摘要
为了获得水牛乳能值(E,MJ/kg)与乳蛋白质(P)、乳脂肪(F)、乳中总固形物(TSC)及乳糖(L)含量的回归关系,本文对原有测定乳中热量的方法进行改良,采用经冷冻干燥仪冻干后获得乳粉的方法替代通过烘干获得乳粉的方法,再测定乳中热量,采集泌乳第2周至第11周的原乳样,共采集240份原乳样,资料完整的乳样个数实际为233。测定结果显示,水牛原乳的乳蛋白质、乳脂肪、乳总固形物和乳糖含量及乳能值分别为(4.7±0.2)%、(6.8±0.5)%、(17.0±0.5)%、(5.5±0.2)%和(4.4±0.2)MJ/kg。应用Excel2003内部函数LINEST求得水牛原乳中乳成分(%)与乳中热量(E,MJ/kg)之间的回归关系如下:E=0.3181F+0.3335P+0.0855L+0.4216(n=233,R2=0.828142,P<0.0001)、E=0.3257F+0.3267P+0.8709(n=233,R2=0.82004586,P<0.0001)、E=0.346781TSC+0.011291F-1.446069(n=233,R2=0.826169,P<0.0001)、E=0.352496TSC-1.48811(n=233,R2=0.825623,P<0.0001)。由此可见,水牛乳能值与水牛乳蛋白质、乳脂肪及乳糖含量呈较强的线性回归关系,可通过水牛乳蛋白质、乳脂肪、乳糖及乳总固形物含量预测水牛乳能值。
The trial was conducted to study the relationships between milk energy（E,MJ/kg）and the contents of milk protein（P）,fat（F）,total solid content（TSC）and lactose（L）in water buffalo.The trial improved the milk energy determination method by using freeze-drying method to get milk powder instead of oven-drying method,and the raw milk samples were collected from the second week to the eleventh week of lactation.Two hundred and forty samples were collected for each parameter,and the final number of samples with complete information was 233.The results showed that the contents of milk protein,fat,total solid content and lactase,and milk energy were（4.7±0.2）%,（6.8±0.5）%,（17.0±0.5）%,（5.5±0.2）% and（4.4±0.2）MJ/kg,respectively.The relationships between milk energy（E,MJ/kg）and milk composition were calculated by the function of LINEST in Excel 2003.It was found that the milk energy could be estimated using the following equations：E=0.318 1F＋0.333 5P＋0.085 5L＋0.421 6（n=233,R2=0.828 142,P0.000 1）,E=0.325 7F＋0.326 7P＋0.870 9（n=233,R2=0.820 045 86,P0.000 1）,E=0.346 781TSC＋0.011 291F-1.446 069（n=233,R2=0.826 169,P0.000 1）and E=0.352 496TSC-1.488 11（n=233,R2=0.825 623,P0.000 1）.In conclusion,high correlation existed between water buffalo milk energy and the contents of milk protein,fat,lactose and total solid content,therefore,these equations could be used to estimate water buffalo milk energy.
出处
《动物营养学报》
CAS
CSCD
北大核心
2010年第4期964-968,共5页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
广西科学基金项目(桂科青0640033
桂科青0832071)资助
关键词
水牛乳
乳成分
乳能值
water buffalo milk
milk composition
milk energy
作者简介
作者简介：邹彩霞（1976-），女，壮族，广西贺州人，副研究员，博士，主要从事反刍动物营养研究。E-mail：caixiazou2002@hotmail．com
通讯作者：梁贤威，研究员，E-mail：liangbri@126．com；
夏中生，教授，硕士生导师，E-mail：zsxia@gxu．cdu．cn
