Izvorni znanstveni članak
The Quality of Fresh Tomato Fruit Produced by Hydroponic
Nadica Dobričević
Sandra Voća
Božidar Benko
Stjepan Pliestić
Sažetak
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.
Ključne riječi
tomato; chemical composition; hydroponic system; cultivars
Hrčak ID:
19404
URI
Datum izdavanja:
15.12.2007.
Posjeta: 1.001 *