搜索结果: 1-9 共查到“特种经济动物饲养学 cows”相关记录9条 . 查询时间(0.061 秒)
Polymorphism and expression of the tumour necrosis factor-alpha (TNF-alpha) gene in non-infected cows and in cows naturally infected with the bovine leukaemia virus
TNF-alpha gene polymorphism gene expression
2016/1/29
The objective of this study was to determine the influence of TNF-alpha gene polymorphism at position –824 A > G on TNF-alpha gene expression in BLV-positive animals with aleukaemic (AL) and persisten...
Analyses of genetic relationships between linear type traits, fat-to-protein ratio, milk production traits, and somatic cell count in first-parity Czech Holstein cows
Holstein cattle genetic parameters milk yield somatic cell score
2015/7/2
Genetic and phenotypic correlations between production traits, selected linear type traits, and somatic cell score were estimated. The results could be useful for breeding programs involving Czech Hol...
Changes in fatty acid profile and iodine content in milk as influenced by the inclusion of extruded rapeseed cake in the diet of dairy cows
extruded rapeseed cake fatty acids
2015/6/8
The aim of the study was to evaluate the effect of extruded rapeseed cake in diets of dairy cows on changes in milk fatty acid profile and iodine content in milk and on the thyroid gland status. An ex...
Effect of rumen-protected methionine, lysine or both on milk production and plasma amino acids of high-yielding dairy cows
amino acids rumen protection dairy cow
2015/6/8
The objective of this study was to determine the effect of supplemental lysine (Lys), methionine (Met) or both amino acids added in the form of rumen-protected (RP) tablets with copolymer coating to a...
A relationship between production and reproduction traits in cows of Czech Pied cattle
milk yield pedigree value Czech Pied cattle
2015/6/5
The purpose of the paper was to analyse the effect of the level of milk yield and breeding value on reproduction of Czech pied cows. In the study of cows that calved in the period 1999–2001 the result...
Effects of rearing, sire and calving season on growth and milk efficiency in dairy cows
dairy cows rearing sire
2015/6/1
32 primiparous cows were used. We tested the hypotheses that live weight and milk efficiency were influenced by the system of rearing from the second week of life to weaning, by the sire, and by the s...
Effects of different forage-containing rations on metabolic parameters and milk yield in the peripartum of Holstein cows
hay silage forage
2015/6/1
To evaluate the forage effects on performance and metabolic parameters, 24 Holsteins were randomly fed one of the diets containing a forage mixture with majority of alfalfa hay (AH), alfalfa silage (A...
The effects of partial replacement of corn silage on biochemical blood parameters in lactating primiparous dairy cows
forage sources corn silage blood cows
2015/4/1
The aim of this experiment was to investigate the effects of partial replacement of corn silage with long alfalfa hay and/or coarse chopped wheat straw on biochemical parameters in late lactating Hols...
THE IMPORTANCE OF MONITORING CHANGES IN MILK FAT TO MILK PROTEIN RATIO IN HOLSTEIN COWS DURING LACTATION
milk fat milk fat to protein ratio quality of rennet gel
2010/12/1
Milk samples of 24 pure-bred Holstein cows were taken during lactation and changes in milk fat to milk protein ratio and quality of rennet gel were evaluated. The cows were either fi rst (n=12) or sec...