EFFECTS OF SUPPLEMENTAL LIGHT SPECTRA ON THE GROWTH  AND PRODUCTION OF MENTHA ARVENSIS L.

Hoàng Thị Hồng Nga; Vũ Thị Nghiêm; Tống Quang Công; Trần Quốc Tiến; Hà Thị Quyến; Chu Thị Thu Hà; Tống Khánh Hoà

doi:10.34238/tnu-jst.8701

EFFECTS OF SUPPLEMENTAL LIGHT SPECTRA ON THE GROWTH AND PRODUCTION OF MENTHA ARVENSIS L.

About this article

Received: 07/09/23 Revised: 24/10/23 Published: 31/10/23

Authors

1. Hoang Thi Hong Nga, Institute of Materials Science – VAST; University of Engineering and Technology - Vietnam National University Hanoi
2. Vu Thi Nghiem , Institute of Materials Science – VAST
3. Tong Quang Cong, Institute of Materials Science – VAST
4. Tran Quoc Tien, Institute of Materials Science – VAST
5. Ha Thi Quyen, University of Engineering and Technology - Vietnam National University Hanoi
6. Chu Thi Thu Ha, Institute of Ecology and Biological Resources -VAST
7. Tong Khanh Hoa, Institute of Ecology and Biological Resources -VAST

Abstract

This study aimed to assess the influence of various supplemental LED light spectra on the growth and fresh biomass yield of mint (Mentha arvensis L.) cultivated in the field. Two groups of combined spectra (R:B:UV = 70:20:10 and R:B:Fr = 70:20:10) with intensity levels of 100, 120, 150 µmol/m²/s and an additional lighting time of 6 hours/day were used. Significant improvements were observed in plant height, branch quantity, and fresh biomass yield. In particular, the formula containing far red light at 100 µmol/m²/s gave the most positive effect on the number of branches, reaching 17 branches per tree, and at 120 µmol/m²/s gave the highest height, with an average of 98.52 cm/ tree, compared to other conditions. After 9 weeks of additional lighting, in the UV spectrum group, fresh biomass yield was highest at an intensity of 120 µmol/m²/s, reaching 35.48 tons/ha, an increase of 31%, followed by 34.19 tons /ha, an increase of 26% at 150 µmol/m²/s, and finally 32.79 tons/ha at 100 µmol/m²/s, an increase of 21% compared to the control group. Meanwhile, at the far-red light spectrum group, the best fresh weight of 34.71 tons/ha at an intensity of 120 µmol/m²/s, an increase of 28%, followed by 32.52 tons/ha at the intensity of 150 µmol/m²/s, an increase of 20% and finally 30.71 tons/ha at the intensity of 100 µmol/m2/s, an increase of 13% compared to the control. These preliminary results highlight a significant boost in productivity with the use of supplemental LED lighting technology.

Keywords

LED lighting; Multi-spectra; Supplemental lighting; Fresh biomass; Mentha arvensis L.

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DOI: https://doi.org/10.34238/tnu-jst.8701

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