Aplicación de una autovacuna enriquecida de ozono para incrementar el peso de vaconas en la estación experimental Tunshi de la Escuela Superior Politécnica de Chimborazo.

Abstract

At the Tunshi experimental station of the Animal Science Faculty, Riobamba Canton, the productive performance of heifers due to the application of an autogenous vaccine enriched with ozone was assessed. This study was carried out to evaluate weight gain heifers. A total of 16 crossbred Holstein heifers at approximately 18 months old were used for this study. A completely randomized block design with four replicates was used, and the size of the experimental unit consisted of one heifer per treatment. It was evaluated by different levels of blood: A0 (control treatment) (blood with 25 mg of ozone), A5 (5ml of blood with 25 mg of ozone), A10 (10ml of blood with 25 mg of ozone), and A15 (15ml of blood with 25 mg of ozone). They were applied once a week during five weeks in a row. The experimental results were subjected to a variance analysis (ADEVA) and the media separation was done using a Tukey test with a significance level of (P < 0.05) and (P < 0.01). The variables of the productive parameters showed highly significant differences: weight gain (17.25 kg) throughout the research phase. The most efficient feed conversion was 26.99, and the best body condition was 3.0. During the economic evaluation, the best benefit cost ratio was $1.50, that is to say, $0.50 was earned per each dollar invested. Furthermore, animal hair improved. We conclude that A15 (15 ml of blood with 25 mg of ozone) improves the productive performance of livestock and has a higher profitability compared to the rest of the treatments. It is recommended to use A15 treatment and 20 and 25 ml of blood in the application of an autogenous vaccine because it is more efficient in weight gain.