Barkema H W, Schukken Y H, Lam T J, Beiboer M L, Benedictus G, Brand A
Animal Health Service, Drachten, The Netherlands.
J Dairy Sci. 1998 Jul;81(7):1917-27. doi: 10.3168/jds.S0022-0302(98)75764-9.
Management practices associated with bulk milk somatic cell counts (SCC) were studied for 201 dairy herds grouped into three categories according to bulk milk SCC. The cumulative production of fat-corrected milk over 305 d of lactation and category for bulk milk SCC were highly correlated; herds within the low category had the highest milk production. Differences in bulk milk SCC among the categories were well explained by the management practices studied. This correlation was not only true for the difference between the high (250,000 to 400,000) and low (< or = 150,000) categories for bulk milk SCC but also for the difference between the medium (150,000 to 250,000) and low categories and the high and medium categories. Management practices that are known to be important for herds in the high category for bulk milk SCC, such as dry cow treatment, milking technique, postmilking teat disinfection, and antibiotic treatment of clinical mastitis, were also found to be important in the explanation of the difference between herds in the medium and low categories for bulk milk SCC. More attention was paid to hygiene for herds in the low category than for herds in the medium or high category. Supplementation of the diet with minerals occurred more frequently for cows in the low category for bulk milk SCC than for cows in the medium and high categories.
根据原料奶体细胞计数（SCC），将201个奶牛群分为三类，研究了与原料奶SCC相关的管理措施。泌乳305天期间的脂肪校正乳累计产量与原料奶SCC类别高度相关；低类别组的奶牛群产奶量最高。所研究的管理措施很好地解释了不同类别之间原料奶SCC的差异。这种相关性不仅适用于原料奶SCC高类别（250,000至400,000）与低类别（≤150,000）之间的差异，也适用于中类别（150,000至250,000）与低类别之间以及高类别与中类别之间的差异。已知对原料奶SCC高类别奶牛群很重要的管理措施，如干奶牛治疗、挤奶技术、挤奶后乳头消毒和临床乳腺炎的抗生素治疗，在解释原料奶SCC中类别和低类别奶牛群之间的差异时也很重要。与中类别或高类别奶牛群相比，低类别奶牛群更注重卫生。原料奶SCC低类别奶牛的日粮矿物质补充比中类别和高类别奶牛更频繁。
