Czech Journal of Animal Science, 2012 (vol. 57), issue 9
Dietary linseed oil and selenate affect the concentration of fatty acids in selected tissues of sheep
M. Czauderna, J. Kowalczyk, M. Marounek
Czech J. Anim. Sci., 2012, 57(9):389-401 | DOI: 10.17221/6313-CJAS 
The aim of the study was to determine the influence of the addition of 5% linseed oil (LO) and 2 µg Se as selenate (SeVI) per g of diet on body mass gain (BMG), feed conversion efficiency (FCE), and concentrations of fatty acids (FA), especially conjugated linoleic acid (CLA) isomers, in the liver, heart, m. longissimus dorsi (MLD), m. biceps femoris (MBF), subcutaneous fat (SF), perirenal fat (PF), and intermuscular fat (IF) of sheep. Each group comprised 5 lambs with an average initial body weight of 25 ± 2 kg. For 35 days the sheep were fed the control or experimental diets enriched with 5% LO, SeVI,...
Genetic parameters including the service sire effect for the sow traits stillbirth and piglet losses in Czech Large White and Landrace
J. Wolf, M. Wolfová
Czech J. Anim. Sci., 2012, 57(9):402-409 | DOI: 10.17221/6314-CJAS
Genetic parameters including the proportion of variance for the service sire effect were estimated for number of piglets stillborn (including piglets died until 24 h after birth) and number of piglets died from 24 h after birth until weaning in Czech Large White (89 231 litters) and Czech Landrace (28 320 litters) pigs. Both traits were considered to be traits of the sow. Two two-trait animal models were evaluated for each breed including or excluding the service sire effect. Estimates of genetic parameters were very similar for the two models. The heritability for number of stillborn piglets was 0.06 in both breeds and both models and the heritability...
Effects of a rumen-protected form of methionine and a methionine analogue on the lactation performance of dairy cows
J. Čermáková, V. Kudrna, J. Illek, K. Blažková, J. Haman
Czech J. Anim. Sci., 2012, 57(9):410-419 | DOI: 10.17221/6315-CJAS
The objective the present study was to determine the influence of a supplemental methionine analogue, the isopropyl ester of 2-hydroxy-4-(methylthio)-butanoic acid, commercially available as MetaSmartTM, on lactation performance, particularly milk protein production. The effects of this preparation were compared with those of a rumen-protected form of methionine, marketed as SmartamineTM M. Experiments were conducted according to a 3 × 3 Latin square design and included 30 high-yielding dairy cows (22 Holstein and 8 Czech Fleckvieh) randomly allocated to three balanced groups. Cows were fed a basal diet based on maize silage,...
Effect of herbal extracts on piglet performance and small intestinal epithelial villi
E. Hanczakowska, M. Swiatkiewicz
Czech J. Anim. Sci., 2012, 57(9):420-429 | DOI: 10.17221/6316-CJAS
The effect of a mixture of herbal extracts on piglet performance was estimated on 178 piglets allocated to 3 groups comprising 6 litters each. Group I (control) was fed with the standard barley-wheat-soybean mixture. Group II received the same mixture supplemented with a blend of formic and propionic acids. Group III received the basal diet supplemented with a mixture of water extracts from sage, lemon balm, nettle and coneflower (20, 30, 30, and 20%, respectively) at 500 mg/kg feed. The experiment lasted for 84 days but on day 56 six piglets from each group were slaughtered and their gastrointestinal tract was removed. Apparent digestibility was estimated...
Effect of the diet amended with risk elements contaminated soil on risk elements content in tissues and hematological parameters of rats
J. Száková, Z. Novosadová, V. Zídek, A. Fučíková, J. Zídková, D. Miholová, P. Tlustoš
Czech J. Anim. Sci., 2012, 57(9):430-441 | DOI: 10.17221/6317-CJAS
Penetration of rat organisms by risk elements (As, Cd, Pb) originated from differently contaminated soils as well as interactions between the risk elements and selected essential macro- and microelements were investigated. Rat diet contained 10% of individual soils (based on dry weight) which were: (i) Fluvisol heavily polluted by As, Cd, Zn, and Pb, (ii) Luvisol contaminated by As, Cd, and Zn, and (iii) uncontaminated Chernozem. Male Wistar rats used for the experiment were housed in cages in a room with controlled temperature for 60 days and fed ad libitum on the mentioned diet. The levels of both risk and essential elements were measured...