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The aim of the study was to investigate the effect of the particle size of full-fat rapeseed and of multi-carbohydrase enzyme supplementation on chicken performance. The experiment was conducted with 480 male broiler chickens, divided into four dietary treatments, 15 replications with 8 birds each. Two basal diets were prepared containing fine-ground (FG) or coarse-ground (CG) rapeseed. Diets were...
The aim of the study was to determine the effect of live yeast culture (LYC) and dehydrated yeast culture (YC) containing Saccharomyces cerevisiae on fermentation parameters and degradability in the rumen of sheep fed a high- (H-NDF; 56% DM) or low- (L-NDF; 35% DM) NDF diet. Three Polish Merino sheep fitted with ruminal cannulas were used. The effective degradability of maize grain and wheat straw...
The objective of this study was to investigate the effects of dietary n-6:n-3 polyunsaturated fatty acid (PUFA) ratios on the oxidative stress of the liver in goslings. A total of 160 healthy Yangzhou geese was randomly divided into 4 groups, and each group was fed on diets with different n-6:n-3 PUFA ratios: A (12:1), B (9:1), C (6:1), and D (3:1), respectively. The liver was separated and antioxidant...
This study was conducted to evaluate the effectiveness of adding silicate mineral in feed on tibia bone characteristics and tibia, meat, as well as on faecal ash content in broilers. Four hundred and forty eight one-day-old broiler chicks were reared using a completely randomized design with seven treatments (diets containing 0, 1.5, or 3% of kaolin, bentonite, or zeolite) having four replicates of...
This study was conducted to investigate the effects of n-6:n-3 polyunsaturated fatty acid (PUFA) ratios on serum protein and immunoglobulins in growing geese. One hundred and sixty healthy Yangzhou geese were randomly divided into 4 groups: diets were designed as 12:1, 9:1, 6:1, and 3:1, respectively, by varying dietary n-6:n-3 PUFA ratios. Protein and immunoglobulin levels were measured on d 42,...
To investigate the molecular mechanism by which diets of different energy levels alter fat accumulation, 120 Black-Bone chickens were divided into 3 groups and fed diets with varying energy levels for six weeks (low: 3.02 Mcal/kg, moderate: 3.22 Mcal/kg, high: 3.42 Mcal/kg). The high-energy diet increased the concentration of blood lipids. Furthermore, high-energy intake inhibited the activities of...
Genetic parameters for lactose percentage in the milk of Polish Holstein-Friesian cows were estimated using 48,859 test day records from six lactations of 8,418 cows and the Gibbs sampling method. The multiple-trait random regression model was applied for data from the first and subsequent (up to the sixth) lactations treated as two traits. Variance components and heritabilities changed in a similar...
The aim of the present work was to determine the relative transcript abundance of the oestrogen receptor alpha (ERα) and beta (ERβ) gene in long-term cultures (up to 18 days) of pig granulosa cells (GC) obtained from small (1-2 mm; SF-GC) and large (5-7 mm; LF-GC) follicles. GC were cultured in the presence of 10% foetal calf serum (FCS) and one of the following growth factors: leukaemia inhibitory...
The rhizome of Atractylodes macrocephala Koidz (baizhu in Chinese, AMK) is a well-known traditional Chinese medicine that has long been used as a digestive and tonic. The experiment was conducted to investigate the effect of baizhu powder on the growth performance and immune function of piglets. Duroc × Landrace×Yorkshire piglets (n=72, half males and half females, 42 days of age, liveweight 14.82±0...
This paper reviews the basic knowledge about obtaining farm animal embryos in vitro with special focus on differences among species and application of this procedure in the future. In vitro production of farm animal embryos consists of in vitro maturation (IVM) of oocytes, in vitro fertilization (IVF) of matured oocytes, and in vitro culture (IVC) of embryos. Oocytes can be collected from live animals...
The objective of this study was to predict voluntary intake by cattle of grass silages of different fermentation quality from in vitro gas production data. Further, biological concepts of intake related gas data were examined by cluster analysis to silage chemical composition. Samples from 24 grass silages were characterized from their gas profiles. Observed silage dry matter intake was modelled by...
Two studies were performed to determine the effect of the selection of a diet from different feed ingredients offered on a free-choice basis and to determine the effect of the feeding method on the feeding behaviour and growth performance of calves in the pre-weaning period during different seasons. One-week-old Holstein Friesian calves were assigned to two experimental groups (choice feeding vs single...
The objective of the study was to determine the nutritive value of grain of different maize cultivars for broiler chickens. The study involved 45 Ross 308 broilers (9 groups with 5 chickens per group) aged 42 to 49 days. Chickens were fed the grain of maize cultivars Pioneer PR39H84, Smok, Arobase, Moncada, Pioneer PR39G12, Eurostar, Opoka, Boruta, and Nysa ad libitum. The cultivars of maize differed...
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