Sugar Metabolism and Photosynthesis of Tomatoes Irrigated with Water Treated with Low-Frequency Electromagnetic Resonance Fields in Different Fertigation Doses

Management of irrigation and fertilization in greenhouses, if not done correctly, can cause soil salinization. The use water treated with very low-frequency electromagnetic resonance fields (WVLF) reduce salinization effects on the photosynthetic biometric systems. Thus, purpose research to evaluate metabolism photosynthesis impact WVLF cultivation tomato crops subjected different levels fertigation. For this, gas exchange parameters were evaluated, as well chlorophyll a fluorescence, sugar contents, sucrose, chlorophylls, phaeophytins fruit production. had greater activity when water, consequently production sucrose increased. Photosynthetic System II showed less salinity effect, being favored by fields. increased 20% for dose 2.5 d·Sm−1 reducing caused higher doses. Hence, induction provide damage system crop saline stress and, consequently, favor fruits this under such conditions.