Improve growth, yield and quality of Jerusalem artichoke tuber by controlled spectral distribution lighting with LED
In controlled environment crop production, light is one of the most important limited factors for plant growth. Light emitting diodes (LED) usually provide specific quality, quantity of light, and high intensity source of visible radiation for better growing in commercial horticultural plant production. The objective of this study was to examine growth and development of Jerusalem artichoke (Helianthus tuberosus L; JA) which was grown in controlled lighting conditions under different light source treatments, i.e., natural light (NL) as a control, red light LEDs (R), blue light LEDs (B), and red + blue LEDs (R+B), respectively. The results showed that the relative growth rate was the lowest under B light. The net assimilation rate and SPAD value were higher under R, B, and R+B lighting when compared with NL. Higher photosynthetic pigments were found in leaves of JA under R lighting. This condition seemly increased greater chlorophyll a and chlorophyll b than other light treatments. The higher carotenoids were found in JA under R, B, and R+B lighting treatment. JA grown under R, B, and R+B lighting were suitable for new tuber growth, as bigger size, higher fresh, and dry weight. Our findings demonstrated that LEDs light could enhance Jerusalem artichoke tuber yields and qualities in controlled conditions.
Seedapalee, T. and Hongpakdee, P. (2020). Improve growth, yield and quality of Jerusalem artichoke tuber by controlled spectral distribution lighting with LED. Acta Hortic. 1298, 397-404
LEDs, Jerusalem artichoke, pigment, new tuber