Abstract

VELASQUEZ-PENAGOS, José Guillermo et al. Reproductive indicators in bovine cohorts that drink treated water that comes from oil production as the only source in different dilutions with deep-well water. Cienc. Tecnol. Agropecuaria [online]. 2020, vol.21, n.1, pp.1-10.  Epub Dec 30, 2019. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol21_num1_art:1372.

The effect of consuming treated water from oil production on the reproductive indicators of dualpurpose bovine females was assessed. The study was carried out at the municipality of Villavicencio, department of Meta, Colombia. Twenty-four F1 Cebu x Holstein Friesian cows were selected and randomly distributed in four treatments, each treatment with the permanent disposition of a previously tested reproductive bull. The selected groups consumed water at will of treated production under grazing conditions, as follows: 1. 100 % treated production water, 2. mixture of 50 % of treated production water and 50 % of deep-well water (DWW), 3. mixture of 25 % of treated production water and 75 % of DWW, and 4. 100 % of DWW (Control). The variables evaluated in each animal were: age at first birth (AFB), age at first conception (AFC), interval between births (IBB), birthconception interval (BCI), and the number of calves/cow per year or birth rate. The statistical analysis included Shapiro-Wilk and normality tests, one-way analysis of variance, and the Kruskal-Wallis test, employing the SPSS-22 software to carry out the analyses. The results found indicated for AFB and AFC between treatments, means that ranged from 20.8 and 25.1 months and 30.2 to 34.5 months, respectively, without significant differences (p > 0.05). The variables IBB, BCI, and birth rates showed means between 339 to 466 days, 57 to 184 days, and 0.78 to 1.08, respectively. No significant differences were found between the animals that consumed and did not consume treated production water.

Keywords : age at first birth; cattle; dual purpose; interval between births; reproductive behavior.

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