Influência do manejo nutricional na relação Ca:P em fêmeas caprinas (Capra hircus) da raça Saanen

Abstract

Goats have very great importance in dairy production. In most states in the northeast of Brazil, the goat is characterized as the only exploration activity by small farmers, constituting themselves as a source of income and as a subsistence activity. Minerals play essential roles both in humans and animals health. Among the important macroelements, calcium (Ca) and phosphorus (P) are the most abundant minerals in the animal organism. Calcium and phosphorus work in synergy. If levels of these minerals are not sufficient to supply the physiological processes of the animal, all mechanisms that involve participation of these minerals will be affected, bringing harm to animal health. The objective of this research was to evaluate the influence of nutritional management in the Ca: P ratio of females in a herd of goats Saanen, in the metropolitan area of Recife city, due to the importance of the various methods of creating and fault management practiced by farmers. The study was done with 34 Saanen goat does, divided into three groups according to age or diet offered at the farm. One group had 13 young females - GJ13, and another 14 adult females - GA14, and a third group had seven adult females with different treatments (different diets offered by the farmer to these goats) - GA7. The study was led for nine months, by clinical, radiographic and laboratory tests including hematology and serum biochemical analysis for calcium and phosphorus and feed bromatologic analysis. In the analysis of the data, absolute distributions were gotten and statistical measures: mean, median and standard deviation and statistical tests were used: t-test with equal or unequal variance and Fisher's Exact test when the conditions for using the chi-square unverified. Statistical tests were performed with an error margin of 5.0%. According the study observations, and interpretation of statistical analysis, it was concluded that in the herd studied several factors affect negatively to the imbalance of Ca: P. Among them, that it is unwise make changes in animal diet, prior to performing chemical analyzes and minerals to assess nutritional requirements according to the physiological state of animals.