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Master Thesis

Utilisation d'éclairage photosynthétique LED en cultures de tomate hors sol chauffées

Abstract : Tomato (Solanum lycopersicum) is one of the most widely grown and consumed vegetables across the world. This fruit is rich in vitamins and antioxidants and has a high nutritional value. Lighting is a major abiotic factor influencing the crops and the physicochemical qualities of fruits. For optimal production, the quality, intensity, spectrum of light and photoperiod must be adapted according to the needs of plants. Development of LEDs is considered an innovation for producers and especially in low-sunlight production areas where lighting becomes a limiting factor for crops. These lamps have the ability to provide different light spectrum perceived by the photoreceptors of plants. The objective of our study is to determine the influence of artificial lighting with two LED lamp systems on the Climberley variety during a photoperiod of 18h/day. The first system is that of Philips company with red LEDs (660 nm) and blue LEDs (440 nm). The 2nd system is that of Tootem company with white (440 nm and 600 nm mainly) and red (630 nm) light spectrum. Our study revealed that plant development was not affected by supplemental lighting. Firmness, dry matter, sugar content and fruit texture were variable during the season. The fruits lit by the white and red spectrum have the highest sugar levels. Neither of LED systems had significant effect on increasing tomato yield, but the blue and red spectrum has significantly increased the average fruit weight. The susceptibility of plants to supplemental artificial lighting in the south of France is largely influenced by natural lighting.
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Master Thesis
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Diana Nacouzi. Utilisation d'éclairage photosynthétique LED en cultures de tomate hors sol chauffées. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02464353⟩

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