荷斯坦母牛生长曲线拟合研究
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摘要
为探讨荷斯坦母牛生长发育规律,并拟合其生长曲线,本研究收集江苏某大型奶牛场7251头次3~24月龄荷斯坦母牛体高、胸围、体斜长、体重和平均日增重等数据,分别采用Logistic、Gompertz、Brody、Bertallanffy和Wood 5种模型对其生长情况进行拟合与分析。结果表明:5种曲线模型的拟合指数R2均大于0.860,Bertallanffy模型对荷斯坦母牛体高和体重拟合效果最佳,拟合度分别是0.982和0.996;Brody模型对胸围的拟合效果最佳,拟合度为0.988;Logistic模型对体斜长的拟合最佳,拟合度为0.991。由Wood模型对平均日增重的拟合度为0.915。荷斯坦母牛在5~6月龄平均日增重速度最快,生长强度最大。随着月龄增加,其生长速度与强度逐渐下降。
In order to explore the law of growth and development of Holstein cows and fit their growth curve,the data of body height,chest circumference,body length,body weight and average daily growth from 7251 Holstein cows aged from 3 to 24 months in a dairy farm were collected.Five models,namely,"Logistic","Gompertz","Brody","Bertallanffy"and"Wood"were used to analyze the fitting of their growth.The results showed that the fitting index(R2)value of all five curves were greater than 0.9800."Bertallanffy"model had the best fitting effect on body height and body weight in Holstein cows,whose fitting degrees were 0.982 and 0.996,respectively.The"Brody"model"and Logistic"model had the best fitting effect on chest circumference(R2=0.9880)and body length(R2= 0.991),respectively.The fitness of"Wood"model on average daily growth was 0.915.The average daily growth rate was shown highest in 5~6 months of age,and gradually decreased with age.
In order to explore the law of growth and development of Holstein cows and fit their growth curve,the data of body height,chest circumference,body length,body weight and average daily growth from 7251 Holstein cows aged from 3 to 24 months in a dairy farm were collected.Five models,namely,"Logistic","Gompertz","Brody","Bertallanffy"and"Wood"were used to analyze the fitting of their growth.The results showed that the fitting index(R2)value of all five curves were greater than 0.9800."Bertallanffy"model had the best fitting effect on body height and body weight in Holstein cows,whose fitting degrees were 0.982 and 0.996,respectively.The"Brody"model"and Logistic"model had the best fitting effect on chest circumference(R2=0.9880)and body length(R2= 0.991),respectively.The fitness of"Wood"model on average daily growth was 0.915.The average daily growth rate was shown highest in 5~6 months of age,and gradually decreased with age.
引文
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[13]曹露,李想,董刚辉,等.北京地区荷斯坦奶牛不同产犊季节与胎次泌乳曲线拟合[J].黑龙江畜牧兽医,2016(8):98-101.
[14]中国农业大学动物科技学院分子数量遗传团队.中国荷斯坦牛平衡育种之繁殖性能选择[J].中国奶牛,2017(1):63.
[2]刘绍贵,雷衡,李春平,等.云南荷斯坦奶牛生长发育性状初步研究[J].云南畜牧兽医,2010(S1):16-19.
[3]徐成江.荷斯坦奶牛改良效果分析[J].湖北畜牧兽医,2016,37(4):48-49.
[4]毛永江,杨章平,王杏龙,等.中国荷斯坦牛早期生长曲线拟合研究[J].中国畜牧杂志,2009,45(3):1-4.
[5]张丽,张良志,张爱玲,等.南阳黄牛体重曲线拟合的比较分析[J].广东海洋大学学报,2008(1):98-100.
[6]再娜古丽·君居列克,谈锐,黄锡霞,等.新疆褐牛种公牛体重生长发育曲线拟合[J].中国畜牧兽医,2014,41(4):211-215.
[7]戴国俊,王金玉,杨建生,等.应用统计软件SPSS拟合生长曲线方程[J].畜牧与兽医,2006(9):28-30.
[8]WOOD P D P.Algebraic model of the lactation curve in cattle[J].Nature,1967,216(10):164-165.
[9]蒋昊,吴宏军,刘爱荣,等.三河牛种公牛生长曲线拟合研究[J].黑龙江畜牧兽医,2017(2):58-60.
[10]吴瑜婷,刘兰,蔡宇威,等.不同精粗比日粮对鲁西黄牛犊牛血液生化指标的影响[J].黑龙江畜牧兽医,2017(20):116-118.
[11]冯秀娟.新生犊牛的饲养管理技术[J].当代畜禽养殖业,2017(8):16-17.
[12]HOELKER M,KASSENS A,SALILEW-WONDIM D,et al.Birth of healthy calves after intra-follicular transfer(IFOT)of slaughterhouse derived immature bovine oocytes[J].Theriogenology,2017,97:41.
[13]曹露,李想,董刚辉,等.北京地区荷斯坦奶牛不同产犊季节与胎次泌乳曲线拟合[J].黑龙江畜牧兽医,2016(8):98-101.
[14]中国农业大学动物科技学院分子数量遗传团队.中国荷斯坦牛平衡育种之繁殖性能选择[J].中国奶牛,2017(1):63.