EN
In greenhouse cultivation the influence of two organic and two mineral substrates on growth of cucumber cv. Pacto F1 were studied. Organic substrates, i.e. coconut fiber, straw, and rockwool were used as growing slabs (pressed), while perlite in plastic sacks (loose). New training system was applied in which the cucumber plants were lowered once a week , before they reach maximum height at the top of support construction. The old leaves from the bottom part of pla nts were removed. The control training method was traditional pruning to the single stem which grow s to overhead wire and then down again. It was noticed that the early and marketable yield of glasshouse cucumber cv. Pacto F 1 was not affected by the substr ates used in the experiment. New training system created better climate conditions for cucumber growth. The plants stayed healthier to the end of harvest than in control cultivation. But it was not related to better yielding. With the two exception the yie ld of cucumber was the same regardless of training method. The yield of cucumber was the same regardless of training method. The only exception were the early yield in 2010 and marketable yield in 2011 signif- icantly reduced in new training system, probably because of wrong pruning. New training system is recommended for the greenhouses and plastic tunes with insufficient ventilation system, specially during the time of cloudy weather