Online Event
September 12-13, 2022 | Online Event
FAT 2022

Supplementation with galacto-oligosaccharides in early life persistently facilitates the microbial colonization of the rumen and promotes growth of preweaning holstein dairy calves

Peng Sun, Speaker at Food Science Congress
Institute of Animal Science, Chinese Academy of Agricultural Sciences, China
Title : Supplementation with galacto-oligosaccharides in early life persistently facilitates the microbial colonization of the rumen and promotes growth of preweaning holstein dairy calves

Abstract:

We aimed to determine the effects of dietary supplementation with galacto-oligosaccharides (GOS) on the growth performance, serum parameters, and the rumen microbial colonization and fermentation of pre-weaning dairy calves. The study comprised two phases of 28 days and 42 days, respectively. During phase 1, 24 newborn female Holstein dairy calves were randomly allocated to consume a diet supplemented with 10 g/d GOS (GOS, n = 12) or not (CON, n = 12). Thereafter, during phase 2, the GOS group was further divided into two groups: one that continued to consume GOS (GOSC, n = 6) and one that no longer consumed GOS (GOSS, n = 6), alongside the CON group. Galacto-oligosaccharides increased the average daily gain (ADG), body weight, feed efficiency, and serum high-density lipoprotein-cholesterol concentration of dairy calves during phase 1 (P < 0.05). Supplementation with GOS for the entire study reduced the incidence of diarrhea and increased the serum total protein and Ca concentrations (P < 0.05) compared with the CON group. The effect of GOS supplementation persisted after it was stopped because the ADG and final body weight of the GOSS group were higher than those of the CON group (P < 0.05). Furthermore, the GOSS group showed a persistently lower incidence of diarrhea and greater colonization of the rumen with probiotics, at the expense of less beneficial bacteria, which would promote ruminal fermentation and microbial protein synthesis. These findings provide a theoretical basis for the rational application of prebiotics and have important practical implications for the design of early life dietary interventions in dairy calf rearing.

Biography:

Dr. Sun studied Animal Nutrition and Feed Science at the Jilin Agricultural University, Changchun and graduated as MS in 2005. She then joined the research group of Prof. Defa Li at the Ministry of Agriculture Feed Industry Center (MAFIC), China Agricultural University. She received her PhD degree in 2008 at the same institution. She worked at the Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China. She obtained the position of a Professor at the CAAS. She has published more than 30 research articles in SCI(E) journals.

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