Horticultural Science, 2019 (vol. 46), issue 1
Aspects influencing the rootstock - scion performance during long term evaluation in pear orchardOriginal Paper
Martin Mészáros, Luděk Laňar, Josef Kosina, Jan Náměstek
Hort. Sci. (Prague), 2019, 46(1):1-8 | DOI: 10.17221/55/2017-HORTSCI 
During 1999-2016, the performance of 'Red Bartlett', 'Conference' and 'Beurré Alexander Lucas' grafted on four pear (Pyrus) rootstocks OH × F 69, OH × F 87, OH × F 230, OH × F 333 and on quince (Cydonia) rootstock BA 29 was evaluated at the RBIP Holovousy Ltd. For each combination, trunk cross-section area, cumulative yield, yield efficiency and mean fruit weight were assessed. The growth vigour of the scion cultivars on OH × F rootstocks was similar or slightly higher comparing to the growth on BA 29. Throughout the years, the growth vigor and productivity of the rootstock combinations may change. Less vigorous combinations of rootstock/scion...
Effect of low temperature in the first development stage for five red raspberry genotypesOriginal Paper
Elida Contreras, Javiera Grez, José A. Alcalde, Davide Neri, Marina Gambardella
Hort. Sci. (Prague), 2019, 46(1):9-16 | DOI: 10.17221/9/2018-HORTSCI
In raspberry, the expression of the primocane fruiting trait is influenced by the environment. Although there are several factors that influence the expression of this character, it is well known that low temperatures that occur during the growth season of the primocane, are important and affect the flowering. In this study, plants in their early stages of development were exposed to low temperatures (2°C) for one month, in a dark cold chamber. The following genotypes primocane and floricane were used: 'UC103', 'Autumn Bliss', 'Heritage', 'Meeker' and 'Tulameen'. Flowering and growth were recorded until the...
Red anthocyanins contents and the relationships with phenylalanine ammonia lyase (PAL) activity, soluble sugar and chlorophyll contents in carmine radish (Raphanus sativus L.)Original Paper
Zhenchao Zhang, Chunqing Sun, Yuemei Yao, Zhongliang Mao, Guosheng Sun, Zhongliang Dai
Hort. Sci. (Prague), 2019, 46(1):17-25 | DOI: 10.17221/202/2017-HORTSCI
Red anthocyanins from Carmine radish is rich both in root flesh and peel and it is relatively simple and efficient to extract these compounds. The accumulation, distribution and content of anthocyanins in root are related to phenylalanine ammonia lyase (PAL) activity, soluble sugar and chlorophyll contents. The results showed that anthocyanins were synthesized at the first day of seed germination and were most abundant in the top of hypocotyls. The content of anthocyanins was higher in the root peel than in flesh and root apex, and in aboveground parts compared with underground sections. The anthocyanins contents in cotyledon grown under light and...
Physiological responses of garden roses to hot and humid conditionsOriginal Paper
Lijuan Xie, Hua Zhang, Deying Li
Hort. Sci. (Prague), 2019, 46(1):26-33 | DOI: 10.17221/200/2017-HORTSCI
Garden roses do not grow well under hot and humid conditions. The objective of this study was to investigate the physiological responses of 'Marie Curie' and 'Lapjau' to high temperatures and relative humidity. The study included temperatures of 25/18°C (day/night) and 35/28°C (day/night), and relative humidity of 70% and 100%. 'Marie Curie' was more tolerant to heat stress than 'Lapjau' based on relative electrolyte leakage (REL), malondialdehyde (MDA), and activities of superoxide dismutase (SOD). The heat tolerance of cultivars also was confirmed by...
Use of solid phase of digestate for production of growing horticultural substratesOriginal Paper
Martin Dubský, Šárka Chaloupková, Lukáš Kaplan, Stanislava Vondráčková, Pavel Tlustoš
Hort. Sci. (Prague), 2019, 46(1):34-42 | DOI: 10.17221/221/2016-HORTSCI
Solid phase of digestate (SD) of agricultural biogas plants, containing undecomposed fibrous fractions of organic matter, is usable as a constituent of growing substrates. The content of soluble salts and available nutrients is limiting for SD addition into growing substrates. For addition of SD with initial 80% moisture its content of ammonium nitrogen and available potassium is limiting. The SD with natural moistness can be used in peat based substrates up to 10%...
Assessing the financial and environmental impacts of precision irrigation in a humid climateOriginal Paper
Daniel El Chami, Jerry W. Knox, André Daccache, Edward Keith Weatherhead
Hort. Sci. (Prague), 2019, 46(1):43-52 | DOI: 10.17221/116/2017-HORTSCI
Precision agriculture is increasingly used where in-field spatial variability exists; however, the benefits of its use in humid climates are less apparent. This paper reports on a cost-benefit assessment of precision irrigation with variable rate technique (VRI) versus conventional irrigation, both compared to rainfed production, using a travelling hose-reel irrigator fitted with a boom on onions in eastern England. Selected environmental outcomes including water savings and CO2e emissions are evaluated. The modelled precision irrigation system, which responds to soil variability, generates better environmental...