作者: L.A. Espejo , M.I. Endres
DOI: 10.3168/JDS.S0022-0302(07)72631-0
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摘要: The objective of this study was to investigate the association some herd-level factors with prevalence lameness in 53 high-production groups Holstein cows housed on 50 commercial dairy farms having freestall barns Minnesota. Cows group (n = 5,626) were scored for locomotion (score 1 5, where normal and 5 severely lame) estimate (locomotion score ≥3) group. Herd-level variables used explain variation among groups. Among tested, herd size, pen space per cow, type size milking parlor, total mixed ration content crude protein neutral detergent fiber, feeding frequency, linear feedbunk feed barrier, use footbath did not show any univariate analysis screening test included multivariate model. Pen stocking density (cows 100 stalls), daily distance between number full-time employee equivalent, cud chewing index, eliminated from model backwards stepwise procedure. Daily time away positively associated lameness, whereas cow comfort quotient negatively lameness. Prevalence greater when performed hoof trimming only manager decided needed it because overgrowth or compared which feet all trimmed a maintenance schedule once twice annually. Brisket board height more than 15.24 cm presence area behind brisket filled concrete Most these could be managed reduce farms.