Evaluación de diferentes protocolos de sincronización para inseminación artificial en bovinos holstein mestizos , en la parroquia Licto, Cantón Riobamba, Provincia de Chimborazo

Abstract

It was posible to evaluate the effectiveness of different estrus synchronization protocols with artificial insemination in mestizo Holstein Cattle, in some herds in Licto-Riobamba, for which 40 cows received a treatment of control without hormones (T0), Hormone GnRH (T1), prostaglandins + GnRH (T2) and an intravaginal implant CIRD + estradiol benzoate + prostaglandin + GnRH (T3); with 10 repetitions each, giving a total of 40 experimental units (UE), where each of the U.E. was made up of a cow. The experimental results were submitted to a complete block design at random for continuous variables and separation of the averages according to Tukey statistical Chi square test for discrete and qualitative, determining that the best results were obtained by applying the hormone GnRH (T1) in where the highest values were achieved: repetition of estrus (30% in the first insemination and 10% in the second insemination), pregnancy rate, effectiveness of synchronization rate and fertility rate (70% in the first insemination and 90% in the second insemination) services per conception (1.4) and a cost benefit of $ 1.35, which means that for every dollar invested there is a return of 35 cents.