酵母培养物益康XP对奶牛血浆内毒素含量及其它指标影响的研究  

Influence of Yikang XP on Plasma Endotoxin Concentration and Additional Indexes in Lactating Cows

作　　者：罗安智[1] 齐长明[1] 陈华林 薄林 王秀芹 王文成 闫庆 

机构地区：[1]中国农业大学动物医学院,北京100094 [2]北京三元兽医总站,北京100085 [3]北京长阳奶牛中心四场,北京102600

出　　处：《中国奶牛》2005年第2期12-15,共4页China Dairy Cattle

摘　　要：选取泌乳初期(泌乳天数<40d)健康奶牛12头,按胎次、泌乳天数和产奶量相同或相似的原则进行配对,分为试验组和对照组。两组日粮组成相同,但试验组牛每天添加益康XP(剂量为试验第1-7d500g/头/d,从第8d后减少到120g/头/d,分两次饲喂)。试验期为60d。于试验前1d、试验第20d、40d、60d分别采血,用鲎试剂法测定血浆内毒素含量;定期测定日均产奶量、乳脂率、乳蛋白率和体细胞数;并记录情期受胎率及疾病发生情况。结果表明:试验组奶牛在试验后第20d、40d、60d血浆内毒素均极显著低于对照组(p<0.01);产奶量在第20d、60d显著高于对照组(p<0.05);两组奶牛乳脂率、乳蛋白率、体细胞数差异均不显著(p>0.05);试验组情期受胎率极显著高于对照组(p<0.01);在疾病发生率方面,试验组极显著低于对照组(p<0.01)。Twelve early lactating(DIM<40d)Holstein cows were randomly allotted to 2 groups based on calving number,days in milk and milk production.Cows were fed a basal diet and treatments were control and control plus Yikang XP(500g/cow per d from d 1 to 7,and 120g/cow per d after 7 d)with six cows per group.Experimental periods were 60 d.Blood samples were collected ld before feeding XP,20d,40d,60d after adding XP.Limulus test was used to detect plasma endotoxin concentration(PEC).Mean daily milk yield,milk fat,milk protein and somatic cell counts were measured periodicly.Non-return rate and morbidity were registered simultaneously.The results indicated:Compared with the control group,the mean PEC of test group was decreased by 0.925Eu/ml(p<0.01),1.137Eu/ml(P<0.01) and 0.913Eu/ml(P<0.01)respectively at 20d,40d,and 60d after feeding XP;Milk production was increased by 2.9kg(P<0.05)and 3.61kg(P<0.05)at 20d and 60d;Milk fat percentage,milk protein percentage and Somatic cell counts were not statistically different between treatments(p>0.05),Non-return rate was increased significantly(P<0.01),and morbidity rate was lower in cows fed XP than in cows receiving control diet(p<0.01).

关 键 词：奶牛 产奶量 试验 酵母培养物 泌乳天数 情期受胎率 乳蛋白率 对照组 血浆内毒素 含量 

分 类 号：S823[农业科学—畜牧学] S858[农业科学—畜牧兽医]