虫草类真菌饲料添加剂对奶牛生产性能和肠道完整性的影响

Effects of Cordyceps Fungus Feed Additives on Performance and Intestinal Integrity of Dairy Cows

本试验旨在研究虫草类真菌饲料添加剂对奶牛生产性能和肠道完整性的影响。选取180头胎次、泌乳天数相近的泌乳中期荷斯坦奶牛,随机分为2组,每组90头。对照组饲喂基础饲粮,试验组饲喂基础饲粮+30 g/(d·头)虫草类真菌饲料添加,试验期70 d。结果表明:1)试验组产奶量、乳脂率、乳蛋白率和乳总固体物含量平均值分别比对照组高0.83%、2.61%、1.68%和2.01%(P>0.05),试验组乳糖率和乳非脂固体物含量平均值显著高于对照组(P<0.05)。2)试验组乳中体细胞数平均值显著低于对照组(P<0.05)。3)试验第70天,试验组的血浆D-乳酸含量显著低于第1天、第42天(P<0.05)。4)试验组干物质、粗蛋白质、粗脂肪、中性洗涤纤维和酸性洗涤纤维表观消化率与对照组差异不显著(P>0.05)。综上所述,饲粮中添加虫草类真菌饲料添加剂可显著提高奶牛乳糖率、乳非脂固体物含量,显著降低乳中体细胞数,提高奶牛乳品质和肠道完整性。

This experiment was aimed to investigate the effects of cordyceps fungus feed additives on performance and intestinal integrity of dairy cows.One hundred and eighty Holstein dairy cows in mid-lactation with similar parities and days of lactation were randomly allocated to 2 groups with 90 cows in each group.Cows in the control group were fed a basal diet,and the others in trial group were fed the basal diet+30 g/(d·head)cordyceps fungus feed additives.The experiment lasted for 70 days.The results showed as follows:1)the means of milk yield,milk fat rate,milk protein rate and milk total solids content of trial group were increased by 0.83%,2.61%,1.68%and 2.01%compared with the control group(P>0.05),and the means of lactose rate and non-fat solids content of trial group were significantly higher than those of the control group(P<0.05).2)The mean of milk somatic cell count of trial group was significantly higher than that of the control group(P<0.05).3)At day 70 of the trial,the plasma D-lactic acid content was significantly lower than that at day 1 and day 42(P<0.05).4)The apparent digestibility of dry matter,crude protein,crude fat,neutral detergent fiber and acid detergent fiber of trial group had no significant difference with the control group(P>0.05).In conclusion,dietary added cordyceps fungus feed additives can significantly improve the lactose rate and non-fat solids content,significantly decrease the milk somatic cell count,improve the milk quality and intestinal integrity of dairy cows.