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Centro de Investigaciones Biológicas del Noroeste (CIBNOR) 2012

Composición química de forrajes del agostadero y su relación con la composición química de leche de cabras criollas

Medina Córdova, Noé de Jesús

Titre : Composición química de forrajes del agostadero y su relación con la composición química de leche de cabras criollas

Auteur : Medina Córdova, Noé de Jesús

Etablissement de soutenance : Centro de Investigaciones Biológicas del Noroeste (CIBNOR)

Grade : Maestría en Ciencias en el Uso, Manejo y Preservación de los Recursos Naturales 2012

Résumé
For human consumption, the quality of any food is a function of nutrient input, as well as having beneficial health effects, so that milk is one of the most complete foods for humans. Goat’s milk as a substitute for traditional cow’s milk, is an important source of energy, high-quality protein, vitamins and minerals, and is a useful strategy to the problem of malnutrition, especially among children. Considering the operating systems for the goat production, one must know in detail the ability of native vegetation as forage species and their effect on physico-chemical characteristics of goat milk. The objective of this study was to determine the chemical composition of forage species associated with a semi-arid rangeland and its relationship to the chemical composition of goat milk in a native operating system extensively. The study was conducted at the ranch "El Bajio" located in the Ejido El Centenario, municipality of La Paz, Baja California Sur, with native goats under extensive production. During 12 months samples of plant species consumed by goats were collected, at the same period, samples of milk from 15 clinically healthy native goats fed on pasture under grazing conditions were collected. The results showed significant effect of seasonal changes of the year on the chemical composition of rangeland forage species in the area, being evident the presence of two distinct seasons, a good quality forage in autumn and winter and other lower-quality forage during spring and summer, both closely dependent on the rainy season. With the exception of crude fiber content, chemical composition of the milk of goats showed variation throughout the year in all variables assessed, which is likely due to changes in the chemical composition of rangeland forage species consumed by goats throughout the year. The spring season appears to be the most hostile of the year for goats, due to the water scarcity and food available, but there was a widespread use of cactus flowers and pods, which only appeared in this season, avoiding a decrease dramatically in the nutritional composition of the diet. Goats grazing freely selected and consumed a diet that was variable in the species composition of plants during the seasons.

Mots Clés : análisis proximal ; pastore extensivo ; especies forrajeras ; agostadero de zonas áridas

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Page publiée le 4 décembre 2017