robotic milking systems (rMS) offer an innovative approach to improve productivity on dairy farms. rMS will influence the future growth of farms, the nature of husbandry employed and the quality of life on family farms. For farms using hired labour and located near industrial centres, RMS may contribute to the reduction of wage costs. As this technology is very expensive, and little is known re...

twelve (experiment i) and four (experiment ii) multiparous dairy cows seronegative to pestivirus were selected and randomly assigned to either a control group which did not become infected or a treatment group in which all cows became infected following intranasal inoculation 9 days before ai. the experimental induction of infection was carried out with 2 ml of non-cytopathic pestivirus (bvd vi...

licensed dairy farms in the central region of fars province were randomly selected in order to participate in aseasonal prevalence study. a cross-sectional study was designed to determine prevalence at cow and quarterlevel based on clinical signs for clinical mastitis and indirect tests for subclinical mastitis. 6180 quarters from1545 dairy cows were tested by clinical examination and californi...

A University of Wisconsin-Madison lameness survey was carried out on 30 well recorded dairy herds – 15 stanchion/tie-stall and 15 free-stall, with a variety of stall bases. Each herd was visited twice – once in the spring/summer of 2000 and once in the winter of 2001. On both occasions, all milking cows were locomotion scored 1 through 4 with cows scoring 3 or 4 classified as lame. The proporti...

YILDIZ, E. and N. TODOROV, 2014. The comparison of the main protein sources for dairy cows. A review. Bulg. J. Agric. Sci., 20: 428-446 Review of now-a-day knowledge was made for nutritive value and effect on milk yield and composition of the main protein sources – soybean meal (SBM), sunflower meal (SFM), rapeseed (canola) meal (RSM), and dried distillers grain with solubles (DDGS) – in diets ...

BACKGROUND A nationwide survey on the microbial etiology of cases of subclinical mastitis in dairy cows was carried out on dairy farms in Sweden. The aim was to investigate the microbial panorama and the occurrence of antimicrobial resistance. Moreover, differences between newly infected cows and chronically infected cows were investigated. METHODS In total, 583 quarter milk samples were coll...

The aim of this study was to determine possible differences in the faecal microbiota of dairy cows infected with Mycobacterium avium subsp. paratuberculosis (Johne's disease) in comparison with noninfected cows from the same herds. Faecal samples from cows in 4 herds were tested for M. avium subsp. paratuberculosis by real-time PCR, and faecal bacterial populations were analysed by 454 pyrosequ...

Bovine viral diarrhoea virus (BVDV) is an important pathogen of dairy cattle. In this study, bulk milk samples representing a total of 4105 milking cows, from 18 dairy cattle herds in the suburb of Mashhad- Iran, were tested for presence of BVDV by the use of a nested reverse transcription polymerase chain reaction (Nested RT- PCR) assay. Non of the cows in the herds had been vaccinated against...

The study was carried out on 120 crossbred Holstein × Shahiwal dairy cows for a period of 150 days to quantify the influence of dietary energy and protein intake on yield and composition of milk. Total 12 dairy farms having similar housing systems and holding at least 20 dairy cows in between mid to late lactation were selected for study purposes. The farms were located in the peri-urban and ur...

Heat stress (HS) damages the global dairy industry by reducing milk yields and quality, harming health, and damaging the reproduction of dairy cows, causing huge economic losses each year. However, an understanding of the physiological mechanism of HS lactating dairy cows remains elusive. Here, a metabolomics study using LC-MS and (1)H NMR spectroscopy was performed to analyze the metabolomic d...