 75% red, 25% blue (80 μmol.m-2.s-1  PPFD); 3 LED lights D NCM01 L/30W – White LED (60 μmol.m-2.s-1 PPFD) and 3 LED lights NCM 3000K – purple LED: 75% red, 25% blue (115 μmol·.m-2.s-1  PPFD), with a combination of fivelight cycles 6/18, 9/15, 12/12, 18/6, 24/0 (light/dark). The result showed thatthe combination of 80-24/0 (2 purple LEDs – 24 hours light /0 hour dark) resulted highest fresh weight (34.93 g) and the seconds highest in the 60-24/0 (3 whiteLEDs -24 hours light /0 hour dark) and 80-18/6 (2 purple LEDs – 18 hours light /6 hour dark) treatment (28.95 and 27.22 g), while control 2 treatment (grown under sunlight) was 11.62 g. The main stem was highest at combined of 3 white LEDs with 24/0 and 18/6 treatments (26.18 and 20.04, respectively), while the numer of leaves (17.60 and 16.38 leaves), leaf length (10.31 and 10.97 cm) and leaf width (9.91 and 7.36 cm)at combined treatment of 2 purple LEDs with 18/6  and 24/0 were higher than most of anothers.The combination of 18/6 and 24/0 with 2 and 3 purple LEDs showed highest Chlorophyll value (3.92-4.75 µg/g), lowest at combination of 6/18 with four different light intensity (1.25-1.40 µg/g).
Keywords: LED light, Light intensity, Light cycle, leaf letture

Article Details

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

References

Buringh, P. and Dudal, R., 1987. Chapter 2 Agricultural land use in space and time. In: Wolman, M. G. and Fournier, F. G. A. (Eds). Land transformation in agriculture. Published by John Wiley & Sons Ltd. 9-43.

Cope, K.R.,Snowden, M.C. and Bugbee B., 2014. Photobiological interactions of blue light and photosynthetic photon flux: effects of monochromatic and broad-spectrum light sources. Photochem Photobiol. 90(3): 574-84.

Gupta, S.D. and Jatothu, B., 2013. Fundamentals and application of light – emitting diodes (LEDs) in invitro plant growth and morphogenesis. Plant Biotechnol Rep.7: 211-220.

Kang, J.H., Krishna, S.K., Atulba, S.L.S., Jeong, B.R. and Hwang, S.J., 2013. Light intensity and photoperiod influence the growth and development of hydroponically grown leaf lettuce in a closed - type plant factory system. Horticulture, Environment and Biotechnology. 54:501-509.

Li, H., Tang, C., Xu, Z., Liu, X. and Han, X.L., 2012. Effects of different light sources on the growth of Non - heading Chinese cabbage (Brassica campetris L.). Journal of Agricultural Science 4(4): 262-273.

Moran, R., 1982. Formula for determination of chlorophyllous pigments extracted with N, N-Dimethyl formamide. Plant Physiol. 69(6): 1376–1381.

Shimizu, H., Saito, Y., Nakashima, H., Miyasaka, J. and Ohdoi, K., 2011. Light environment optimization for lettuce growth in plant factory. IFAC World Congress. Milano (Italy). 605-609.

Shimokawa, A., Tonooka, Y., Matsumoto, M., Ara, H., Suzuki, H., Yamauchi, N. and Shigyo, M., 2014. Effect of alternating red and blue light irradiation generated by light emitting diodes on the growth of leaf lettuce, accessed on 20 Septemper 2015. Available from http://biorxiv.org/content/early/2014/02/28/003103

Yano Research, 2011. Plant factories in Netherlands and Japan: Research Findings in 2010. Yano Research Institute Ltd. 2-46-2 Honcho, Nakano-ku, Tokyo 164-8620, Japan.

Most read articles by the same author(s)