Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2023 (vol. 71), issue 3
Interannual Effect of Digestate Fertilization on Yields and Quality of Winter Rye Forage
Jan Pazdera, Ladislav Varga, Ladislav Ducsay
Acta Univ. Agric. Silvic. Mendelianae Brun. 2023, 71(3), 131-140 | DOI: 10.11118/actaun.2023.009 
In two-year pilot field experiments (harvest 2021-2022) we explored the interannual effect of digestate fertilization (30 t/ha prior to sowing) on yields and some qualitative parameters of winter rye (KWS Progas) forage silage. The yields of the aboveground biomass differed insignificantly on a year to year basis: 31.07 t/ha FM in 2021 and 25.17 t/ha FM in 2022 (4.9 t/ha DM in 2021 and 4.2 t/ ha DM in 2022) although the dry matter content differed significantly: 15.6% in 2021 and 16.6% in 2022. Interannual differences in the qualitative parameters were significant for these characteristics (% of DM) - Ntot.: 2.2% (2021) versus 1.9% (2022);...
Erosion and the Economic Evaluation of the Conservation Grassland as an Existing Effective Tool to Reduce Erosion
Ivo Horák, Petr Marada
Acta Univ. Agric. Silvic. Mendelianae Brun. 2023, 71(3), 141-153 | DOI: 10.11118/actaun.2023.010
Problem with soil erosion has not yet been satisfactorily solved with a holistic approach through a precisely targeted and duly explained strategic plan in the Czech Republic. Even though there are effective means to undertake needed measures, conservation grassland being one of them. The research aims to contribute to the debate that concerns battling soil erosion in Czech conditions. The idea of conservation grassland as an effective tool to battle soil erosion is well-known by the experts and farmers alike. Although there has been a discussion on what should be the extent of conservation grassland on a country-level in Czech conditions, there still...
Harmful Lepidoptera in Czechia - current status, changes and importance
Hana Šefrová, Zdeněk Laštůvka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2023, 71(3), 155-162 | DOI: 10.11118/actaun.2023.011
An analysis of the current harmfulness of moths and butterflies (Lepidoptera) in Czechia was carried out. In total, about 50 species (1.4% of the Czech fauna) of regular or at least occasional pests with a not insignificant economic importance are registered. Of these, 16 (30%) damage field and garden crops, 15 (28%) fruit trees and grapevine, 7 (13%) ornamental greenery, 6 (12%) forest trees and 9 (17%) stored materials. The causes of possible changes in species composition and pest abundance are briefly discussed. The species spectrum of pests has clearly narrowed over the last decades. The loss of harmfulness has usually occurred in less significant,...
Fish community of A HEAVILY MODIFIED URBAN STREtCH OF THE River Svratka: fish rescue TRANSFER prior to THE INITIATION OF flood protection CONSTRUCTIONS
Zdenka Jurajdová, Jan Grmela, Luděk Šlapanský, Michal Hnilička, Michal Janáč, Zdeněk Adámek, Maria Tkachenko, Pavel Jurajda
Acta Univ. Agric. Silvic. Mendelianae Brun. 2023, 71(3), 163-169 | DOI: 10.11118/actaun.2023.012
Here, we present the results of a large-scale fish rescue prior to the building of flood protection structures along a stretch of the River Svratka running through Brno city centre (Moravia, Czech Republic). During this demanding and unique event, 5,861 fish, with a total weight of 1,951 kg, were caught and successfully transferred downstream. A total of 21 species of fish were recorded, of which two were protected species and two non-native to the Czech Republic. The dominant species caught (i.e. > 10%) were chub (Squalius cephalus), nase (Chondrostoma nasus), roach (Rutilus rutilus) and vimba bream (Vimba vimba), making up 85% of the catch. While...