2014年3月 第2期(总第165期) 草食家畜(双月刊) [4]王相根,胡书梅,汪聪勇.奶牛体细胞数(SCC)和隐性乳房炎变化规律的统计调查[J].中国奶牛,2012, (14):49 ̄50. [5】刘俊栋,王春,王敖.奶牛隐性乳房炎的诊断[J].山东农业大学学报(自然科学版),2000,31(3):330 ̄ 332. [6]甘肃农业大学.兽医产科学(第二版)[M].北京:农业出版社,1988. 【7】孙宇,牛连信,张彦林.奶牛乳体细胞数的变化规律及其与乳成分的关系[J].畜牧与饲料科学, 2009。30(6):133. Study of Relationship between Parity and Sub-clinic Mastitis of Dairy Cattle by Useing the DHI XIAO Xi—-shanI,FU Jing-taoI,HUA Yong-mou],WANG Jing-fen2,JIANG Xiao-ping3,AN Yan——song4 (1.Beijing Vocational College of Agriculture,Beijing 102442,China; 2.Yanqing County Anmila Husbandry Technical Advice Station of Beijing,Yanqing Bering 102100,China; 3.Fangshan Distirct Disease Control and Prevention Center of Beijing,Beijing 102488,China; 4.Fangshan Distirct Agriculture Bureau of Beijing,Beijing 102488,China) Abstract:By analysis on the one year S DHI data of a daiy farrm,we studied the variation characteristics between different parity and somatic cell count of milk and Sub-clinic mastitis to provide scientific basis for making scientific and feasible control measures of sub—clinic mastitis. Key words:DHI;dairy cattle;parity;sub-clinic mastitis 最新国内羊肉价格波动情况(批发价) 单位:元/t 年份 01月 02月 2013矩 50,238.06 52。471.30 2014矩 56,577.84 57.177.90 比去年增长 12.62% 8.97% 03月 04月 05月 06月 07月 52。980.49 52.71 1.07 52.932.29 53,354.10 53.677.27 O8月 09月 1O月 53,691.21 53。912.10 54.060_45 l1月 12月 54.746.77 55.399.89 全年平均 数据来源:中国农业信息网 62 53,330.80 56.81 1.17 6.53%