Ciencias Agropecuarias
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Item Evaluación del encalostrado en un programa de levante de terneras Holstein en la hacienda Alli Llacta ubicada en el cantón Mejía de la provincia de Pichincha(2022-03) Masson Bedón, María Guadalupe; Aragadvay Yungán, GonzaloThe objective of the present investigation was to evaluate the colostrum managment in a program for raising Holstein calves through qualitative tests in both colostrum and blood serum, and also to carry out a follow-up to monitor the post-calostrated response of the calves in the first two months of life, respecting the lifting program already established in the farm. The methodology consisted in determine the quality of freshly milked colostrum and the supplied to the calves by using the colostrometer and estimate the amount of immunoglobulins present in the blood serum of the calves by using the glutaraldehyde test. Twenty calves and the colostrum from their respective dams were sampled, for which their were divided in two groups, primiparous (considering first and second calving cows) and multiparous (cows of ≥3 calving). The immunoglobulin concentration in milked colostrum from primiparous cows had a mean of 66.66 mg / ml, whereas the multiparous cows was 90 mg / ml, being statistically different (p = 0.04), wiyh respect to the colostrum that was supplied to the calves, no statistical significance was reported (p = 0.62). About the results blood serum time gelation, in both groups it produced in the range of 3 to 15 minutes, qualifying it as excellent, with a serum immunoglobulin concentration of> 12 mg / ml. A low negative Pearson correlation with no significance was obtained between the variables colostrum quality and gelation time. Regarding the post-calostrated evaluation, with respect to the initial weight if there was a significant difference between the means 32.54 Kg and 36.25 Kg for calves born from primiparous and multiparous cows respectively, while in the final weight (56 days) there was no significant difference with values of 56.81 Kg (primiparous) and 59.00 Kg (multiparous), the same behavior occurred with height; however, no value was found within the referential for that age, in addition, the calves showed a mean of physiological parameters within the normal ranges, and also, they presented diarrhea in 68.42% of the calves, which it could possibly be attributed to the management that is carried out on the farm in terms of dairy feeding and the method they use to supply the milk.