The influence of probiotic additives or multienzyme composition on blood biochemical parameters and milk quality of Lithuanian Black-and-White cattle

ABSTRACT The aim of the study was to determine the effect of Saccharomyces cerevisiae, multienzyme composition supplementation on milk yield, quality, blood biochemical parameters of Lithuanian-Black-and-White cows. For this reason 28 cows were divided into four groups (three experimental and one control) each with seven cows fed balanced ration (control group) and following experimental groups: addition of 40g supplement of live yeast with organic selenium (group A); 40g supplement of live yeast with aromatic additives (group B); and 0.2g supplement of multienzyme composition (group C) during a 90 days period. The study showed that milk yield was 2.64%, 1.75%, 1.4% higher in groups A, B, C respectively, comparing with the control group. The milk SCC in experimental groups were lower comparing to the control group. The percentage of milk fat was significantly higher in group A - 0.33%, B - 0.31% and C - 0.16% comparing with the control group. All used additives ensure positive dynamics of investigated biochemical parameters in cattle blood. The results indicated that probiotic additives and multienzyme composition supplementation to dairy cows increased cows productivity and milk fat as well. Probiotic additives supplementation decreased SCC values in milk.

摘要 本研究旨在探究酿酒酵母（Saccharomyces cerevisiae）复合多酶制剂补充剂对立陶宛黑白花奶牛产奶量、乳品质及血液生化指标的影响。为此，试验选取28头健康奶牛，分为4组（3个试验组与1个对照组），每组7头。对照组饲喂基础平衡日粮；试验组分别添加如下制剂：A组添加40g含有机硒的活酵母补充剂；B组添加40g含芳香类添加剂的活酵母补充剂；C组添加0.2g复合多酶制剂，试验周期为90天。试验结果表明，相较于对照组，A、B、C组的产奶量分别提升2.64%、1.75%、1.4%；试验组牛乳体细胞计数（SCC）均低于对照组。乳脂率方面，A组较对照组升高0.33%，B组升高0.31%，C组升高0.16%，提升幅度均具有统计学显著性。所有受试添加剂均可使奶牛血液生化指标呈现正向变化趋势。本研究结果显示，向泌乳奶牛日粮中添加益生菌制剂与复合多酶制剂，可提升奶牛生产性能与乳脂率；同时益生菌制剂可降低牛乳体细胞计数。