Horticultural Science, 2009 (vol. 36), issue 1
The occurrence and morphological characteristics of the wild pear lower taxa in Slovakia
V. Paganová
Hort. Sci. (Prague), 2009, 36(1):1-13 | DOI: 10.17221/5/2008-HORTSCI 
The occurrence of 10 lower taxa within species Pyrus pyraster L. (Burgsd.) was confirmed in Slovakia. Among 507 of the evaluated plants on 64 localities, there were recorded 2 sub-species of the wild pear - Pyrus pyraster subsp. pyraster and Pyrus pyraster subsp. achras . Subspecies pyraster was represented by 4 varieties (pyraster, elongata, pénzesiana, brachypoda ) and 5 forms (populifolia, cordifolia, rhomboidea, ovata, slovenica ). All lower taxa were visually classified according to the leaf and fruit characteristics. Numerical classification based on discriminant analysis according...
Effect of irrigation on intensity of respiration and study of sugar and organic acids content in different development stages of Lonicera kamtschatica and Lonicera edulis berries
T. Juríková, J. Matuškovič, Z. Gazdík
Hort. Sci. (Prague), 2009, 36(1):14-20 | DOI: 10.17221/45/2008-HORTSCI
This article investigates the effect of irrigation on the intensity of respiration of Lonicera kamtschatica and Lonicera edulis during different stages of fruit development in the conditions of Nitra in 2002 and 2003. Changes in organic acids and sugar content during fruit ripening process were also monitored within non-irrigated variant of Lonicera kamtschatica and Lonicera edulis in 2002. The intensity of respiration can be divided into 4 stages corresponding with intensive cell division of fruit (stage I), enlargement of fruit pericarp and fruit colouring (stage II) and fruit softening (stage III). In the early stages...
Impact of organic fertilizers on total antioxidant capacity in head cabbage
P. Bímová, R. Pokluda
Hort. Sci. (Prague), 2009, 36(1):21-25 | DOI: 10.17221/9/2008-HORTSCI
In recent years, the agri-food sector and consumers have begun to look at food not only for basic nutrition, but also for health benefits. The purpose of this study was to investigate the variations in the total antioxidant capacity (TAC) in head cabbage according to the used type of fertilizer. Commercial brands of alternative, organic fertilizers were compared with conventional, mineral fertilizers in culture of head cabbage. There were seven different treatments: Agormin, Agro, farmyard manure, horticultural compost, Dvorecký agroferm, mineral fertilizer, and an unfertilized control. All the treatments assured approximately the same level of nutrients....
Studies on antioxidant constituents of some domesticated capsicums in the middle hill conditions of western Himalayas
V. Pandey, H. K. Pandey, D. Dayal, U. C. Joshi, T. Pant, Z. Ahmed
Hort. Sci. (Prague), 2009, 36(1):26-30 | DOI: 10.17221/18/2008-HORTSCI
The objective of this study was to determine some cultivars suitable for their antioxidant constituents, which can further be used in breeding programmes to breed superior varieties and F1 for higher quality attributes. Thirty cultivars of domesticated capsicums were grown and analyzed during 2006-2007; they showed significant variation in their ascorbic acid and capsaicinoids contents. On the basis of ascorbic acid, the rank order of cultivars was PBC-926 > Chilli Long Black > HC-201 > KT OV > Local D-2. On the basis of capsaicinoids content, five top cultivars were selected, namely DARL-210 > Naga Jalokia > Red Sabina > CO-6-1...
Polyploidization of Pelargonium × hortorum L. H. Bailey in greenhouse conditions
P. Jadrná, F. Kobza, O. Plavcová
Hort. Sci. (Prague), 2009, 36(1):31-37 | DOI: 10.17221/29/2008-HORTSCI
This study is aimed at induction of polyploidy in the black-leaved cultivar Pelargonium × hortorum L. H. Bailey Black Velvet Scarlet F1 to obtain basic breeding material for creating new black-leaved tetraploid cultivars. The cultivar Gizela F1 was chosen as a control for the experiment. Tetraploidy was induced in seedlings in the cotyledon stage using various concentrations (from 0.1 to 2.5%) of colchicine water solutions; the treatments were repeated daily for 2, 3, 5 or 7 successive days. The first experiment, done in 2005, was very successful; 17.4% of treated Black Velvet Scarlet F1 plants and 23.7% of treated Gizela F1 plants...
The effect of rockwool on physical properties of growing substrates for perennials 38
M. Dubský, F. Šrámek
Hort. Sci. (Prague), 2009, 36(1):38-43 | DOI: 10.17221/22/2008-HORTSCI
The possibility of peat replacement with crushed water absorbent rockwool in growing substrates in the amount of 35% vol. was verified in the experiment with perennials in containers. Three types of substrates, i.e. peat, and two mixtures of peat with alternative components - green waste compost (25% vol.) or composted spruce bark (40% vol.) were compared. A sand box in the range of -0.5 to -10 kPa was used to determine retention curves and other physical properties of the components and substrates. The addition of rockwool to the peat substrate increased content of air and easy available water, the plant growth was not affected. Plants grown in substrates...