Abstract

MARINI, P.R.; CHARMANDARIAN, A.; KRUPICK, M.  and  DI MASSO, R.J.. Hip height, milk production and reproductive performance in dairy cows raised under grazing. Arch. zootec. [online]. 2011, vol.60, n.232, pp.1181-1189. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000400033.

The aim of this study was to characterize the relationships between hip height as an indicator of body size, with different productive and reproductive indicators in dairy cows kept on pasture; in an attempt to identify biotypes with different aptitudes in this type of system. A comparison of productive and reproductive variables was made among Holstein cows of the third lactation, of different body sizes, which coexist in grazing systems. There were no statistically significant differences (p>0.05) among larger and smaller cows neither in reproductive traits nor in their productive performance. Four biotypes were identified. For the typical pampa dairy production grazing system the most efficient biotype is that of lower height and average milk production.

Keywords : Body size..

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