根据岩溶状况史无前例

C. Lischer, M. Wehrle, H. Geyer, B. Lutz, P. Ossent
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引用次数: 3

摘要

在瑞士中部选定的山地牧场,实地研究了奶牛爪损的严重程度、局部和发生率及其愈合过程,为期三个月。选取60头泌乳期至少120天的奶牛,比较其愈合过程和生化指标。141头奶牛中有197例爪损。诊断为鞋底溃疡(38%)和白线病变(62%)。在夏季学期的上半学期和下半学期,爪状病变的数量相等,尽管更严重的病变主要发生在下半学期(89%)。病变通过手术治疗,受影响的爪子被抬在木块或塑料鞋上。角密层形成的平均时间为14天。在每次哺乳期产奶量超过5500公斤的奶牛中,以及在夏季学期的后半段,观察到愈合过程延迟。延迟愈合奶牛的游离脂肪酸和β -羟基丁酸浓度显著高于正常愈合奶牛,血浆AST酶活性显著高于正常愈合奶牛。这表明,在较艰苦的高山牧场条件下,产奶量相对较高的奶牛触及了身体能力的极限,这也可能影响爪伤的愈合过程。
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Heilungsverlauf von Klauenläsionen bei Milchkühen unter Alpbedingungen
The field study investigated severity, localisation and incidence of claw lesions of dairy cows and their healing process during a period of three months on selected mountain pastures in the central part of Switzerland. In 60 cows, which were at least 120 days in their lactation, the healing process was compared with the biochemical profiles. In 141 cows 197 claw lesions were recorded. Diagnosed were only sole ulcers (38%) and white line lesions (62%). In the first and second half of the summer term, the number of claw lesions was equal, although more severe lesions occurred mainly during the second half (89%). The lesions were treated surgically and the affected claw was elevated on a wood block or a plastic shoe. Average time for formation of a close layer of horn was 14 days. A delayed healing process was observed in dairy cows with an milk yield over 5500 kg per lactation, as well as in the second half of the summer term. Cows with a delayed healing process had significantly higher concentrations of free fatty acids and beta-hydroxybutyrate, and higher plasma enzyme activities for AST than cows with adequate healing process. This indicates that cows with a relatively high milk production touch upon the limits of their physical capacity under harder conditions on alpine pastures, which may affect also the healing process of claw lesions.
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