Capote J, Argüello A, Castro N, López J L, Caja G
Canary Agronomic Science Institute, La Laguna, Tenerife, Spain.
J Dairy Sci. 2006 Jun;89(6):2076-9. doi: 10.3168/jds.S0022-0302(06)72276-7.
Tinerfeñ a breed goats were assigned to 2 experimental herds and milked once (n = 28) or twice (n = 24) daily to study correlations between udder morphology, milk yield, and milking ability during the middle stage of the first lactation. Pearson correlation coefficients were significantly higher between yield and measures of udder globulousness (udder volume, r = 0.79 and r = 0.59; perimeter of insertion of the udder, r = 0.47 and r = 0.37; distance between teats, r = 0.77 and r = 0.28, for goats milked once and twice daily, respectively) than for length parameters (cistern floor distance, r = 0.40 and r = -0.29; udder depth, r = -0.20 and r = 0.20). The globulousness of the udder was correlated with easier milking ability, as shown by milk fractioning (r = 0.49 to 0.70) and milk flow measures (r = 0.32 to 0.49). The results showed that the globulousness of the udder is more important than length measurements in assessing milk yield and milking ability.
将蒂内费纳品种的山羊分为2个试验群，分别每天挤奶1次（n = 28）或2次（n = 24），以研究头胎泌乳中期乳房形态、产奶量和挤奶能力之间的相关性。产奶量与乳房球状度指标（乳房体积，r = 0.79和r = 0.59；乳房附着周长，r = 0.47和r = 0.37；乳头间距，每天挤奶1次和2次的山羊分别为r = 0.77和r = 0.28）之间的皮尔逊相关系数显著高于长度参数（乳池底部距离，r = 0.40和r = -0.29；乳房深度，r = -0.20和r = 0.20）。乳房的球状度与更容易的挤奶能力相关，如乳汁分离（r = 0.49至0.70）和乳汁流速测量（r = 0.32至0.49）所示。结果表明，在评估产奶量和挤奶能力时，乳房的球状度比长度测量更重要。
