scholarly journals Effect of dietary supplementation with live-cell yeast at two dosages on lactation performance, ruminal fermentation, and total-tract nutrient digestibility in dairy cows

2012 ◽  
Vol 95 (7) ◽  
pp. 4017-4028 ◽  
Author(s):  
L.F. Ferraretto ◽  
R.D. Shaver ◽  
S.J. Bertics
Keyword(s):  
Dairy Cows ◽  
Dietary Supplementation ◽  
Nutrient Digestibility ◽  
Live Cell ◽  
Ruminal Fermentation ◽  
Lactation Performance

scholarly journals Effects of Dietary Alkyl Polyglycoside Supplementation on Lactation Performance, Blood Parameters and Nutrient Digestibility in Dairy Cows

Animals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 549
Author(s):  
Xiaoli Zhang ◽  
Chunyu Jiang ◽  
Qinghua Gao ◽  
Duanqin Wu ◽  
Shaoxun Tang ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Dry Matter ◽  
Basal Diet ◽  
Nutrient Digestibility ◽  
Blood Metabolites ◽  
Ionic Surfactant ◽  
Lactation Performance ◽  
Positive Effects ◽  
Alkyl Polyglycoside

This study evaluated the effects of alkyl polyglycoside (APG), which is a non-ionic surfactant, on lactation performance, nutrient digestibility and blood metabolites in dairy cows. Twenty dairy cows were randomly divided into four groups and fed a basal diet that included pelleted concentrate, distillers grains, and fresh limpograss. The four treatments included 0, 5.5, 11 and 22 mL APG per kg of pelleted concentrate on a dry matter basis; treatments were defined as APG0, APG5.5, APG11, and APG22, respectively. Dry matter intake was not affected by APG supplementation. There was an increase in milk yield (from 13.96 to 16.71 kg/day) and increases in milk fat (quadratic, p = 0.04), protein (quadratic, p = 0.10), and lactose concentrations (linear, p = 0.07) with increasing APG supplementation. In addition, APG supplementation increased (p ≤ 0.03) the milk fat, protein, solid non-fat, and total solid yields, while the lactose yield increased (linear, p = 0.01) as the APG level increased. Dietary APG supplementation had no effect on nutrient digestibility and blood metabolites. It was concluded that the addition of APG at doses up to 22 mL/kg of pelleted concentrate had positive effects on the milk composition in dairy cows.

Effects of copper sulphate and coated copper sulphate addition on lactation performance, nutrient digestibility, ruminal fermentation and blood metabolites in dairy cows

2020 ◽  
pp. 1-9
Author(s):  
C. Wang ◽  
L. Han ◽  
G. W. Zhang ◽  
H. S. Du ◽  
Z. Z. Wu ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Copper Sulphate ◽  
Milk Fat ◽  
Block Design ◽  
Nutrient Digestibility ◽  
Cellulolytic Enzyme ◽  
Ruminal Fermentation ◽  
Cellulolytic Bacteria ◽  
Nutrient Digestion ◽  
Milk Performance

Abstract Coated copper sulphate (CCS) could be used as a Cu supplement in cows. To investigate the influences of copper sulphate (CS) and CCS on milk performance, nutrient digestion and rumen fermentation, fifty Holstein dairy cows were arranged in a randomised block design to five groups: control, CS addition (7·5 mg Cu/kg DM from CS) or CCS addition (5, 7·5 and 10 mg Cu/kg DM from CCS, respectively). When comparing Cu source at equal inclusion rates (7·5 mg/kg DM), cows receiving CCS addition had higher yields of fat-corrected milk, milk fat and protein; digestibility of DM, organic matter (OM) and neutral-detergent fibre (NDF); ruminal total volatile fatty acid (VFA) concentration; activities of carboxymethyl cellulase, cellobiase, pectinase and α-amylase; populations of Ruminococcus albus, Ruminococcus flavefaciens and Fibrobacter succinogenes; and liver Cu content than cows receiving CS addition. Increasing CCS addition, DM intake was unchanged, yields of milk, milk fat and protein; feed efficiency; digestibility of DM, OM, NDF and acid-detergent fibre; ruminal total VFA concentration; acetate:propionate ratio; activity of cellulolytic enzyme; populations of total bacteria, protozoa and dominant cellulolytic bacteria; and concentrations of Cu in serum and liver increased linearly, but ruminal propionate percentage, ammonia-N concentration, α-amylase activity and populations of Prevotella ruminicola and Ruminobacter amylophilus decreased linearly. The results indicated that supplement of CS could be substituted with CCS and addition of CCS improved milk performance and nutrient digestion in dairy cows.

scholarly journals In vitro evaluation of Lactobacillus plantarum as direct-fed microbials in high-producing dairy cows diets

2019 ◽  
Vol 4 (1) ◽  
pp. 214-228 ◽  
Author(s):  
Hugo F Monteiro ◽  
Ana Laura J Lelis ◽  
Virginia L N Brandao ◽  
Andressa Faccenda ◽  
Andre S Avila ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Lactobacillus Plantarum ◽  
Lactate Concentration ◽  
Nutrient Digestibility ◽  
Co2 Production ◽  
Yeast Fermentation ◽  
Ruminal Fermentation ◽  
N Concentration ◽  
N Metabolism

Abstract The objectives of this study were: 1) to compare the effects of live yeast (LY), yeast fermentation product (YFP), a mix of Lactobacillus acidophilus and Propionibacterium freudenreichii (MLP), and Lactobacillus plantarum included as additives in dairy cows’ diets on in vitro ruminal fermentation and gas production (GP); and 2) to evaluate the effects of L. plantarum as direct-fed microbials (DFM) in dairy cows’ diets on in vitro ruminal fermentation, GP, nutrient digestibility, and N metabolism. Three experiments were carried out: Exp. 1 had the objective to compare all additives regarding ruminal fermentation parameters: an Ankom GP system was used in a completely randomized design, consisting of four 48 h incubations, and eight replications per treatment. There were eight treatments: a basal diet without additive (CTRL) or with one of the following additives: LY, YFP, MLP, or L. plantarum at four levels (% of diet Dry Matter (DM)): 0.05% (L1), 0.10% (L2), 0.15% (L3), and 0.20% (L4). In Exp. 2, a batch culture was used to evaluate ruminal fermentation, and CO2 and CH4 production using the same treatments and a similar experimental design, except for having 16 replications per treatment. Based on Exp. 1 and 2 results, Exp. 3 aimed at evaluating the effects of the L. plantarum on ruminal true nutrient digestibility and N utilization in order to evaluate the use of L. plantarum as DFM. The treatments CTRL, MLP, L1, and L2 were used in a replicated 4 × 4 Latin square design using a dual-flow continuous culture system. Data were analyzed using linear and nonlinear regression; treatment means were compared through contrasts, and L treatments in Exp. 1 and 2 were tested for linear, quadratic, and cubic effects. In Exp. 1, all treatments containing additives tended to reduce OM digestibility as well as reduced total volatile fatty acids (VFA) concentration and total GP. The YFP had greater OM digestibility than LY, and MLP treatment had greater total VFA concentration compared to L. plantarum treatments. In Exp. 2, additives reduced CO2 production, and there were no major differences in CH4. In Exp. 3, all additives reduced NH3-N concentration. In conclusion, pH and lactate concentration were not affected in all three experiments regardless of additive tested, suggesting that these additives may not improve ruminal fermentation by pH modulation; and L. plantarum may improve ruminal N metabolism when used as DFM in high-producing dairy cows’ diets, mainly by reducing NH3-N concentration.

Increasing dietary doses of an Aspergillus oryzae extract with alpha-amylase activity on nutrient digestibility and ruminal fermentation of lactating dairy cows

2017 ◽  
Vol 228 ◽  
pp. 159-167 ◽  
Author(s):  
Caio S. Takiya ◽  
Gustavo D. Calomeni ◽  
Thiago Henrique Silva ◽  
Thiago Henrique A. Vendramini ◽  
Guilherme G. Silva ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Aspergillus Oryzae ◽  
Amylase Activity ◽  
Nutrient Digestibility ◽  
Alpha Amylase ◽  
Ruminal Fermentation ◽  
Lactating Dairy Cows
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