The effects of additional glycerol in different feed form on dairy cows [Süt ineklerinde farkli{dotless} yem formlari{dotless} ile gliserol ilavesinin etkileri]

This research was conducted to determine the impact of diet supplementation with glycerol in form of mash or pelleted feed on milk yield,milk composition,live weight and changes in body condition scoring and the effect of on blood plasma glucose,nonesterified fatty acids (nefa) and β-hydroxybutyrate (bhba) concentrations of dairy cows. in middle lactation stage,holstein dairy cows (n = 94) were divided into three main groups: (1) control (n = 40); (2) mash concentrated feed+ glycerol group (n = 27); and (3) pelleted concentrated feed + glycerol (n = 27). glycerol is added into concentrated feed at the rate of 5%. the study was lasted 69 d. there was not a significant difference among groups in terms of milk yield,body weight and plasma glucose,nefa and bhba concentrations. in the last day of study,milk solid non fat (snf) were higher and milk urea-n content were lower in pelleted feed+ glycerol group (p<0.05).