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Strawberry (Fragaria × ananassa Duch) is one of the most important horticultural crops in Iran and in the world. Strawberries because of the high potential of fruit production and quality, rich minerals, vitamins, ellagic acid, anthocyanins, flavonols, flavonoids, some essential amino acids and anticancer activity has economic and nutritional importance. In order to investigate the effect of electrical conductivity (EC) and three different culture media on vegetative and physiological traits, yield and fruit quality in strawberry cv. Camarosa, a factorial experiment was conducted based on completely randomized design with 9 treatments and 3 replications in greenhouse of horticultural department, faculty of agricultural, university of Kurdistan. Treatments included cocopeat-perlite, cocopeat-vermiculite and cocopeat-zeolite in a ratio of 50/50. Nutritional solutions with three electrical conductivity (0.8, 1.7 and 4 dS / m) was used to feed the plants. In this experiment, number and leaf area, root length and volume, crown number, dry weight of shoot and root, total dry matter, leaf necrosis area, chlorophyll a, b and total, relative leaf water content, cell membrane stability index, proline, total soluble carbohydrates, lipid peroxidation, hydrogen peroxide, total soluble proteins, peroxidase and superoxide dismutase activity, concentration of some elements, yield and some fruit characteristics were measured. The results showed that with increasing of nutrient solution EC, growth indices (leaf area, root length and volume, dry matter of root and shoot, total dry matter), leaf relative water content, cell membrane stability index, yield and number of fruits decreased, While increasing of nutrient solution electrical conductivity has led to an increase in the percentage of leaf necrosis area, proline content, soluble carbohydrates, malondialdehyde, H2O2, peroxidase and superoxide dismutase activity, elements content (except iron) in leaf, total soluble solids, vitamin C, pH, anthocyanin, antioxidant capacity, phenol and flavonoids in fruit. In general, cultivation of plants in the coccopeat-vermiculite culture media compared with other culture media improved vegetative properties. The lowest percentage of leaf necrosis area in cocopeat-zeolite culture media and the highest salinity tolerance index in perlite-cocopeat culture media was obtained. The yield of marketable fruits decreased significantly with increasing the nutrient solution EC from 0.8 to 4 ds / m. On the other hand, the marketable yield was significantly higher in cocopeat-perlite culture media than cocopeat-zeolite culture media. In addition, the highest fruit number and yield was obtained in the cocopeat-vermiculite culture media and 1.7 dS / m. Also, the amount of calcium and total soluble solids were highest in cocopeat-zeolite culture media.
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