Abstract
Two-year field trial was set up on sandy clay soil in the Jiroft and Kahnouj Agricultural Research Center with the objective to determine the effect of plant spacing and different cultivars on the yield and qualitative characteristics of tomato (Lycopersicon esculentum). This experiment was performed as split plot based on complete randomized block design with 3 replications. The main plots were in – row
 spacing in 4 levels include 0.3, 0.4, 0.5 and 0.6 m and the subplots were cultivars naming ‘Shef ’, ‘Peto Early CH’ and ‘FDT 202’. The results showed that, fruit length to diameter ratio, total acidity, fruit number per plant, mean fruit weight, yield per plant, total yield and first harvest to total harvests ratio were significantly affected by plant spacing. In addition, cultivars showed significant effect on all traits evaluated (p
Highlights
Tomato (Lycopersicon esculentum Mill) is one of the most important fruit vegetable over the world and the largest in the cultivation and production among vegetables (FAO, 2008)
Traditional agriculture was based on the use of low yielded varieties and low planting density, but attitudes has moved in modern agriculture towards dense planting and applying varieties with high yield potential
Maximum yield is resulted at optimum plant density which depends upon cropping system and cultivar (Dong et al, 2006)
Summary
Tomato (Lycopersicon esculentum Mill) is one of the most important fruit vegetable over the world and the largest in the cultivation and production among vegetables (FAO, 2008). Plant density per unit area determines the optimal above ground conditions that allows the plant to acquire the essential growth elements (light, CO2, etc.) that influence the productivity of dry matter and the final yield (Ibrahim, 2012). In most regions of Iran, tomato cultivated in spring and summer, in some parts such as Jiroft city according to growth conditions like suitable temperature, tomato production take place as out of season in short tunnels. There is little information on proper cultivar selection and plant spacing for maximum yield and their interaction on qualitative traits and early ripening of tomato. The objective of this case study was to evaluate the effect of plant spacing on qualitative and quantitative characteristic of tomato cultivars in a short tunnel and achieve the optimum plant spacing and suitable cultivar for early ripening in open field condition
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