Czech Journal of Animal Science, 2021 (vol. 66), issue 9

Adverse effects of cadmium on poultry and role of selenium against it: An updated reviewReview

Mohamed Ketta, Eva Tůmová, Roman Stupka, Jaroslav Čítek, Darina Chodová

Czech J. Anim. Sci., 2021, 66(9):339-348 | DOI: 10.17221/86/2021-CJAS  

Cadmium (Cd) is a toxic heavy metal, discharged into environments naturally or anthropogenically, where industrial and agricultural revolutions have led to serious Cd pollution into the environment. Poultry feed may be contaminated by Cd due to its presence in concentrates and supplements, and also in the machinery and equipment used in feed production and processing. After absorption in the digestive system, Cd largely accumulates in kidneys, liver, bones and other organs and causes irreversible damage to these organs. Higher doses of Cd in the poultry diet reduced feed intake, body weight, bone mineral density, egg production and eggshell quality....

Intake and digestibility in cattle grazing temperate grass associated with legume and/or energetic supplementationOriginal Paper

Cassiano Albino Lorensetti, Magali Floriano da Silveira, Roberta Farenzena, Eduardo Felipe Colerauz de Oliveira Lazzarotto, Jeferson Menezes Lourenço, Andressa Alaine Michailoff, Lucas Felipe Francisco, Ana Carolini Barbosa Sordi

Czech J. Anim. Sci., 2021, 66(9):349-358 | DOI: 10.17221/38/2021-CJAS  

The intercrop between grasses and legumes is an alternative to maintain and increase animal production. The study was conducted to evaluate the effect of grass-legume mixtures with or without supplementations on rumen fermentation, nutrient intake, and microbial protein synthesis. Six Holstein steers fitted with ruminal cannula were kept in a double 3 × 3 Latin square design. The treatments were: 1) oat, annual ryegrass, and supplement (GS), 2) oat, annual ryegrass, and vetch (GL), 3) oat, annual ryegrass, vetch, and supplement (GLS). Supplementation of ground maize was given daily at 11 h at 1% of body weight. Total digestible nutrient intake was...

Combinations of Trolox and ascorbic acid have a beneficial effect on in vitro maturation of pig oocytesOriginal Paper

Ileana Miclea, Marius Zăhan

Czech J. Anim. Sci., 2021, 66(9):359-367 | DOI: 10.17221/253/2020-CJAS  

Abstract: The poor in vitro development of pig oocytes and embryos has been blamed on oxidative stress. We sought to find out if combinations of Trolox (T), a synthetic and cell-permeable derivative of vitamin E, and ascorbic acid (AA) could improve the maturation rates of in vitro cultured pig oocytes. Pig oocytes underwent maturation for 44-45 h in medium M 199 supplemented with 0 μM T + 0 μM AA, 100 μM T + 250 μM AA, 300 μM T + 250 μM AA, 100 μM T + 750 μM AA or 300 μM T + 750 μM AA. These combinations were chosen based on previous research conducted in our laboratory and on the available...

Association of sodium butyrate and phytase on the performance, bone quality and intestinal development in broilersOriginal Paper

Jonas Rodrigo Layter, Regina Buzim, Gustavo Fonseca, Juliana Schulter Schuroff, Lucas Pedro de Souza Glaeser, Jovanir Inês Müller Fernandes

Czech J. Anim. Sci., 2021, 66(9):368-380 | DOI: 10.17221/184/2020-CJAS  

This study assessed the effect of the combination of microencapsulated sodium butyrate (SB) and phytase (PH) on the performance, intestinal integrity, and bone development of broilers. The experiment comprised 736 chicks distributed in a completely randomised design in a 2 × 2 factorial scheme (with and without the inclusion of SB and with the inclusion of PH at the recommended dose and superdosing) totalling four treatments and eight repetitions of 23 birds each. SB was added at 0.750 kg/tonne and PH was included at 750 phytase units (FTU)/kg and 1 500 FTU/kg of diet. The live weight (LW), feed intake (FI) and feed conversion (FC) were evaluated weekly....

Effects of ozonation on water quality and pikeperch (Sander lucioperca) performance in a recirculating aquaculture systemOriginal Paper

Jitka Kolářová, Jiří Křišťan, Oleksandr Malinovskyi, Josef Velíšek, Alžběta Stará, Samad Rahimnejad, Tomáš Policar

Czech J. Anim. Sci., 2021, 66(9):381-390 | DOI: 10.17221/54/2021-CJAS  

The aim of this study was to examine the effects of ozonation on the water quality, and growth, blood biochemistry, antioxidant capacity and survival of pikeperch (Sander lucioperca) reared in a recirculation aquaculture system for 30 weeks. A group without ozone treatment was used as a control. The ozone application led to a significant reduction of the water chemical oxygen demand, biological oxygen demand and unsuspended solids concentration. The results revealed that an ozone treatment as a water treatment method has a positive influence on the intensive culture of pikeperch ensuring a higher survival rate (77%) compared to the non-treated...