Sources of omega-6 fatty acids do not alter the rumen degradation and transit of fibre from dairy cow diets

Bettero, Vítor Pereira; Gandra, Jefferson Rodrigues; Nunes, Helber Véras; Freitas, J. E.; Barletta, Rafael Villela; Carvalho, Marina Vieira de; Detmann, Edênio; Pereira, José Carlos

doi:10.22358/jafs/65916/2013

Cited by 4 publications

(10 citation statements)

References 15 publications

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“…The results obtained (Tables 2 and 3) corroborate those presented by Sousa et al (2009) and Bettero et al (2013). In an in vitro assay, the inclusion of 10% WCS in a diet based on 55% corn silage did not change the potential degradability, degradation rate or effective degradability of NDF (P>0.05) (Bettero et al, 2013). Sousa et al (2009) reported that the inclusions of 7% or 14% WCS in chopped sugarcane-based diets did not alter the digestibility of DM, OM, CP, NDF and NFC or the CP and NDF intakes (kg day -1 cow -1 ) by 7/8 Holstein x Gyr cows.…”

Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 82%

“…This phenomenon occurs with the WCS, where the polyunsaturated FAs are protected inside the seed, requiring greater effort of rumination and mastication for its release (Nogueira, Perna, Pereira, & Rodrigues, 2019), providing small amounts of lipids in the ruminal environment, which may result in rapid BH, avoiding unsaturated FA accumulation and impairment of the ruminal degradation of the fiber. Moreover, the amount will not be enough to adhere to feed particles, causing physical impediment to microorganisms and microbial enzymes (Bettero et al, 2013). Thus, in the present study, the lack of effect of the inclusion of WCS on the parameters of ruminal DM and NDF degradability (Table 3) and on apparent digestibility of the nutrients (Table 2) could be linked to slow release of lipids in the rumen by WCS, not exceeding the hydrogenating capacity and preventing potential deleterious effects on the resident microbiota, fiber digestion and DM intake (Almeida et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

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Ruminal fermentation and degradation, kinetic flow of digesta and milk fatty acid composition of cows fed sugarcane silage-based diets supplemented with whole cottonseed

Costa

Lopes

Rebouças

et al. 2020

SCA

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The aim of this study was to evaluate the ruminal fermentation and degradation parameters, the kinetic flow of digesta in the gastrointestinal tract, and the milk fatty acid (FA) profile in Holstein x Gyr cows fed 59% sugarcane silage-based diets with 0% (control), 5%, 10% and 15% whole cottonseed (WCS) on a dry matter (DM) basis. Four rumen-cannulated cows with an average milk yield of 14.4±3.3 kg day-1 and 85±25 days in milk were allocated in a 4 x 4 Latin square design. There was no effect of dietary WCS levels on the intake of organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and nonfibrous carbohydrates, but there was a linear increase in the intake of ether extract (EE). There was no treatment effect on the apparent digestibility of DM, OM, CP, EE and NDF or on the ruminal degradability parameters for DM and NDF of sugarcane silage. Also, no treatment effects were observed on rumen pH, ruminal and postruminal particulate passage rates or on the rate of passage of the fluids in the rumen. WCS promoted linear reductions in the milk fat contents of lauric, myristic and palmitic acids and linear increases in the milk fat contents of stearic, oleic, trans-10 C18:1 and elaidic acids. The milk fat contents of vaccenic, rumenic, linoleic and ?-linolenic acids were unaffected by WCS supplementation. The inclusion of up to 15% WCS in sugarcane silage-based diets did not alter the digestibility of nutrients, the rumen degradability of the fiber, or the kinetic flow of digesta in the gastrointestinal tract of Holstein x Gyr cows but improved the nutritional quality of milk fat through an increase in the content of oleic acid, which is beneficial to human health, and decreased levels of hypercholesterolemic lauric, myristic and palmitic acids.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Ruminal fermentation and degradation, kinetic flow of digesta and milk fatty acid composition of cows fed sugarcane silage-based diets supplemented with whole cottonseed

Costa

Lopes

Rebouças

et al. 2020

SCA

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“…Furthermore, the passage rate of feed in the rumen is an important variable to determine the digestive flow through the digestive tract. Bettero et al (2013) reported that increasing level of fat in the diet could reduce the passage rate of nutrients and consequently may decrease DMI, as observed in the present study.…”

Section: Discussionsupporting

confidence: 82%

“…These features can be attributed to the toxic effects of polyunsaturated FA on ruminal protozoa and bacteria (Jenkins, 1993;Howlett et al, 2003). However, depending on the type of FA, the amount of unsaturation, and how it gets into the rumen, free or partially protected, this effect can be maximized or minimized (Bettero et al, 2013). FA from oilseeds, such as soyabean grain, are slowly released into the rumen, consequently avoiding unsaturated FA accumulation and impairment of ruminal fibre degradation (Bettero et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of different dietary inclusion levels of whole raw soyabean on ruminal fermentation and nutrient utilization in Nelore steers

Cônsolo¹,

Gandra²,

Gardinal³

et al. 2017

J. Anim. Feed Sci.

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Degradabilidade do capim-marandu manejado sob pastejo por vacas suplementadas ou não com óleo de soja

Silva

Carvalho

Cruz

et al. 2018

Pubvet

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This work aimed to evaluate the effect of supplementation with concentrate containing or not soybean oil on rumen degradation of dry mater (DM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of Marandu grass managed with occupation period of two days with 28 days of rest and 2.6 AU/ha of stocking rate. An in situ trial was carried out with three dry crossbred ¾ Gyr x ¼ Holstein rumen cannulated cows arranged in 3 x 3 crossover design with three treatments: no supplementation (NS), supplementation with non-soybean oil concentrate (NO), supplementation with 7% soybean oil concentrate (SO). Incubation periods were 0, 6, 12, 36, 48 and 96 hours. There was no difference among treatments. The values of potential degradability of DM, NDF and ADF of marandu-grass determined in animals from NS, NO and SO were: 81.80%, 92.12% and 91.54%; 56.05%, 58.60% and 60.21%; 60.01%, 64.34% and 65.17%, respectively. Supplementation with concentrate containing or not 7% of soybean oil do not change rumen degradation parameters of marandu-grass.

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Sources of omega-6 fatty acids do not alter the rumen degradation and transit of fibre from dairy cow diets

Cited by 4 publications

References 15 publications

Ruminal fermentation and degradation, kinetic flow of digesta and milk fatty acid composition of cows fed sugarcane silage-based diets supplemented with whole cottonseed

Ruminal fermentation and degradation, kinetic flow of digesta and milk fatty acid composition of cows fed sugarcane silage-based diets supplemented with whole cottonseed

Effect of different dietary inclusion levels of whole raw soyabean on ruminal fermentation and nutrient utilization in Nelore steers

Degradabilidade do capim-marandu manejado sob pastejo por vacas suplementadas ou não com óleo de soja

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