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Abstract：
Milkability is defined as the ability of an animal to give a regular, complete, and rapid milk secretion by the mammary gland in response to a proper milking technique. The aim of the present study was to investigate the relationship of milkability pattern with milk yield and somatic cell score in buffaloes. Milk yield and milkability can be observed through the milk flow profiles recorded by an electronic milkmeter (Lactocorder). A total of 2,288 milk flow curves of Mediterranean Italian buffaloes were used for one-way analysis of variance, and eight milk emission patterns were studied. The most represented milk flow curve was type 3 (27.32%), followed by type 6 (17.79%) characterized by a very long plateau phase. The less represented curve was type 1 (4.41%) characterized by long lag time and low peak flow rate. According to analysis of variance, milk yield ranged from 2.21 to 5.22 kg per milking for types 1 and 6, respectively, whereas the peak flow rate was minimum (0.50 kg/min) and maximum (1.73 kg/min) for types 1 and 4, respectively. The total milking time was on average 11.29 ± 3.68 min; lag time and milk emission time averaged 2.19 ± 2.34 min and 4.30 ± 2.33 min, respectively. The 12.5% (n = 286) of total curves were classified as bimodal and 60 of these were found in type 4. Based on literature, type 4 curves are representative of very short teat canals and very high milk flow. Average somatic cell score was 3.63 ± 1.67 units, with maximum least-squares mean found for type 1 and minimum for type 6. Buffaloes showing curves of type 5 and 6 were characterized by the greatest milk yield at milking, lowest somatic cell score, and lowest milking time. Results of the present study evidenced that such traits could be used in the dairy buffaloes as indicators to improve udder health and milkability.
摘要：
乳能力被定义为动物给予常规的能力，完成,以及乳腺在适当的挤奶技术下的快速乳汁分泌。本研究的目的是研究水牛的挤奶性模式与产奶量和体细胞评分的关系。通过电子奶度计（Lactocorder）记录的牛奶流量曲线可以观察到牛奶产量和挤奶能力。总共使用了2,288条地中海意大利水牛的牛奶流量曲线进行了单向方差分析，研究了八种牛奶排放模式。代表最多的牛奶流量曲线是3型（27.32％），其次是6型（17.79％），其特征是很长的平台期。表现较少的曲线是1型(4.41%),其特征在于长滞后时间和低峰值流速。根据方差分析，类型1和类型6的产奶量分别为每次挤奶2.21至5.22千克，而1型和4型的峰值流速分别为最小值（0.50kg/min）和最大值（1.73kg/min）。总挤奶时间平均为11.29±3.68min；滞后时间和排奶时间平均为2.19±2.34min和4.30±2.33min，分别。总曲线的12.5％（n=286）被分类为双峰，其中60种被发现为4型。根据文献,4型曲线代表非常短的乳头管和非常高的牛奶流量。平均体细胞评分为3.63±1.67个单位，最大最小二乘平均值为1型，最小值为6型。显示5型和6型曲线的水牛在挤奶时的产奶量最大，最低体细胞得分，和最低的挤奶时间。本研究的结果表明，这些性状可作为改善乳房健康和挤奶性的指标。
