Effects of adding a mixture of malate and yeast culture (Saccharomyces cerevisiae) on milk production of Murciano-Granadina dairy goats

Abstract

-Twenty-four Murciano-Granadina dairy goats were used to investigate the effects of supplementation with a mixture of malate and yeast (Saccharomyces cerevisiae) on milk production. The goats were machine milked once a day after parturition and were assigned to two balanced groups on week 4 of lactation. The experimental groups were kept separately in pens and were fed a daily diet based on a dehydrated forage mixture (alfalfa hay: maize whole plant, 1:1) ad libitum, 0.3 kg alfalfa pellets and 0.2 kg barley grain. The basal diet was completed with 0.6 kg concentrate pellets fed individually. Two different dietary treatments were randomly assigned to each goat group: control (without supplementation) and supplemented (with a mixture of malate and yeast included in the concentrate at a level of 10 g·kg -1 ). Feed intake, milk yield, milk composition and body weight were evaluated from week 4 to 16 of lactation. Malate content of the control and supplemented concentrate was 2.4 and 6.0 g·kg -1 DM, respectively. Supplementation with the malate and yeast culture mixture did not affect (P > 0.05) feed intake (2.04 vs. 2.03 kg DM·d -1 ), milk yield (2.09 vs. 2.08 L·d -1 ), milk fat (5.17 vs. 4.85%), milk protein (3.70 vs. 3.63%) or milk casein (2.57 vs. 2.51%) for the control vs. the supplemented goats, respectively. Nevertheless, the supplemented goats gained more body weight than the control goats (39 vs. 19 g·d -1 ; P < 0.05). We conclude that supplementation with the mixture of malate and yeast culture, under the conditions of our experiment, had no beneficial effects on the performance of dairy goats. The relatively high contents of malic acid in the forage mixture (7.3 g·kg -1 DM) and in the alfalfa pellets (14.2 g·kg -1 DM) may have decreased the response to malate in the supplemented diet. sur la production laitière chez la chèvre Murciano-Granadina. Vingt-quatre chèvres laitières Murciano-Granadina ont été utilisées pour étudier les effets de la supplémentation d'un mélange de malate et de levure (Saccharomyces cerevisiae) sur la production du lait. Les chèvres étaient traites à la machine, une fois par jour, dès la mise bas et ont été réparties dans deux groupes équilibrés à partir de la quatrième semaine de lactation. Les lots expérimentaux ont été logés séparément et la ration de base journalière était constituée d'un mélange de fourrages déshydratés (foin de luzerne:maïs plante entière, 1:1) distribué ad libitum, 0,3 kg de pellets de foin de luzerne déshydratée et 0,2 kg d'orge en grain. La ration de base a été enrichie par 0,6 kg de concentré d'une façon individuelle. Deux traitements différents ont été appliqués aléatoirement à chaque groupe de chèvres : régime témoin (sans supplément) et régime supplémenté (avec mélange de malate et de levure inclus dans le concentré à un niveau de 10 g·kg -1 ). L'ingestion, la production de lait, la composition du lait et le poids vif ont été évalués de la 4 e à la 16 e semaine de lactation. Les concentrations en malate dans le concentré témoin et supplémenté ...

Effect of DL-malic acid supplementation on feed intake, methane emission, and rumen fermentation in beef cattle

“…In agreement with our study, some authors have reported reductions in feed intake (Wallace et al, 2006;Molano et al, 2008). However, other authors have found no effect on intake (Kung et al, 1982;Martin et al, 1999;Montano et al, 1999;Salama et al, 2002;Carro et al, 2006, McCourt et al, 2008. It should be noted that in the case of McCourt et al (2008), who offered up to 11% of DMI as FA, the FA was encapsulated.…”

Characterization of Haemorrhagic Enteritis in Dairy Goats and the Effectiveness of Probiotic and Prebiotic Applications in Alleviating Morbidity and Production Losses

“…Goats supplemented with yeast probiotics show improvements in milk production but the results are quite variable [15][16][17][18][19][20]. These studies indicated that stronger responses to prebiotic or probiotic treatments were achieved with animals that were challenged by multiple factors such as heat [45] and feed quality [17].…”

“…In monogastric livestock, probiotic and prebiotic feed additives mitigate pathogen issues in a number of ways including establishing beneficial bacteria in the intestinal tract [8,9], improving the ability of the mucosa to withstand infection [10,11,12], improving the defense system [8,9], binding toxins [3,4,13] and interfering with pathogen colonization sites [3,4,14]. Probiotics can improve milk production and rumen function in goats [15][16][17][18][19][20][21] with a 280-head commercial dairy herd were used in the study. The goats were housed in an open stall barn with ventilation and had continuous access to water.…”

Effects of supplementing malate and yeast culture (<i>Saccharomyces cerevisiae</i>) on the rumen enzyme profile and growth performance of lambs

“…The persistence of milk yield after the peak of lactation was greater in cows receiving a yeast supplement than in the cows of the control group (Strzetelski et al, 1996). However, the results on the use of S. cerevisiae in dairy cows (Dann et al, 2000) and dairy goats (Salama et al, 2002) are also contradictory. Dietary factors such as forage-toconcentrate ratio and forage type are important in determining the response to malate and yeast culture supplementation (Piva et al, 1993), which may explain the contradiction found in the results of the previous studies.…”