Effect of Yeast Culture on Nutrient Digestibility and Milk Yield Response in Early- to Midlactation Dairy Cows

Abstract

Twenty Holstein dairy cows in early lactation were allocated equally to one of two treatments on the basis of age, days in milk, and mean daily 2-wk pretrial milk yield. All animals were fed a total mixed ration; the ration for the treatment group was top-dressed with 90 g/d of yeast culture, Saccharomyces cerevisiae. Treatment period lasted 10 wk. Mean daily DM intake, milk production, milk composition, and BW were not significantly affected by treatment. Feed and fecal samples were collected the last 3 d of the treatment period to determine apparent total tract nutrient digestibility using ADF insoluble ash as the inert marker. No significant differences in digestibility were observed between treatment groups for CP, ADF, and NDF.

Effect of Prilled Fat and Yeast Supplementation on Milk Production, Fatty Acid Profile and Economics of Feeding in Murrah Buffaloes (Bubalus bubalis)

“…Similarly the enhancement in fat yield was also observed by researches (Moallem et al, 2012Putnam et al, 1997. Arambel and Kent, (1990) attributed ADF in the ration while maintained milk fat synthesis. Similarly some studies have shown that yeast culture had no beneficial effect on milk composition of dairy cows (Arambel and Kent, 1990;Bagheri et al, 2009;Soder et al, 1999;Swartz et al, 1994), but in lactating goats fed live yeast, a reduction in milk fat (Stella et al, 2007) or increase (Giger-Reverdin et al, 1996) have observed.…”

“…Prilled fat feeding during periparturient period and early lactation increased milk yield and milk fat contents in cows (Yadav et al, 2015) and Murrah buffaloes (Shikha et al, 2016) However, some researchers (Arambel et al, 1990) Robinson et al, 1999: Bagheri et al, 2009 reported no beneficial effects of yeast feeding on milk production performance. The increase in fat percentage in the SG group was due to more availability of FAs in blood and their incorporation into milk fat in mammary gland (Shelke et al, 2012).…”

Effects of direct-fed microbials and their combinations with yeast culture on <i>in vitro</i> rumen fermentation characteristics

“…In case none of these DFM survives in the rumen, then their lysis would provide protoplasm, which is a source of nutrients for the rumen microbes (Arambel and Kent, 1990). It is therefore hypothesized that Bl and Cb alone may not directly affect fibre digestibility, but may indirectly stimulate cellulolytic microbes in the rumen through cross-feeding mechanisms.…”

“…Yeast culture may also provide stimulatory factors for cellulolytic bacteria, such as B vitamins or branched-chain fatty acids (Weidmeier et al, 1987). On lysis, the yeast cells also provide protoplasm, which is a source of nutrition for the rumen microbes (Arambel and Kent, 1990).…”

The influence of probiotic additives or multienzyme composition on blood biochemical parameters and milk quality of Lithuanian Black-and-White cattle

“…According to the Szucs et al (2013) the best yield was reached by the treated primiparous cows but no important difference was found between the daily yield of treated and control multiparous cows. Arambel and Kent (1990) found a little or no response to yeast cultures for the milk yield and milk composition. While others report opposite findings -milk yield decreases in supplementation with live yeast (Bertrand and Grimes, 1997;Schwartz et al, 1994).…”