Yeast as a feed additive for training horses

Abstract

This research analyses the yeast supplementation effect on the digestibility of nutrients and metabolic performance in training horses. Twelve horses were assigned into 2 groups: Pr (20 g of probiotics daily per horse) and control. The diet consisted of roughage (haylage) and commercial rations and all horses were trained for 6 weeks. LIPE ® indicator was used during 7 days and feces collected for five days to determine nutrient digestibility. DM, CP, DE, P, NDF, ADF, HCEL and lignin were determined. All horses were subjected to incremental ergospirometry test before and at the end of training. Horses that received live yeast showed an increase (p<0.05) of 4.1% in the digestibility of HCEL. After training, both horse groups presented higher tolerance to fatigue, with an increase in AT and VO2max. The training improved animal performance, hemicellulose digestibility and DE was higher in Pr, but these increases did not improve the performance of these animals.Index terms: Nutritional additives, equine, exercise, probiotics. RESUMOO trabalho avaliou o efeito da suplementação com leveduras na dieta de equinos em treinamento, sobre a digestibilidade dos nutrientes e o desempenho metabólico dos animais. Doze equinos foram distribuídos em 2 grupos: Pr (equinos que receberam 20 g de probióticos diariamente) e Controle. A dieta foi composta de volumoso (haylage) e concentrado comercial e todos os equinos foram treinados durante 6 semanas. A digestibilidade dos nutrientes foi avaliada utilizando o indicador LIPE ® (7 dias) e a coleta de fezes foi realizada durante cinco dias. Foi analisado MS, PB, DE, P, FDN, FDA, HCEL e lignina. Antes e após o treinamento, todos os cavalos foram submetidos a um teste incremental ergoespirométrico. Os equinos que receberam leveduras vivas apresentaram um aumento (p <0,05) de 4,1% na digestibilidade da HCEL. Após o treinamento, ambos os grupos apresentaram maior tolerância à fadiga, com um aumento na AT e no VO2max. O treinamento melhorou o desempenho dos animais, e a digestibilidade da hemicelulose e DE foi maior no grupo Pr, mas esses aumentos não melhoraram o desempenho desses animais.Termos para indexação: Aditivos nutricionais, equino, exercício, probióticos.

Effects of supplementation with Saccharomyces cerevisiae and aerobic training on physical performance of Mangalarga Marchador mares

“…However, differences (P<0.05) were found between the maximal-effort physical tests for time-to-fatigue, aerobic and anaerobic thresholds, SLa 2 , SLa 4 , and S 200 (Table 1). Rezende et al (2012) did not observe effects of daily supplementation with 20 g probiotics on physical performance of Andalusian horses subjected to six weeks of training.…”

“…According to Rezende et al (2012), different responses observed in studies using probiotics in horses may be due to differences in the amount of live yeast supplement given to the animals, as there are no studies suggesting the ideal dose to be used.…”

“…The use of probiotics aiming to improve animal health has become routine, while research has shown their benefits in the better absorption of equine diets (Moura et al, 2009;Moura et al, 2011;and Rezende et al, 2012). These authors justify the benefits of adding probiotics to equine diets to their effect on the fermenting activity and the stabilization of the cecum-colon microbiota, which potentiates nutrient absorption.…”

Probiotic yeasts in livestock sector

“…Sudden shift in diets or highly fermentable sugar or starch rich diets disturb the microbial balance due to low digestibility of plant cell wall carbohydrates by the horses as compared to the ruminants. In horses the digestive system has a comparatively faster rate of passage leaving the microflora of the large intestine with less time to carry out fermentation, and this leads to accumulation of lactate and reduction in pH leading to subclinical acidosis in the caecum-colon, consequently increasing the horses' susceptibility to colic pain or laminitis (Kronfeld and Harris, 1997;Hudson et al, 2001;Respondek et al, 2007;Jouany et al, 2008;de Rezende et al, 2012). Therefore, it is important to overcome these intestinal disorders to maintain healthy gut flora.…”

“…Therefore, it is important to overcome these intestinal disorders to maintain healthy gut flora. Many strategies have been adopted for this purpose and one such strategy is the addition of probiotic yeast or live yeast in horses' diet to improve diet assimilation and to encourage horses' growth and performance (Julliand et al, 2006;Moura et al, 2009;Moura, 2011;de Rezende et al, 2012). According to Chaucheyras-Durand and Durand (2010) probiotic supplementation needs to fulfill certain targets in the horse to be beneficial such as, to limit stress and improve hindgut fermentation, milk quality and quantity.…”