The Impact of LED Light Spectrum on the Growth, Morphological Traits, and Nutritional Status of ‘Elizium’ Romaine Lettuce Grown in an Indoor Controlled Environment

Matysiak, B.; Kaniszewski, S.; Dyśko, J.; Kowalczyk, Waldemar; Kowalski, Artur; Grzegorzewska, M.

doi:10.3390/agriculture11111133

Cited by 18 publications

(11 citation statements)

References 69 publications

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“…Consequently, we can suggest the cultivation of the red lettuces in a UVblock greenhouse and adding 425 kJ m −2 d −1 of supplemental UV-A lighting 10 days prior to harvest. LED lights have great potential to provide supplemental light more efficiently than traditional lights, and their spectrum can be adjusted based on plant growth requirements [30]. Additionally, LEDs allow potential control of both irradiance and spectra and, when used in fully enclosed environments, photoperiod [13], so the results of the current study can be applied to both greenhouse and plant factory cultivations.…”

Section: Discussionmentioning

confidence: 99%

Ultraviolet Radiation Management in Greenhouse to Improve Red Lettuce Quality and Yield

et al. 2022

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The intensity of ultraviolet (UV) radiation affects the yield and quality of red lettuce. The current study aimed to develop a UV management system in a greenhouse to achieve high yield and quality in red lettuce production. The study consisted of two experiments. In the first experiment, the effects of the different UV transparencies of the plastic materials covering the greenhouse on plant growth and the concentration of antioxidants in red lettuce were studied. For this purpose, two greenhouses were covered with polyethene of different transparencies to UV radiation. One greenhouse was covered with a common type of polyethene transparent in a large spectrum of UV radiation (UV-open), while the second greenhouse was covered with polyethene untransparent to ultraviolet radiation (UV-block). The plants were grown in a deep flotation hydroponic system. At the end of the cultivation, plant growth measurements, leaf colour measurements, and the determination of antioxidant components’ concentration were carried out. Red lettuce plants harvested 42 days after planting had an average head weight 42% greater in the UV-block greenhouse compared to plants grown in the UV-open greenhouse. However, the red leaf colour of plants in the UV-block greenhouse lagged significantly compared to that in the UV-open greenhouse. Moreover, the total phenolic content, the total flavonoid content, and the antioxidant capacity of the lettuce leaves in the UV-block greenhouse were significantly lower compared to the corresponding values of the plants in the UV-open greenhouse. During the second experiment, a new cultivation system of red lettuce, which combined a UV-block polyethene film as a greenhouse cover and a pre-harvested supplemental UV light, was tested. For this purpose, various doses of supplemental UV lighting were tested in the UV-block greenhouse for ten days prior to harvest. From these tests, it emerged that applying supplemental UV lighting with a dose of 425 kJ m−2 d−1 for ten days before harvest produces red lettuces of the same quality as those produced in a UV-open greenhouse. This technique of growing red lettuce increases its yield by 30% without a negative effect on the quality of the product.

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Section: Discussionmentioning

confidence: 99%

Ultraviolet Radiation Management in Greenhouse to Improve Red Lettuce Quality and Yield

et al. 2022

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“…According to Liu et al (2020), light intensity up to 200 μmol m −2 s −1 on lettuce plants increases the content of N, P, Ca, Mg, Fe, Mn, Cu, and Zn elements in the shoot of the lettuce plant. Moreover, the use of light combination 70:18:12 (blue: green: red) caused a significant increase in leaf biomass but prevented the accumulation of K and Mg elements in the leaf of lettuce plant (Matysiak et al, 2021). They noted that the multiple combinations of light quality (red-, green-, and blue-light spectrum) in the stages close to lettuce harvest caused a significant decrease in the content of K, P, and NO 3 − content, but the content of Ca showed a significant increase (Matysiak et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Spectral composition of LED light differentially affects biomass, photosynthesis, nutrient profile, and foliar nitrate accumulation of lettuce grown under various replacement methods of nutrient solution

Soufi,

Roosta,

Fatehi

et al. 2023

Food Science & Nutrition

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To enhance crop yield and quality, plant cultivation in controlled‐growing systems is an alternative to traditional open‐field farming. The use of light‐emitting diode (LED) as an adjustable light source represents a promising approach to improve plant growth, metabolism, and function. The objective of this study was to assess the impact of different light spectra (red, red/blue (3:1), blue, and white) with an emission peak of around 656, 656, 450, and 449 nm, respectively, under various replacement methods of nutrient solution (complete replacement (CR), EC‐based replacement (ECBR), and replacing based on plant needs (RBPN)), on biomass, physiological traits, and macro‐ and micronutrient contents of two best‐known lettuce varieties, Lollo Rossa (LR) and Lollo Bionda (LB), in the nutrient film technique (NFT) hydroponic system. The results indicated that mix of red and blue LED spectra under RBPN method is the most effective treatment to enhance fresh and dry weights of lettuce plants. In addition, red LED spectrum under RBPN, and red and blue light under ECBR nutrient solution significantly increased leaf stomatal conductance, net photosynthesis and transpiration rate, and intercellular CO2 concentration of LR variety. Phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mn) content in LR variety, and iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn) content in both varieties increased upon exposure to blue and red LED light spectrum with RBPN method. Our results suggest that exposure to combination of red and blue light along with feeding plants using RBPN and ECBR methods can increase absorption of macro‐ and micronutrient elements and improve photosynthetic properties, and eventually increase lettuce yield with lower nitrate accumulation.

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“…Additionally, the content and composition of bioactive compounds in plants can be influenced by cultivation and management conditions (Ju et al 2022). Specifically, growth environments play a significant role in determining the level of bioactivity in vegetables and can potentially impact their health-promoting and sensory attributes (Matysiak et al 2021). However, previous studies have primarily focused on abiotic factors such as light, temperature, humidity, cultivation period, and growth regulators (Bermejo and Munne-Bosch 2023;Matysiak et al 2021;Pignata et al 2020).…”

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confidence: 99%

Effects of the Mixed Seeding Rate of Milkvetch on Fertilizer Substrate, Growth, and Carotenoid Levels of Baby Leaf Vegetables in Vertical Indoor Farming

Ju,

Jin,

Yoon

et al. 2024

horts

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During this study, an indoor experiment was conducted to determine the effect of mixed seeding rates of legumes used as green manure on the substrate fertilizer, growth characteristics, and bioactive compounds of baby leaf vegetables. The mixed seeding treatment was designed for milkvetch (Astragalus sinicus L.), tatsoi (Barassica rapa L.), kale (Brassica oleracea var. sabellica L.), and spinach (Spinacia oleracea L.) using five rates for each. Accordingly, a total of 15 treatments (3 baby leaf species × 5 mixed seeding rates) were constructed using a randomized complete block design with three replications for each treatment. During the baby leaf vegetable harvest, we evaluated the macronutrient levels (nitrogen, phosphorus, and potassium) in the substrate as well as the growth parameters and carotenoid contents. The substrate in the treatment mixed with milkvetch showed significantly higher levels of nitrogen, phosphorus, and potassium compared with those of tatsoi and kale sown alone (P ≤ 0.05). However, there were no significant differences in macronutrients observed in substrate-sown spinach with or without the milkvetch mixture. The growth and carotenoid levels of each baby leafy vegetable sown alone were significantly higher than those of each baby leafy vegetable sown with the mixed seeding treatment (P ≤ 0.05). Sowing the milkvetch–vegetable mixtures did not result in a significant increase in the growth and carotenoid levels of the three baby vegetables. The results showed that planting milkvetch with tatsoi and kale had a significant impact on substrate fertilization. However, regarding short-term vertical indoor farming, the growth and carotenoid responses of the three greens may be different. Nonetheless, we still believe that the combined interactions of legumes can provide long-term benefits by enhancing the biological functionality of the growing medium for balanced indoor agriculture production.

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The Impact of LED Light Spectrum on the Growth, Morphological Traits, and Nutritional Status of ‘Elizium’ Romaine Lettuce Grown in an Indoor Controlled Environment

Cited by 18 publications

References 69 publications

Ultraviolet Radiation Management in Greenhouse to Improve Red Lettuce Quality and Yield

Ultraviolet Radiation Management in Greenhouse to Improve Red Lettuce Quality and Yield

Spectral composition of LED light differentially affects biomass, photosynthesis, nutrient profile, and foliar nitrate accumulation of lettuce grown under various replacement methods of nutrient solution

Effects of the Mixed Seeding Rate of Milkvetch on Fertilizer Substrate, Growth, and Carotenoid Levels of Baby Leaf Vegetables in Vertical Indoor Farming

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