Changes in fermentation and biohydrogenation intermediates in continuous cultures fed low and high levels of fat with increasing rates of starch degradability

Lascano, G.J.; Alende, M.; Koch, L. E.; Jenkins, T.C.

doi:10.3168/jds.2016-11032

Cited by 30 publications

(39 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We did not assess the endosperm texture and the degree of grain processing (factors that affect the availability of starch to the animal), but the high concentration of starch stimulates the production of microbial protein in the rumen, increasing the production and concentration of milk protein Lascano et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Nutritive value of corn silage from intensive dairy farms in Brazil

et al. 2017

View full text Add to dashboard Cite

-The objective of this research was to characterize the nutritive value of corn silage made on intensive dairy farms and demonstrate the nutritional variations between silages located at the top and at the center of a bunker silo. Thirty-two dairy farms were visited in four Brazilian states. One corn bunker silo of each farm was chosen and samples were collected from the top and center parts. The nutritive value, fermentation end-products, and microbial counts were assessed. The predicted milk was determined by Milk2006 spreadsheet. The mean, standard deviation, maximum, minimum, and 95% confidence interval of all data were calculated. The ash, neutral detergent fiber (NDF), starch, in vitro NDF, and dry matter (DM) digestibility data were compared with reference value. Both statistical procedures were performed through the PROC MEANS of SAS. The mean values found at the center for NDF, starch, total digestible nutrients (TDN -1x ), and estimated milk were 503 g kg −1 DM, 308 g kg −1 DM, 583 g kg −1 , and 1,124 kg t −1 , respectively. The top silages presented a mean TDN -1x and predicted milk of 559 g kg −1 and 1046 kg t −1 , respectively. For NDF digestibility and starch concentration, 53.1% and 62.5% of the center samples presented a value equal to or above the reference value (500 g kg −1 and 300 g kg −1 DM for NDF digestibility and starch concentration, respectively). Overall, the corn silage produced on intensive dairy farms in Brazil has satisfactory nutritive value, especially in terms of starch concentration. Some parameters, such as the concentration of fiber and its digestibility, should be improved. This study also shows that a silo may contain two different types of silage: top and center. This alerts nutritionists and farmers when feeding and sampling corn silage from bunker silos.

show abstract

Section: Discussionmentioning

confidence: 99%

Nutritive value of corn silage from intensive dairy farms in Brazil

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Specific to ALA, its proportion in milk was greatest when feeding GC + 3% FSO (Table 6). Lascano et al (2016) reported that the outflow of ALA either tended to increase when the starch degradability of corn grain varied from low to high or increased significantly when feeding soybean oil to fermentors during continuous culture. They also observed a reduction in ALA biohydrogenation with the increase in corn grain starch degradability (Lascano et al, 2016).…”

Section: Flaxseed Oil × Corn Grain Particle Size Interactionmentioning

confidence: 99%

“…In addition, Lascano et al (2016) reported elevated production of trans FA intermediates (e.g., trans-10 18:1, trans-10,cis-12 18:2) associated with milk fat depression when starch degradability was increased from low to high. Results from these 2 studies (Neveu et al, 2014;Lascano et al, 2016) suggest that further research is needed to better understand the potential interactions between oil and cereal grain PS on production and milk FA profile.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with rolled barley, high-moisture corn increased milk cis-9,trans-11 18:2 by 29%, but did not affect ALA (Neveu et al, 2014). Recently, Lascano et al (2016) fed soybean oil and corn grain with different starch degradability to continuous culture fermentors and observed that enhanced intake of UFA increased the accumulation of biohydrogenation intermediates (e.g., trans-10 18:1, trans-11 18:1, cis-9,trans-11 18:2, trans-10,cis-12 18:2). In addition, Lascano et al (2016) reported elevated production of trans FA intermediates (e.g., trans-10 18:1, trans-10,cis-12 18:2) associated with milk fat depression when starch degradability was increased from low to high.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Lascano et al (2016) fed soybean oil and corn grain with different starch degradability to continuous culture fermentors and observed that enhanced intake of UFA increased the accumulation of biohydrogenation intermediates (e.g., trans-10 18:1, trans-11 18:1, cis-9,trans-11 18:2, trans-10,cis-12 18:2). In addition, Lascano et al (2016) reported elevated production of trans FA intermediates (e.g., trans-10 18:1, trans-10,cis-12 18:2) associated with milk fat depression when starch degradability was increased from low to high. Results from these 2 studies (Neveu et al, 2014;Lascano et al, 2016) suggest that further research is needed to better understand the potential interactions between oil and cereal grain PS on production and milk FA profile.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production, milk and plasma fatty acid profile, and nutrient utilization in Jersey cows fed flaxseed oil and corn grain with different particle size

Brossillon

Reis

Moura

et al. 2018

Journal of Dairy Science

View full text Add to dashboard Cite

We aimed to compare the effects of ground (GC) or cracked corn (CC), with or without flaxseed oil (FSO), on milk yield, milk and plasma fatty acid (FA) profile, and nutrient digestibility in Jersey cows fed diets formulated to contain similar starch concentrations. Twelve multiparous organic-certified Jersey cows averaging (mean ± standard deviation) 455 ± 41.9 kg of body weight and 152 ± 34 d in milk and 4 primiparous organic-certified Jersey cows averaging (mean ± standard deviation) 356 ± 2.41 kg of body weight and 174 ± 30 d in milk in the beginning of the experiment were used. Cows were randomly assigned to treatment sequences in a replicated 4 × 4 Latin square design with a 2 × 2 factorial arrangement of treatments. Each period lasted 24 d with 18 d for diet adaptation and 6 d for data and sample collection. Treatments were fed as total mixed rations consisting of (dry matter basis): (1) 0% FSO + 27.1% GC, (2) 0% FSO + 28.3% CC, (3) 3% FSO + 27.1% GC, and (4) 3% FSO + 28.3% CC. All cows were offered 55% of the total diet dry matter as mixed grass-legume baleage and treatments averaged 20% starch. Significant FSO × corn grain particle size interactions were observed for some variables including milk concentration of lactose and proportions of cis-9,cis-12,cis-15 18:3 in milk and plasma. The proportion of cis-9,cis-12,cis-15 18:3 in milk and plasma decreased slightly when comparing GC versus CC in 0% FSO cows, but a larger reduction was observed in 3% FSO cows. Dry matter intake did not differ and averaged 16.1 kg/d across diets. Feeding 3% FSO increased yields of milk and milk fat and lactose and feed and milk N efficiencies, but decreased fat, true protein, and MUN concentrations and apparent total-tract digestibility of fiber. The Σ branched-chain, Σ<16C, Σ16C, and Σn-6 FA decreased, whereas Σ18C, Σcis-18:1, and Σtrans-18:1 FA increased in 3% versus 0% FSO cows. No effect of corn particle size was observed for production and milk components. However, the apparent total-tract digestibility of starch was greater in GC than CC cows. Compared with CC, GC increased Σ branched-chain, Σ<16C, Σ16C, Σn-6 FA, and decreased Σ18C and Σ cis-18:1 FA in milk fat. Overall, results of this study are more directly applicable to dairy cows fed low starch, mixed grass-legume baleage-based diets.

show abstract