the relationship between some blood elements and metabolites with repeat breeding in dairy cows at azarnegin dairy farm
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the relationship between milk urea and some blood metabolites with pregnancy of holstein dairy cows
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متن کاملTreatment of Repeat Breeding in Dairy Cows with Lugol’s Iodine
This study was carried out to see whether the uteri of dairy cows suffering from repeat breeder syndrome are infected with bacteria or not. Furthermore, the efficacy of intra-uterine infusion of diluted Lugol’s iodine to treat this syndrome was tested by studying two reproductive traits, the rate of service per conception and the length of the days open (DO). Sixty cross-bred dairy cows that we...
متن کاملConcentrations of Some Elements in Dairy Cows with Reproductive Disorders
Serum Ca, P, Mg, Zn, and Cu concentrations in cows affected with reproductive disorders were determined. A possible relation between serum concentrations of these elements and reproductive diseases was evaluated. In total, 109 Holstein cows ageing between 3 and 9 years were investigated. Thirty-six cows showed postpartum anoestrous, fifty-six were repeat breeders, and seventeen cows served as c...
متن کاملRelationship between milk yield, stage of lactation, and some blood serum metabolic parameters of dairy cows
The aim of the study was to evaluate the effect of milk yield and stage of lactation on the activity of liver enzymes, cholesterol, and vitamin C concentration in blood of milking cows. The experiment was carried out on Polish Holstein-Friesian Black and White dairy cows with two different milk yield levels: M – medium (about 7000 kg per lactation) and H – high (about 10 000 kg per lactation). ...
متن کاملThe Relationships Between Milk Production and Some Blood Metabolites and Their Effects on Returning to Estrus in Lactating Holstein Dairy Cows
In this study, the relationships and correlations between milk production and some blood metabolites related to energy and protein balance and their effects were investigated on returning to estrus after AI in lactating Holstein dairy cows. Blood and milk samples were collected from sixty lactating Holstein dairy cows based on their reproductive status in 13-17 d post AI. BUN, MUN, glucose, tri...
متن کاملRanking Dairy Cows for Optimal Breeding Decisions
This paper discusses when to start and stop breeding cows in their lactation. First, a review of the literature on the optimal voluntary waiting period (when to start breeding cows) shows that there is not much consensus on how long the economically optimal voluntary waiting period is. Secondly, the paper then describes a computer program that calculates the insemination value (IN$) for cows in...
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عنوان ژورنال:
پژوهش های علوم دامیجلد ۲۳، شماره ۳، صفحات ۱۰۱-۱۱۲
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