ISHS Acta Horticulturae 691: International Conference on Sustainable Greenhouse Systems - Greensys2004
THE EFFECT OF NITROGEN FERTILIZATION ON THE QUALITY OF THREE TOMATO TYPES CULTIVATED ON ROCKWOOL |
| Authors: | J. Kobryn, E. Hallmann |
| Keywords: | Tomato type, fruit quality, rockwool, nitrogen fertilization |
| Abstract:
Three types of tomato were cultivated on rockwool using the following levels of nitrogen in the nutrient solution:140, 210 mg N in 1 dm3 for the entire vegetation period or 140 mg until 3 cluster were set and then 210 mg. At the pick of fruiting samples of fruits were collected from all the analyzed combinations for chemical, physical and sensory analyses. The obtain results show that the fruit of cherry tomato contained the largest amounts of dry matter, total sugars, acids, vit. C, free aminoacids, beta-carotene and flavonoids. They also obtained the highest grades in the sensory evaluation of the typical taste and tomato flavour. The cluster type had the largest amounts of lycopene, its fruits were hardest and had the most intensive colour as compared to cherry and large-fruit tomato. Nitrogen fertilization modified the content of the determined components in various ways, depending on the tomato type. | |
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