Authors : Napat Watjanatepin and Patcharanan Sritanauthaikorn
Abstract: The objective of this study is to investigate the interaction of R, B and FR from phosphor-converted LED on the growth and yield of the sweet basil and holy basil. Seedlings were grown in the chamber with a continuous supply of 200 μmolm–2 sec–1 PPFD of R and B. Several ratios were applied as R:B.3.5 and 7.0 without FR and R:B.3.5 with FR 50 μmolm–2 sec–1. The photo period was 16/8 h. The results found that R:B.3.5 with FR50 significantly increased the growth rate by 49-114%, the plant height by 64-137%, the stem diameter by 20–25% and the total fresh weight by 98-181% of the crops. R:B.3.5 with FR50 also significantly increased the average leaf area by 59-85% for the holy basil but not in the sweet basil and increased the total dry weight by 110–253% of the sweet basil but not in the holy basil. Additionally, no effects on the leaf thickness of the crops were observed. R:B.7 without FR had the trend to promote the growth of leaf and stem and total fresh weight of the crops than R:B.3.5 without FR. Moreover, the combination of FR with the R and B light could increase the leaf expansion, stem length whole plant photosynthesis and total fresh and dry weight of the sweet basil and holy basil.
Napat Watjanatepin and Patcharanan Sritanauthaikorn, 2020. Increasing Growth and Yield of Sweet Basil and Holy Basil by Application of Far-Red Radiation for Indoor Horticulture. Journal of Engineering and Applied Sciences, 15: 1709-1716.