Parâmetros hematológicos e bioquímicos de cabras lactantes alimentadas com dietas contendo glicerina bruta oriunda da produção de biodiesel proveniente de óleo de fritura

Abstract

RESUMO Objetivou-se analisar os efeitos da inclusão da glicerina bruta (GB), oriunda da produção de biodiesel proveniente de óleos residuais de fritura, sobre o consumo, e os parâmetros hematológicos e bioquímicos em cabras em lactação. Oito cabras com 42,06±3,5kg de peso corporal foram utilizadas, recebendo dietas contendo 0, 7, 14 e 21% de GB com base na MS total da dieta. O experimento foi conduzido em quadrado latino duplo 4×4, com duração de 80 dias, sendo quatro períodos de 20 dias, dos quais 15 para a adaptação e cinco para a coleta de dados. As amostras de sangue foram coletadas pela punção da veia jugular. Os consumos de MS, proteína bruta e matéria mineral decresceram linearmente, enquanto o de extrato etéreo aumentou quadraticamente. As concentrações do hematócrito, hemoglobina, hemácias e fósforo reduziram linearmente. Tendência quadrática foi observada para as concentrações séricas de cálcio. Não foram verificados efeitos para as concentrações de magnésio, glicose, colesterol total, triglicerídeos, proteínas plasmáticas totais, albumina, globulinas, ureia, creatinina, aspartato aminotransferase e fosfatase alcalina. Conclui-se que a GB pode ser utilizada em até 7% da MS total da dieta, sem promover problemas metabólicos.

Nutritive value of Saanen goat diets with dried distillers grains with solubles as a replacement for soybean meal

“…According to D' Angelino et al (1990), serum urea levels in goats may vary from 31.30 to 39.0 mg/dL. Santos et al (2018) verified variation from 36.12 to 40.08 mg/dL of serum urea in lactating goats that received protein diets. Thus, it is possible that the inclusion of DDGS in Saanen goat diets, from parturition to 120 d of lactation, did not affect the renal function of the animals (Braun et al, 2010).…”

Biochemical profile of castrated and uncastrated male goats supplemented with vitamin E or not

“…It was observed that the total protein content increased throughout the experiment, remaining within the reference values in the last two collections, mainly for noncastrated animals. In evaluating the biochemical profile of lactating goats fed diets containing 0, 7, 14 and 21% of crude glycerin from the production of biodiesel from frying oil, Santos et al (2018) found that the different crude glycerin percentages vin the diet did not affect the concentrations of total proteins. Serum albumin concentration was below the acceptable range for all treatments according to Raju et al (2015) (14.74 gL -1 ), and this can predict an indication of liver dysfunction, although there are other parameters such as aspartate aminotransferase (AST), alanine aminotransferase (ALP), alkaline and acid phosphatase that assertively investigate this dysfunction (Tripathi et al, 2008).…”

Fermentação e degradabilidade ruminal em ovinos alimentados com glicerina bruta oriunda da produção de biodiesel a partir de óleos de fritura

“…The differences found between studies regarding the inclusion of glycerin in the diet of ruminants are mainly a result of its composition, which is altered both by the method of obtaining it and the intrinsic effects of glycerol on ruminal and animal metabolism (Santos et al, 2018).…”

“…However, as the animals adapt to the diet, the rates of digestion and disappearance of glycerin in the rumen are maximized (Dias et al, 2016). The variation in CG composition is attributed to the facts that it is a byproduct and that there is no concern by the Brazilian industry to separate the remaining material (glycerol) from the reagents used in the production of biodiesel, which results in excess impurities in this compound (Santos et al, 2018).…”