实验四奶牛泌乳曲线的绘制.doc

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1、实验四乳牛泌乳曲线的绘制与分析一、实验目的和要求通过累计各泌乳月份的产乳量及绘制泌乳曲线图，学习乳牛生产力水平的分析方法。二、实验材料两头泌乳母牛各一个泌乳期的产乳原始记录。（1）2011号奶牛第二个泌乳期的产乳量统计表（表1）（2）2015号奶牛第五个泌乳期的产乳量统计表（表2）（3）计算器三、实验方法及步骤1．根据表1、表2日产乳量统计表计算出全期实际产乳天数、实际产乳量、全期平均产乳量，并查出全期最高日产乳量。2.累计各泌乳月的产乳量（自产犊日起，每30天为一个泌乳月份）。3.计算出各泌乳月份的日平均产乳量（最后一个泌乳月不足30天时，按实际天数计算其平均值）。4

2、.用曲线绘制成图。5.填写乳牛泌乳性能分析表。6.对比两头牛的泌乳曲线和有关数据，分析其不同特点及具体的优缺点，以确定其生产力水平的高低。表1、2011号牛（中国荷斯坦牛）第二个泌乳期日产乳量统计表kg月日34567891011121　291822.5151075.541.52　28.52222151075.541.5318282121151075.541.54182821.521141075.541520282321141075.54162028.524211496.55.53.5171928.52420.513.596.55.53.51821282420.513.5

3、96.553.51922282520.513.596.553.511022272520.513.586.553112226.525.520.513.586.55312232326201386.5531323.52226.5201386.55314242227.5191386531525222619.5138653162514261913864.53172514.525.519138652.51825142519138652.51925122519127.564.52.52025122519127.564.52.521261224.518127.564.52.52225.

4、51324.51810.57.564.52.52326.512241810.57.564.52.52426.5142418117.55.54.52.52527142418.5127.55.5422627.5152418.510.575.54227281623.5181075.542282816.523161075.541.529281623161075.541.5302815.523151075.541.53128.5　23　10　5.541.5表2、2015号牛（中国荷斯坦牛）第二个泌乳期日产乳量统计表kg月日34567891011121　292422.51714.5

5、129.57.552　292422.51714.5129.57.553　292422.51714.5129.57.554　292422.51714.5129.57.54.55　292422.51714.5129.57.54.56　292422.51714.5129.57.547　3024221714.5129.57.548　3024221714.511.59.5749　302522171411.59.573.510　302522171411.59.573.511　3023.522171411.5973.512132823.52216.51411.5972.5131527

6、23.52116.51411.5972.514152823.52116.51411.596.52.515162623.52116.51411.596.5216172523.52116.51411.596.51.517172523.52116.5141196.518182523.52116.513.51196.519202523.52116.513.51196.520232523.52116.513.5118.56.521232523.5211513.5118.562225.52523211513.510.58.562325.52523211513.510.58.5624

7、25.52423191513.510.58.562526242318.515.513.510.58.562626242318.515.513.510.58.562727242318.515.51310.58.562827242318.515.51310.58.51.52927242318.515131085.53028242218.515131085.53128　22　15　1085.5　表3乳牛泌乳性能分析表场别　品种　牛号　年龄岁产次第产产犊日期年月日干乳日期年月日全期实际产乳天数　全期实际产乳量　全期平均日产乳量　　全期最高日产乳量