Czech Journal of Animal Science, 2022 (vol. 67), issue 2
Cow metabolic status assessed from fat/protein ratio in milk affected ovarian response and number of transferable embryos after superovulationOriginal Paper
Luděk Stádník, Jaromír Ducháček, Jan Pytlík, Matúš Gašparík, Radim Codl, Marek Vrhel
Czech J. Anim. Sci., 2022, 67(2):39-46 | DOI: 10.17221/187/2021-CJAS 
This work aimed to evaluate the quantity and the quality of flushed embryos based on the metabolic status of dairy cows, lactation number, and size of the ovaries. Fifty-nine Holstein cows on 1st to 5th lactation were enrolled in the experiment. Monitoring took place during the period from October to November and from March to June. Cows with corpus luteum were included for the hormonal treatment - superovulation and timed insemination. The cow was inseminated, resp. re-inseminated, during the induced heat with insemination doses from one bull from the same batch. Embryo flushing was performed on the 7th day after the...
A comparative study on the effect of quantitative feed restriction in males and females of broiler chickens, rabbits and nutrias. I. Performance and carcass compositionOriginal Paper
Eva Tůmová, Darina Chodová, Zdeněk Volek, Tarek A. Ebeid, Mohamed Ketta, Věra Skřivanová
Czech J. Anim. Sci., 2022, 67(2):47-54 | DOI: 10.17221/185/2021-CJAS
The aim of the study was to compare the effects of feed restriction on the growth performance and carcass composition of chicken, rabbit and nutria males and females. Feed restriction was applied at a rate of 70% ad libitum from 14 to 21 days of age in chickens, 70% ad libitum from 42 to 49 days of age in rabbits, and 70% ad libitum from 12 to 15 weeks of age in nutrias. Animals were fed ad libitum prior to and following restriction. Carcass composition was evaluated at common slaughter ages, i.e., 31 days in chickens, 70 days in rabbits, and eight months in nutrias. The results showed stronger effects of feed restriction,...
A comparative study on the effect of quantitative feed restriction in males and females of broiler chickens, rabbits and nutrias. II. Meat qualityOriginal Paper
Eva Tůmová, Darina Chodová, Zdeněk Volek, Tarek A. Ebeid, Mohamed Ketta, Věra Skřivanová
Czech J. Anim. Sci., 2022, 67(2):55-64 | DOI: 10.17221/186/2021-CJAS
The objective of the study was to evaluate the effects of feed restriction and sex on the physical, chemical and histochemical parameters of meat quality in chickens, rabbits and nutrias. Feed restriction was applied at a rate of 70% ad libitum from 14 to 21 days of age in chickens, 70% ad libitum from 42 to 49 days of age in rabbits, and 70% ad libitum from 12 to 15 weeks of age in nutrias. Animals were fed ad libitum prior to and following restriction. The results showed stronger effects of feed restriction, sex, and their interaction on the meat quality of broiler chickens than in rabbits and nutrias. The effect...
Effects of bacitracin zinc, potassium diformate and lauric acid on duodenal digestive functions, intestinal morphology and caecal microflora of broilersOriginal Paper
Ying Lin, Shi-Zhong Hu, Yang Sun, Ling Jin, Chang-Kang Wang, Yu-Yun Gao
Czech J. Anim. Sci., 2022, 67(2):65-74 | DOI: 10.17221/123/2021-CJAS
This study investigated the effects of bacitracin zinc, potassium diformate and lauric acid on duodenal digestive functions, intestinal morphology and caecal microflora of broilers. A total of 240 male broilers were randomly allotted to four treatments consisting of five replicates with 12 birds per replicate. The dietary treatments were CON group (basal diet), ANT group (basal diet + 40 mg/kg bacitracin zinc), KDF group (basal diet + 1 000 mg/kg potassium diformate), and LA group (basal diet + 500 mg/kg lauric acid). The results showed that the chymotrypsin activity was significantly enhanced on days 21 and 42 in KDF group compared with CON group...