Abstract

MARISCAL-AGUAYO, Valentina et al. Reproductive indicators of dairy cows in agribusinesses with different technological level in the Jalisco Highlands. agric. soc. desarro [online]. 2016, vol.13, n.3, pp.493-507. ISSN 1870-5472.

The reproduction of dairy cows can be affected by factors related to management. The objective of the study was to evaluate the reproductive behavior of dairy cows in agribusinesses with two technological levels (TL): transition and entrepreneurial, which use CHAPINGO-AGROPEC Star advice and consulting for technological development. Information from 17 agribusinesses was analyzed, which included 2041 cows and 5922 labors. The variables were: age at first labor (AFL), services per conception (SPC), open days (OD), interval between labors (IBL), interval to first post-partum heat (IFPH), and interval to first postpartum service (IFPS). A mixed model was considered, which included the effects of number (NP), year (AP) and season (SP) of labor (using initials in Spanish), TL and agribusiness (AE), and the double significant interactions between these effects. Significant differences were obtained (p≤0.05) in TL for the IFPH and IFPS indicators; the interaction of TL by AP, in addition to having an effect on these two variables, also influenced the AFB. The entrepreneurial TL presented lower IFPH and IFPS (63.8±6.2 and 75.7±5.5 d) than the transition TL (90.8±2.7 and 91.1±2.3 d). The reproductive behavior of cows in the two TLs was similar because there were no significant differences in AFB, SPC, OD and IBL.

Keywords : bovines; stratification; livestock production; reproduction.

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