Citas bibligráficas
Bueno, W., (2018). Indices productivos y reproductivos en vacunos Brown Swiss, Jersey y Holstein en altura-Cooperativa Atahualpa Jerusalen, Cajamarca 1999-2013 [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/3526
Bueno, W., Indices productivos y reproductivos en vacunos Brown Swiss, Jersey y Holstein en altura-Cooperativa Atahualpa Jerusalen, Cajamarca 1999-2013 [Tesis]. : Universidad Nacional Agraria La Molina; 2018. https://hdl.handle.net/20.500.12996/3526
@mastersthesis{renati/242847,
title = "Indices productivos y reproductivos en vacunos Brown Swiss, Jersey y Holstein en altura-Cooperativa Atahualpa Jerusalen, Cajamarca 1999-2013",
author = "Bueno Cabrera, Wilder Aristides",
publisher = "Universidad Nacional Agraria La Molina",
year = "2018"
}
The objective of the study was to evaluate the reproductive (IR) and productive (IP) indices of cattle, Jersey (J), Brown Swiss (BS) and Holstein (H) in altitude conditions at Cooperativa Atahualpa Jerusalén, 3,350 masl, Cajamarca. Production records from 1999 to 2013 were analyzed using the Totally Azar Block Design and Tukey HSD (α = 0.05). (P<0.05) for the reproductive indexes: Age at first service (AFS); Age at first calving AFC; number of services per conception (NSC); days of gestation (DG); part conception interval PC-I; interval between parts (IBP); And productive indexes: Birth weight PN; conception rate (CR), but not in the pregnancy rate (PR) (P >0.05). Breed heifers (J) reached AFS at 19.70 ± 0.68 months, older age than large breeds (H) 23.77 ± 1.23 and (BS) 25 ± 0.79 months, NSC was higher in Jersey cows 2.11 versus 1.81 (H) and 1.73 (BS); With smaller DG of Jersey cows 279 days compared to H (280), and BS (288) cows. The IP-C averages, in each race (168, 199, 177) exceeded the expected values; With pregnancy rates, not significant (P>0.05) of 54.72, 54.66 and 58.26%. Corrected milk production (CMP) according to each breed Holstein, Brown Swiss, and Jersey 4332.60; 3747.03 and 3150.73 kg per campaign, with daily averages of 14.26; 12.29; 10.33 kg / cow / day. It was concluded that the Jersey breed was more precocious in the reproductive beginning; And where the PC-I three races, was very long, delaying the restart of the reproductive cycle, more than due, possibly influenced by adverse conditions of the environment
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