Agriculturae Conspectus Scientificus, Vol 72, No 4 (2007)

The Quality of Fresh Tomato Fruit Produced by Hydroponic

Nadica DOBRIČEVIĆ, Sandra VOĆA, Božidar BENKO, Stjepan PLIESTIĆ

Pages: 351-355


The quality of fresh tomatoes (Lycopersicon esculentum Mill.) planted in rockwool in hydroponic system is defined by their internal parameters: contents of dry matter and soluble dry matter (°Bx), total acidity (% citric acid), pH, % NaCl and L-ascorbic acid. Research was carried out during 2003 and included 21 cultivars. Tomato plants were planted into rockwool slabs 100 cm x 15 cm x 7.5 cm. Three plants were planted 33 cm apart in 11.25 L of substrate. The trial was laid out according to the randomized complete block design with four replications, and sampling was carried out during three harvests in: June, July and August. The dry matter content was 4.29% (cultivar ΄Syta΄) to 6.21% (cultivar ΄Delfine΄), and content of soluble dry matter was 3.0% (cultivar ΄Brooklyn΄) to 4.5% (΄Lustro΄ and ΄72-503΄). Total acidity amounted from 0.19% (cultivar ΄Syta΄) to 0.45% (cultivar ΄Lustro΄), and pH values ranged from 4.20 (cultivar ΄20377΄) to 4.68 (cultivar ΄Syta΄). Salt content ranged from 0.08% (΄Campeon΄ and ΄F 18402΄) to 0.13% (΄Brooklyn΄ and ΄E 27.31299΄), and L-ascorbic acid content ranged from 260.40 (cultivar ΄Antinea΄) to 458.30 mg/dry matter (cultivar ΄F 18402΄). By studying the basic chemical composition of selected cultivars, significant differences in their soluble dry matter and pH were revealed but only at the first sampling.


tomato; chemical composition; hydroponic system; cultivar

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