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Three hyacinth cultivars were forced under fluorescent lamps which emitted white, blue, green, yellow and red light. The plants started flowering in the first decade of February. The forcing period for two cultivars, ‘Anna Marie’ and ‘Blue Star’, was shortest under lamps emitting red light. The cultivar ‘White Pearl’ flowered equally early under lamps emitting red, white and blue light. The impact...
Using fluorescent lamps with different colours of light for improvement in vivo propagation of hyacinths by leaf cuttings, was the aim of this experiment. Leaves of three hyacinth cultivars were taken from plants forced in glasshouse, they were rooted in peat in growing room under fluorescent lamps TLD 36W emitting different colours of light: white, blue, green, yellow and red. Light with quantum...
The aim of the research was to investigate seasonal changes of photoperiodic response and inflorescence quality in chrysanthemum from the Time group grown all year round without supplementary lighting. Four chrysanthemum cultivars were grown in 12 cycles starting on the second day of each successive month. The first cycle began on 2 January. From the moment of potting, the plants were treated with...
The pot cultivar of Chrysanthemum x grandiflorum ‘Leticia Time Yellow’ was cultivated and stored in a growth room under fluorescent light of white, blue, green, yellow and red colour. Quantum irradiance was 30 µmol· m-2×s-1. The colour of light exerted a significant influence on the opening of closed inflorescence buds and on post-harvest longevity of pot chrysanthemums grown earlier in an unheated...
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