Czech Journal of Animal Science, 2010 (vol. 55), issue 3
Genetic relationship between milk dry matter and other milk traits in extended lactations of Polish Holstein cows
K. Yazgan, J. Makulska, A. Węglarz, E. Ptak, M. Gierdziewicz
Czech J. Anim. Sci., 2010, 55(3):91-104 | DOI: 10.17221/49/2009-CJAS 
The objective of this research was to examine heritabilities and genetic, phenotypic and permanent environmental relationships between milk dry matter (DM) and milk traits such as milk, fat, protein and lactose yields, milk urea nitrogen (MUN) and somatic cell score (SCS) in extended (to 395 days) lactations of Holstein cows from a big farm in Poland. The data set consisted of 78 059 test day records from the first, second and third lactations of 3 792 cows, daughters of 210 sires and 1 677 dams. Single- or two-trait random regression models were used with fixed effects of calving year, calving month, dry period and calving interval and random additive...
Influence of inoculated maize silage and sunflower oil on the in vitro fermentation, ciliate population and fatty acid outputs in the rumen fluid collected from sheep
Z. Váradyová, S. Kišidayová, A. Lauková, D. Jalč
Czech J. Anim. Sci., 2010, 55(3):105-115 | DOI: 10.17221/145/2009-CJAS
The effect of maize silage (MS) supplemented with sunflower oil (SO) on the rumen fermentation parameters, growth of ciliate population and fatty acid outputs was investigated for 72 hours using a batch culture fermentation technique. The rumen fluid from ruminally fistulated sheep was mixed with McDougall's buffer (1:1) and added (35 ml) to fermentation bottles containing 1.5 g (0.38 g of DM) of MS with or without SO (30 g/kg of DM). Four types of MS were used: uninoculated (MS) or inoculated with Lactobacillus plantarum CCM 4000 (MS+LP), Lactobacillus fermentum LF2 (MS+LF) or Enterococcus faecium CCM 4231 (MS+EF) in simultaneous...
Effects of dietary dihydropyridine supplementation on growth performance and lipid metabolism of broiler chickens
Z.Y. Niu, F.Z. Liu, Y.N. Min, W.C. Li
Czech J. Anim. Sci., 2010, 55(3):116-122 | DOI: 10.17221/109/2009-CJAS
An experiment was conducted to investigate the effects of dihydropyridine supplementation on growth performance and lipid metabolism of broilers. A total of 480 one-day-old female Arbor Acres broiler chicks were randomly divided into four groups, each group had six replications of 20 birds. Each group was fed a maize-soybean meal diet supplemented with 0, 100, 200, 300 mg/kg dihydropyridine, respectively, for six weeks. At 42 days of age, body weight and feed intake were not affected by dihydropyridine, while feed efficiency was significantly increased by 8.4%, 15.0% and 12.0%, respectively (P < 0.05). The percentage of abdominal fat and...
Longitudinal patterns in fish and macrozoobenthos assemblages reflect degradation of water quality and physical habitat in the Bílina river basin
P. Jurajda, Z. Adámek, M. Janáč, Z. Valová
Czech J. Anim. Sci., 2010, 55(3):123-136 | DOI: 10.17221/14/2009-CJAS
The aim of this study was to provide the first account of fish and macroinvertebrate communities in a heavily degraded river basin in the Czech Republic. Fish and macrozoobenthos were surveyed at 18 sites in the Bílina River and 11 sites in tributary streams during June-July 2007. Fish were sampled by electrofishing and macrozoobenthos were collected by kick-sampling using a sweep net. The composition of macroinvertebrate assemblages in headwater and reference sites in the upper Bílina River indicated clean water with saprobic index (SI) 1.31-1.43 followed by a transitional stretch downstream the Kyjická reservoir (SI 2.05-2.32) and dramatic decline...