检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:苏俊强 王建亮 梁海锋[2] 窦建翠 王运新 车振华
机构地区:[1]徐闻县畜牧局,广东徐闻524100 [2]湛江海洋大学农学院,广东湛江524088
出 处:《湛江海洋大学学报》2002年第6期65-68,共4页Journal of Zhanjiang Ocean University
摘 要:通过对某奶牛场泌乳牛群隐性乳房炎的调查和分析 ,研究了奶牛隐性乳房炎的发生规律。结果表明 ,该场奶牛隐性乳房炎的阳性率为 31.4 2 %、乳区临诊阳性率达到 10 .6 0 % ;隐性乳房炎的发生随着胎次和泌乳时间的增加而增加 ;左乳区阳性率高于右侧 ,前乳区高于后乳区。在牛群(场 )里进行经常性的临床和实验室检验是必要的。Investigation and analysis were conducted to study the subclinical mastitis in dairy cows in a farm. The results showed that the incidence of subclinical mastitis in dairy herd were 31.42% and the clinincal positive example in those animals comes to 10.60%. The subclinical mastitis cows increased as the dariy parturient and lactation time increased. The positive rate of subclinical mastitis is higher at the left mammary gland than that of the right one, also,the positive rate of the front mammary gland is higher than that of the back one. The productivity and economic benefit were dropped sharply caused by this chronic disease?It is necessary for the herd to be often checked with clinical and laboratory method.
关 键 词:奶牛 隐性乳房炎 发生规律 阳性率 胎次 泌乳月
分 类 号:S858.23[农业科学—临床兽医学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.117