Strains of live Saccharomyces cerevisiae yeast have exhibited probiotic effects in ruminants. This study investigated the effects of the dietary yeast supplement, S. cerevisiae(Yea-Sacc^(1026)), on primiparous(PP)and ...Strains of live Saccharomyces cerevisiae yeast have exhibited probiotic effects in ruminants. This study investigated the effects of the dietary yeast supplement, S. cerevisiae(Yea-Sacc^(1026)), on primiparous(PP)and multiparous(MP) Egyptian buffaloes in early to mid-lactation. Lactating buffaloes were fed either a basal total mixed ration(TMR, control; 4 PP and 8 MP) or the basal TMR plus 10 g Yea-Sacc^(1026) per buffalo cow per day(yeast; 4 PP and 8 MP). The feeds were given from 15 days prepartum to 180 days postpartum. Feed intake, body weight, and milk yields(MY) were recorded, and milk and blood samples were collected for analyses. Feces were collected from days 45 to 47 during early lactation and from days 90 to92 during mid-lactation to determine apparent digestibility of dry matter(DM), organic matter(OM),crude protein(CP) and crude fiber(CF). Energy corrected milk yield(ECM), feed conversion, and energy and nitrogen conversion efficiency were calculated. Yeast treated MP buffaloes consumed more DM(P < 0.041) and CP than the untreated control group. Apparent digestibility of DM and OM were significantly greater at mid-lactation for treated versus control group(P = 0.001). Crude fiber digestibility was greater in MP than in PP buffaloes(P = 0.049), and yeast supplemented MP cows had a greater CF digestibility than control MP buffaloes at mid-lactation(P = 0.010). Total blood lipids decreased after yeast supplementation(P= 0.029). Milk yields, ECM, fat and protein yields increased for yeast treated MP buffaloes(P < 0.039). The study concluded that the response to yeast supplementation in buffalo cows is parity dependent. Multiparous buffaloes respond to yeast supplementation with an increased DM intake and CF digestibility without significant weight gains, allowing a greater ECM yield with less fat mobilization. Supplementing buffaloes with yeast culture may increase milk production in early lactation and results in a more persistent milk production during mid-lactation. Feed conversion and energy and nitr展开更多
[ Objective] This study aimed to screen yeast strains suitable for high temperature processing of formulated biological feed. [ Method ] High temperature resistance and culture conditions of six yeast strains were inv...[ Objective] This study aimed to screen yeast strains suitable for high temperature processing of formulated biological feed. [ Method ] High temperature resistance and culture conditions of six yeast strains were investigated. [Result] Two yeast strains resistant to high temperature （45 ℃ ） with high viable cell number （10^8 cells/ml） were screened, including DQFC2117-1 and DQFC2122-2. [ Conclusion] Strains DQFC2117-1 and DQFC2122-2 could be used as high temperature resistant yeast strains for processing of formulated biological feed.展开更多
基金Ain Shams University, Faculty of Agriculture for funding of this research work
文摘Strains of live Saccharomyces cerevisiae yeast have exhibited probiotic effects in ruminants. This study investigated the effects of the dietary yeast supplement, S. cerevisiae(Yea-Sacc^(1026)), on primiparous(PP)and multiparous(MP) Egyptian buffaloes in early to mid-lactation. Lactating buffaloes were fed either a basal total mixed ration(TMR, control; 4 PP and 8 MP) or the basal TMR plus 10 g Yea-Sacc^(1026) per buffalo cow per day(yeast; 4 PP and 8 MP). The feeds were given from 15 days prepartum to 180 days postpartum. Feed intake, body weight, and milk yields(MY) were recorded, and milk and blood samples were collected for analyses. Feces were collected from days 45 to 47 during early lactation and from days 90 to92 during mid-lactation to determine apparent digestibility of dry matter(DM), organic matter(OM),crude protein(CP) and crude fiber(CF). Energy corrected milk yield(ECM), feed conversion, and energy and nitrogen conversion efficiency were calculated. Yeast treated MP buffaloes consumed more DM(P < 0.041) and CP than the untreated control group. Apparent digestibility of DM and OM were significantly greater at mid-lactation for treated versus control group(P = 0.001). Crude fiber digestibility was greater in MP than in PP buffaloes(P = 0.049), and yeast supplemented MP cows had a greater CF digestibility than control MP buffaloes at mid-lactation(P = 0.010). Total blood lipids decreased after yeast supplementation(P= 0.029). Milk yields, ECM, fat and protein yields increased for yeast treated MP buffaloes(P < 0.039). The study concluded that the response to yeast supplementation in buffalo cows is parity dependent. Multiparous buffaloes respond to yeast supplementation with an increased DM intake and CF digestibility without significant weight gains, allowing a greater ECM yield with less fat mobilization. Supplementing buffaloes with yeast culture may increase milk production in early lactation and results in a more persistent milk production during mid-lactation. Feed conversion and energy and nitr
基金Supported by Special Fund for Basic and Applied Research from the Finance Department of Heilongjiang Province
文摘[ Objective] This study aimed to screen yeast strains suitable for high temperature processing of formulated biological feed. [ Method ] High temperature resistance and culture conditions of six yeast strains were investigated. [Result] Two yeast strains resistant to high temperature （45 ℃ ） with high viable cell number （10^8 cells/ml） were screened, including DQFC2117-1 and DQFC2122-2. [ Conclusion] Strains DQFC2117-1 and DQFC2122-2 could be used as high temperature resistant yeast strains for processing of formulated biological feed.
