Nutritional response of seedling tomato plants under different lighting treatments |
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| Authors: | Eva María Almansa Antonio Espín Rosa María Chica |
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| Institution: | 1. Agronomy Department, Higher Polytechnic School and Experimental Science College, University of Almeria, Almería, Spain;2. Higher Technical School of Civil Engineering, University of Granada, Campus Universitario de Fuentenueva, Granada, Spain;3. Engineering Department, Higher Polytechnic School and Experimental Science College, University of Almeria, Almería, Spain |
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| Abstract: | In order to describe the effect of complementary artificial light supply on the nutrient status of tomato seedlings, fluorescent lamps were compared to each other. Nitrogen (N), phosphorus (P), and potassium (K) concentrations were measured (mg g?1 dry matter). Blue, red and far-red relationships were established. The N, P and K higher concentration and uptake have been found under high efficiency fluorescent lamps. Phosphorus uptake increasing was observed at high levels of irradiation. Potassium concentration is significantly higher under compact fluorescent lamps. The relationship between ratios and N, P and K extractions were used as indicators of limitation for plant. The ratio N/P and N/K present a low relation with N extraction. The ratio N/P presents a significant correlation with P extraction, also the ratios N/K and P/K with K extraction. Significant differences in constant of lineal equation have been found in P/K ratio and K extraction. |
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| Keywords: | Fluorescent lamps nitrogen phosphorus potassium photosynthetically active radiation |
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