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  • Author: Przemysław Bąbelewski x
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Hanna Szajsner and Przemysław Bąbelewski

Abstract

The aim of this work is to compare the effect of three- and sixfold irradiation with a semiconductor laser beams of 200 mW power and wavelength equal to 670 nm and the rooting agent on the percentage and quality of rooted cuttings of leatherleaf viburnum. The most effective for root number and root length was threefold irradiation and for fresh root weight threefold irradiation applied together with the rooting agent.

Open access

Katarzyna Wróblewska and Przemysław Bąbelewski

Abstract

Portulaca umbraticola Kunth stem cuttings were treated with BA or BA and NAA in different concentrations. BA was applied by spraying or by the quick-dip method. Independent of application type, in almost all of the treatments BA and BA applied with NAA increased the percentage of rooted cuttings, but had no effect on the number of roots, apart from BA in the 0.5 g dm-3 concentration, which doubled the root number. Treatment with BA alone resulted in more intensive axillary shoot development, although only in one concentration (0.2 g dm-3) did BA significantly influence the number and length of lateral shoots. BA applied together with NAA had no effect or inhibited lateral shoot development.

After measurement, rooted cuttings were planted in pots in order to assess subsequent plant growth. Our data indicated that the positive effect of BA on shoot development disappeared during the subsequent cultivation of the plants. BA alone applied by spraying did not influence the number and length of initial and secondary lateral shoots, whereas BA applied with NAA negatively influenced the length of initial lateral shoots as well as the number and length of secondary lateral shoots.

Open access

Regina Dębicz, Anna Pawlikowska, Katarzyna Wróblewska and Przemysław Bąbelewski

Abstract

Silicon supplementation may lead to positive changes in plant quality, including their appearance. The two-factorial experiment with three ornamental plant taxa Gazania rigens ‘Kiss Yellow’, Salvia farinacea ‘Fairy Queen’ and Verbena ‘Obsession Lilac’ was conducted in the years 2012-2013. The first factor was foliar application of Si in form of ortho-silicic acid stabilized with choline (YaraVita Actisil) at the concentrations of 60, 120 and 180 mg·dm-3, while the second was soil application of multinutrient fertilizer (Insol U) at the concentrations of 0.25% and 0.50%. Biometric measurements of plants were carried out at the beginning of flowering. The laboratory analyses included the determination of the content of P, K, Ca, Mg and Si as well as chlorophyll content in the leaves. Silicon had a beneficial influence on a majority of the analysed morphological features. Plants reacted best to high silicon doses (120 and 180 mg·dm-3). Particularly beneficial effects were noted with respect to improved flowering of all analysed plant taxa and to the vegetative development of Salvia and Gazania. Insol U supplementation noticeably improved the flowering of Verbena.