Effect of Lactic Acid Bacteria Inoculants on In Vitro Digestibility of Wheat and Corn Silages

Abstract

The aim of the study was to determine the effect of 10 sources of lactic acid bacteria (LAB) on dry matter digestibility (DM-D) and neutral detergent fiber digestibility (NDF-D), in various combinations with starch, in vitro. The soluble starch represented a concentrate feed, whereas silage represented feeding only roughage. The DM-D and NDF-D were determined after 24 and 48 h of incubation to represent effective (24 h) and potential (48 h) digestibility. Addition of LAB was both by direct application of the inoculants to rumen fluid (directly fed microbials) and by the use of preinoculated silages. For each feed combination, tubes without added LAB served as controls. The results indicate that, overall, some LAB inoculants applied at ensiling or added directly to the rumen fluid had the potential to increase the DM-D and NDF-D. The major significant inoculant effect on NDF-D was obtained after 24 h of incubation, whereas the effect after 48 h was mainly nonsignificant. The effective inoculants seemed to minimize the inhibitory effect of the starch on NDF-D within 24 h, perhaps by competition with lactate-producing rumen microorganisms.

Impact of a mixed culture of Lactobacillus casei and L. lactis on in vitro ruminal fermentation and the growth of feedlot steers fed barley-based diets

“…Furthermore, the fact that the DFM influenced gas production and DMD differently during fermentation of the backgrounding and finishing diets coupled with the similar microbial N production from both diets suggests that the DFM did not affect the overall microbial activity, but it may have altered the proportions of specific microbial sub-populations. This reasoning is also consistent with the general mode of action and the role of Lactobacillus species in direct-fed microbial products Lee and Seo 2005;Weinberg et al 2007). …”

“…However, the practice of supplementing animal diets with DFM was originally based on the concept of delivering beneficial microorganisms to stressed animals with the expectation that the beneficial microorganisms would thrive in the gastrointestinal tract and prevent the establishment of pathogens (Weinberg et al 2007). It is therefore not surprising that most studies reporting positive effects of feeding DFM products have been conducted under conditions where the potential for stress has been high, including weaning and transporting of calves and steers (Schwab et al 1980;Jenny et al 1991).…”

Intake and Digestibility of Silages

“…Probiotics is a live microorganism in the food supplement that beneicially afects the host animal by improving intestinal balance [37]. One hypothesis is that speciic strains of LAB interact with microorganisms of the rumen improving their function and animal performance [38][39][40].…”

Biochemical and molecular identification of lactic acid bacteria isolated from camel milk in Tunisia

“…The dominant and beneficial microflora in camel milk represented by LAB is a potential source of biological materials to be used in dairy technology (Khedid et al, 2009). LAB strains are characterized by their ability to transform lactose, to improve the digestibility (Weinberg et al, 2007) and to preserve fermented dairy products (Abdelbasset and Djamila, 2008). They were also employed for improvement of the taste, texture and viscosity in the manufacture of dairy products (Soukoulis et al, 2007).…”