Relación de la variabilidad lipídica de la leche producida en los sistemas de producción interandinos con los ecosistemas del austro ecuatorianos

Abstract

VIII.Abstract The present study was carried out to relate the lipid variability of the milk produced with the ecosystems of semi-intensive production systems of the Ecuadorian Austro Inter-Andean; the same was done with the collection of 600 homogenized samples from 150 typical cattle ranches of Cañar and Azuay, for which a selection study of the same was carried out. The animals of Holstein Criollo lines are fed on predominant pastures of the area: Kikuyu and Raygrass plus supplement, which was also quantified. The ecosystems were classified based on 20 variables of bioclimate, geoforms, and geo climate; and the fat percentage was obtained for each sample. Chi2 tests were used to determine the qualitative relationship of the fraction with the independent variables, and for the quantitative relationship, a variance was determined with one-way ANOVA and Spearman's correlation. Significant relationships were found between the range of landscape type, rainy weather, and time of year with lipid quality, concluding that in addition to the factors that traditionally affect milk composition, genetics, and nutrition, environmental factors also modify it. These results allow us to affirm that there is an environmental effect on the composition of milk and that studying it in depth through the specific composition of nutrients can be a factor of qualitative differentiation of milk. It is also necessary to study in-depth how changes in ecosystems also affect other variables of livestock production. Keywords: dairy cattle, fat, ecosystems, production systems