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Abstract
Mellado, M., Olivares, L., Rodriguez, A. and Mellado, J. 2006. Relation among blood profiles and goat diets on rangeland. J. Appl. Anim. Res., 30: 93–98.
In this study the hypothesis that botanical composition of goat diets are related to metabolites and mineral levels in blood serum was tested. Diet composition (microhistological analysis of fecal samples) was investigated among adult mixed-breed goats grazing on rangeland during the dry (n=20) and wet (n=20) periods. In the dry period levels of serum creatinine decreased with increasing proportions of Acacia farnesiana in goat diets. Serum levels of urea increased with the consumption of Parthenium incanum while goats consuming high levels of Larrea tridentata had decreased serum cholesterol level. Serum phosphorus showed a positive correlation with Atriplex canescens but a negative association with Buddleja scordioides. In the rainy season ascending levels of Croton dioicus in the diet were related to higher serum urea, Cu and Mg. Increased consumption of Buchloe dactyloides was positively related to serum urea and creatinine. The results of this study may help in evolving supplementary feeding strategies based on nutritional status of goats, particularly during the lean period.