Relationship between copper and zinc on selected haematological parameters in beef and dairy cattle
2008
Šrejberová, P., Czech Beef Breeders Association, Praha, (Czech Republic) | Šoch, M., University of South Bohemia in České Budějovice (Czech Republic) | Brouček, J., Slovak Agricultural Research Centre, Nitra (Slovak Republic)
The aim of this study was to evaluate the content of copper (Cu) and zinc (Zn) in blood plasma, faeces and a diet of cattle (cows and heifers) from selected herds and find correlations between these minerals and haemoglobin (Hb), haematocrit (Ht) and leukocytes count (Lc). There was analysing 199 blood and faeces samples of cattle (72 of beef cattle and 127 of dairy cattle) during year 2004. The concentrations of Cu (14.50 ± 3.25 micro mol per l) and Zn (17.99 ± 4.05 micro mol per l) in blood plasma of dairy cattle were higher than in beef cattle (Cu 11.2 ± 3.87 micro mol per l; Zn 13.01 ± 3.86 micro mol per l). The lack of Cu and Zn in beef cattle could be due to deficiency of both elements in a diet that was covered only from 86% by the Cu and 89% by the Zn. There were found linear positive dependencies between Hb, Ht and Cu and Zn (rxy = from 0.201 to 0.335) in dairy cows and (rxy = from 0.520 to 0.688) in beef cattle. The negative significant linear dependency was found between Zn and Lc (rxy = -0.320).
Показать больше [+] Меньше [-]