Effects of yeast (Saccharomyces cerevisiae) and clinoptilolite administration on milk yield and some metabolic parameters in early lactation dairy cows

This study was conducted to determine the effects of yeast (Saccharomyces cerevisiae) and clinoptilolite mixture on milk yield and some blood parameters related to metabolism in early lactation dairy cows. Twenty animals were selected from early lactation cows at 28 days in milk which were having similar milk yield and didn’t show any symptom of metabolic diseases through transition period up to 28 days in milk. These cows were randomly assigned to two groups: control and treatment. Blend (yeast 60%, clinoptilolite 40%) was orally administrated 50 g/day to all treatment cows shortly after the afternoon milking through 4 weeks. The same basal ration was provided for all cows. Blood samples were collected from all cows on 21, 28, 35, 42 and 49th days of lactation and analyzed for NEFA, BHBA, total cholesterol, total protein, BUN, glucose, AST, ALT, GGT. Yeast and clinoptilolite administration increased milk yield (p<0.01) and this increase accelerated by proceeded weeks. Moreover, NEFA (p<0.01) and ALT (p<0.01) was increased but other blood parameters did not change in this study (p>0.05). Oral administration of yeast and clinoptilolite to early lactating dairy cows increased the milk yield but it had no significant effect on serum metabolites