ISHS Acta Horticulturae 133: Nutrient Film Technique and Substrates, XXI IHC
COMPOSTED BARK - GROWING SUBSTRATE IN VEGETABLE FORCING |
| Authors: | F. Vlcek, I. Polách |
| Abstract:
Trials with composted conifer bark as growing substrate for forced vegetable were carried out in Research Institute of Vegetable Growing and Breeding at Olomouc. Bark crushing and N amendement positively influenced the course of compost preparation. Complete range of added nutrients decreased cellulose content during composting period but higher salt concentration influenced negatively the first grown cultures. Fermentative preparation (eokomit) had positive effect on the rise of temperature in compost piles. During the bark composting process the water capacity and compost volume weight increased. The reaction (pH) was transposed to mere favourable zone and the concentration of soluble salts decreased. Humin components were somewhat higher, cellulose content decreased. Bark composts alone can be applied as growing substrates of cucumbers, tomatoes, sweet pepper and head lettuce. In cucumber growing best results were gained in bark with addition of 1.500 g N and 1/10 vol. of manure before composting. Bark composts can be to a great extent substituted for peat. The addition of bark substrate to forcing soil (0.2 m3 of bark on 1 m2 also proved to be good. | |
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