083 Effects of yeast-derived rumen escape microbial protein on lactational performance and metabolic status of transition dairy cows

Higginson, V.; Baurhoo, B.; Schuermann, Yasmin; Taibi, Mahmoud; St-Yves, A.; Duggavathi, Raj; Mustafa, A. F.

doi:10.2527/asasmw.2017.083

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“…Neal et al (2014) reported a tendency for increased milk production when adding 1.15% of the diet DM as yeast microbial protein. In addition, Higginson et al (2017) reported improved metabolic status (e.g., reduced metabolic stress and adipose tissue mobilization) in transition cows during the postpartum period when fed yeast-derived microbial protein. However, Manthey et al (2016) reported reduced feed efficiency (energy-corrected milk per kilogram of DMI) and milk fat yield for cows fed 2.25% of diet DM as yeast-derived microbial protein.…”

Section: Introductionmentioning

confidence: 99%

Cyberlindnera jadinii yeast as a protein source in early- to mid-lactation dairy cow diets: Effects on feed intake, ruminal fermentation, and milk production

Kidane

Vhile

Ferneborg

et al. 2022

Journal of Dairy Science

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We examined the effects of substituting soybean meal with either yeast protein from Cyberlindnera jadinii or barley in concentrate feeds on feed intake, ruminal fermentation products, milk production, and milk composition in Norwegian Red (NRF) dairy cows. The concentrate feeds were prepared in pellet form as soy-based (SBM; where soybean meal is included as a protein ingredient), yeast-based (YEA; soybean meal replaced with yeast protein), or barley-based (BAR; soybean meal replaced with barley). The SBM contained 7.0% soybean meal on a dry matter (DM) basis. This was replaced with yeast protein and barley in the YEA and BAR concentrate feeds, respectively. A total of 48 early-to mid-lactation [days in milk ± standard deviation (SD): 103 ± 33.5 d] NRF cows in their first to fourth parity and with initial milk yield of 32.6 kg (SD = 7.7) were allocated into 3 groups, using a randomized block design, after feeding a common diet [SBM and good-quality grass silage: crude protein (CP) and neutral detergent fiber (NDF) content of 181 and 532 g/ kg of DM, respectively] for 14 d (i.e., covariate period). The groups (n = 16) were then fed one of the dietary treatments (SBM, YEA, or BAR) for a period of 56 d (i.e., experimental period). The concentrate feeds were offered in split portions from 3 automatic feeders using electronic identification, with ad libitum access to the same grass silage. Dietary treatments had no effect on daily silage intake, total DM intake, or total NDF intake. Dietary CP intake was lower and starch intake was higher in the BAR group compared with the other groups. Ruminal fluid pH, short-chain volatile fatty acid (VFA) concentrations, acetate-to-propionate ratio, and non-glucogenic to glucogenic VFA ratio were not affected by dietary treatments. No effects of the dietary treatments were observed on body weight change, body condition score change, milk yield, energy-corrected milk yield, milk lactose and fat percentages, or their yields. In conclusion, yeast protein can substitute conventional soybean meal in dairy cow diets without adverse effect on milk production and milk composition, given free access to good-quality grass silage.

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Section: Introductionmentioning

confidence: 99%