Evaluación reproductiva del hato lechero de la hacienda Pucate durante el período 2018-2020.

Abstract

The present research evaluated the reproductive parameters of the “Pucate” Farm located in Chambo canton, Chimborazo province during the period 2018-2020. The experimental units consisted of a total of 106 cows, from which reproductive records were collected based on: date of birth, date of first service, date of first calving, date of dry-off, confirmed pregnancy, calving date, sex of the calf. In the statistical analysis, the mean and standard deviation were calculated for the application of the chi-square goodness-of-fit test, thus obtaining the following parameters: age at first service (AFS/EPS), age at first calving (AFC/EPP), number of straws per conception (NSC/NPC), calving interval (CI/IEP), calving conception interval (CCI/IPC), gestation period (GP/PG) and drying period (DP/PS). For the fertility percentage (%P) was calculates according to the number off services of each cow and in the mortality percentage (%M), weanings (%D), birth by sex were analyzed according to the number od existing animals in 2018, 2019 and 2020. The results of evaluated variables were: AFS of 17,92±3,38 months, AFC of 27,52±4,07 months, NCS of 1,77±0,74, CI of 386,37±67,07days, CCI of 112,45±48,97 days, DP of 97,93±23,07 days, GP of 278,23±8,17 days, %F of 67,32 %, the highest %M was in 2018 and the highest %D was in 2019 and 2020. It is concluded that based on the chi-square analysis the AFC, AFC and DP data are not normally distributed so the observed results differ from the expected one. It is recommended to establish a follow-up to repeat cows, since it was also observed that CPI parameter exceeds the range established as optimal in a herd.