大蒜油和肉桂酸复合物对奶牛生产性能及营养物质消化的影响

本研究旨在考察大蒜油和肉桂醛复合物(GAR-CIN)对奶牛生产性能、乳品质、营养物质消化及血液生化指标的影响。荷斯坦泌乳奶牛50头随机分成2组,每组25头,对照组饲喂基础日粮,试验组在基础日粮的基础上添加30 g/d.头的GAR-CIN,饲养试验时间75 d。结果表明:GAR-CIN能显著提高泌乳日龄为90～120 d的奶牛的平均产奶量(P<0.05),显著降低体细胞数(P<0.05)。两步法离体消化试验的结果显示,GAR-CIN能显著提高奶牛干物质体外消化率(P<0.05);内源指示剂法的结果显示,GAR-CIN能极显著提高日粮的干物质、中性洗涤纤维和酸性洗涤纤维的消化率(P<0.01);此外,添加GAR-CIN使奶牛血清尿素氮和葡萄糖的含量显著降低(P<0.05),血清中IgM含量显著提高(P<0.05)。说明,GAR-CIN能显著提高泌乳日龄为90～120 d奶牛的产奶量,改善乳品质,增强奶牛的免疫功能,促进奶牛对营养物质的消化。

Effects of the compound of garlic oil and cinnamaldehyde on production performance and nutrient digestibility

This experiment was conducted to study the effect of the compounds of garlic oil and cinnamaldehyde(GAR-CIN)on production performance,milk quality,nutrient digestibility,serum biochemical indices in dairy cows.50 dairy cows were randomly assigned to two treatments with 25 dairy cows in each.The cows were fed basal diet supplemented with 0 g/d and 30 g/d GAR-CIN,respectively.The feeding trial lasted for 75 days.The results showed that GAR-CIN could increase milk yield of dairy cows during 90 ～ 120 days of lactation period significantly(P < 0.05);and decrease somatic cell count in milk significantly(P < 0.05).GAR-CIN increased digestibility of dry matter in vitro significantly in two steps in vitro digestion trial(P < 0.01).Adding GAR-CIN to diet could increase digestibility of dry matter,neutral detergent fiber and acid detergent fiber in endogenous indicator method(P < 0.01).More over,urea nitrogen and glucose of blood serum significantly decreased(P < 0.05) and serum IgM could significantly inerease(P < 0.05).These results indicated that GAR-CIN could increase milk yield during 90 ～ 120 days of lactation ageindays,milk quality,immune function and the nutrient digestibility.