Background: Nutritional solution is one of the most important factors determining the Yeild and quality of the product among the factors affecting hydroponic production systems. Different nutrient solutions are used in different countries depending on the type of cultivation, environmental factors and the costs of different fertilizers. In Iran, the effect of different nutrient solutions on plant cultivation has been less studied due to the short history of non-soil cultivation systems. Therefore, in order to achieve proper performance and quality, important nutrient solutions should be examined so that the most suitable ones can be selected economically, impact on performance and even environmental factors.
Aim: Since each of the recommended nutrient solutions in non-soil crops should be recommended according to the type of crop and climatic conditions of that region, and this is one of the poles in Bushehr province, especially Dashti city. Tomato cultivars in the province have not been realized so far, so the present study was conducted to find the best nutrient solution composition according to the climatic conditions of the region on tomatoes, which are among the commercial products of the province and the region.
Methodology: This experiment is a randomized complete block design with 10 treatments including specific nutrient solutions for tomato growing (Hewitt, 1966; Jones, 1982; Hogland and Arnon, 1950; Steiner, 1984; Cooper, 1979; Savvas, 2012; Research Centre Soilless; Hochmuth and Hochmuth, 1990; Mattson and Peters, 2014; Jensen and Malter, 1995) under three replication conditions in a commercial greenhouse in Dashti County. Each replication included 4 tomato plants. At the end of the experiment and in the fruiting stage, the desired traits including EC and pH of the effluent of the culture medium, fresh and dry weight of shoots, plant height, internode length, leaf area, number of spikes, number of flowers per spike, number of fruits per Cluster, fruit we