بررسي تاثير مديريت هاي متفاوت كشت گلخانه اي توت فرنگي Fagaria ananassa بر عملكرد كيفيت محصول

Effects of Different Strawberry(Fagarian x ananassa) Production Managements in Greenhouse Conditions on Yield and Fruit Quality

Strawberry production in controlled conditions is increasing dramatically. Therefore, it is necessary to employ new methods to improve its production management. To do so, this study was conducted during 2005-2006 in a split split plot in randomized block design with three replications. In this experiment, effects of such factors as plant density, electrical conductivity of nutrient solutions, frequency of irrigation and type of cultivar were studied on yield and quality of two strawberry cultivars i. e. Selva and Camarosa. Experiment was carried out in a greenhouse located in the Department of Horticulture, Faculty of Agriculture, University of Tehran, Karaj- Iran . Plants were cultivated in a medium consisted of perlite and peat moss inside plastic pots of 22cm. in diameter. Plant densities were 13.8 and 20 plants /m2 which were irrigated six of eight times/day with nutrient solutions of different EC of 1.5 and 2.5 ds/m2. Results showed that increasing plant density from 13.8 to 20 plants/m2 increased yield/m2 and vitamin C but reduced yield/plant. EC of 2.5ds/m2 reduced yield/plant, yield/m2, mean weight and diameter of fruit as well as total soluble solids. Camarosa had a higher yield/mʹ, yield/ plant, length and weight of fruit, total soluble solid as well as vitamin C. However, it contained less acid as compared to Selva.