产奶量kg.ppt

Heat Detection 发情鉴定 Heifers 1st lact. 2+ lact. All cows Total ?Distribution of cycles % % % % % 5-17 days -- 7.14 3.33 4.55 3.51 18-25 days 76.92 35.71 30.00 31.82 42.11 26-35 days 7.69 7.14 16.67 13.64 12.28 36-60 days 15.38 50.00 50.00 50.00 42.11 Breeding interval产犊间隔 26.00 35.00 35.00 35.00 33.00 Heat Detection accuracy 发情鉴定准确率 80.00 60.00 60.00 60.00 64.00 Conception rate 受胎率 55.80 38.50 43.60 41.05 45.97 Pregnancy rate 妊娠率 44.64 23.10 26.16 24.63 29.42 AFIFARM Fertility table (JIB)金星牧场“阿菲金”繁殖报表 DHI Record Analysis Jinan conference 2011 发情周期分布情况Cycle length distribution 天 天 天 天 后备牛 1胎 2胎及以上 全部 后备牛 1胎 2胎及以上 全部 天 天 天 天 Breeding Intervals 发情周期分布 以色列2009年Heat detection statistic Israeli Herd-book 2009 发情周期分布Cycle length distribution 后备牛 1胎 2胎及以上 全部 DHI Record Analysis Jinan conference 2011 DHI Record Analysis Jinan conference 2011 ? JX DM ZHY Age at first calving (months) 初产月龄 28 27 25.5 Calving interval (days) 产犊间隔 436 419 409 Milking days 泌乳天数 370 350 339 Full lactation milk production kg 胎次产奶 11,100 11,760 12,746 Three farms comparison of same production parameters DHI Record Analysis Jinan conference 2011 Why heat detection is so important ?为什么发情鉴定如此重要 DHI Record Analysis Jinan conference 2011 Somatic Cell CountSCC体细胞数 DHI Record Analysis Jinan conference 2011 Mastitis and Somatic cell count乳房炎和SCC The main disease that affect milk yield of dairy cows is mastitis. 乳房炎是影响牛只产奶量的主要疾病 A high SCC is an indication of chronic, subclinical mastitis in the herd and is also an indication of significant economic losses. 高体细胞数是临床、隐性乳房炎的指标之一 ，也是经济损失的指标 Mastitis is the most important factor affecting the SCC of an individual cow. 对于奶牛个体来说，乳房炎是影响SCC的最重要因素 General agreement values: less than 100,000 cells/ml for uninfected cows and greater than 300,000 for cows infected with significant pathogens. 一般认为：少于每ml奶中