试验四奶牛泌乳曲线的绘制

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. 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34567891011121291822.5151075.541.5228.52222151075.541.5318282121151075.541.54182821.521141075.541520282321141075.54162028.524211496.55.53.5171928.52420.513.596.55.53.51821282420.513.596.553.51922282520.513.596.553.511022272520.513.586.553112226.525.520.513.586.55312232326201386.5531323.52226.5201386.55314242227.5191386531525222619.5138653162514261913864.53172514.525.519138652.51825142519138652.51925122519127.564.52.52025122519127.564.52.521261224.518127.564.52.52225.51324.51810.57.564.52.52326.512241810.57.564.52.52426.5142418117.55.54.52.52527142418.5127.55.5422627.5152418.510.575.54227281623.5181075.542282816.523161075.541.529281623161075.541.5302815.523151075.541.53128.523105.541.5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34567891011121292422.51714.5129.57.552292422.51714.5129.57.553292422.51714.5129.57.554292422.51714.5129.57.54.55292422.51714.5129.57.54.56292422.51714.5129.57.5473024221714.5129.57.5483024221714.511.59.5749302522171411.59.573.510302522171411.59.573.5113023.522171411.5973.512132823.52216.51411.5972.513152723.52116.51411.5972.514152823.52116.51411.596.52.515162623.52116.51411.596.5216172523.52116.51411.596.51.517172523.52116.5141196.518182523.52116.513.51196...