Perfil de ácidos graxos do leite de vacas Holandês x Gir em pastagem de capim-marandu suplementado com quantidades crescentes de grão de soja tostado

Mourthé, Mário Henrique França; Reis, R.B.; Gama, Marco Antônio Sundfeld da; Barros, Patrícia Aparecida Vieira de; Antoniassi, Rosemar; Bizzo, H. R.; Lopes, Fernando César Ferraz

doi:10.1590/1678-4162-7489

Cited by 12 publications

(22 citation statements)

References 13 publications

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“…There was no effect of the treatment on the contents of α-linolenic, palmitic, linoleic, oleic, and stearic FAs of the pasture (Table 2), which were generally similar to those reported by Mourthé et al (2015), in pastures of 'Marandu' palisade grass. The highest consumption values of linoleic and α-linolenic FAs, the main precursors for the synthesis of vaccenic acid in the rumen and, consequently, of rumenic acid in milk, were observed under variable rest periods in the third cycle, which suggests the highest intake of pasture DM observed in this condition (Table 3), as previously discussed.…”

Section: Resultssupporting

confidence: 76%

“…In addition, vaccenic acid is a precursor for 19% of the synthesis of rumenic acid in human tissues (Turpeinen et al, 2002). The regression of the contents of rumenic (y) vs. vaccenic (x) acid shows the close association between these two FAs (ŷ = 0.19562 + 0.41382x; r 2 = 0.47, p<0.0001), also reported by Bargo et al (2006) and Mourthé et al (2015). The concentrations of rumenic acid in milk (Table 6) are within the concentrations compiled by in 15 studies with cows in tropical grass pastures, without lipid source supplementation.…”

Section: Resultsmentioning

confidence: 56%

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Milk fatty acid profile of Holstein x Gyr cows on 'Marandu' grass pasture under different grazing strategies

Silva

Rodríguez

Morenz

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the milk fatty acid (FA) profile of Holstein x Gyr cows subjected to two different grazing managements (fixed and variable rest periods) of Urochloa brizantha 'Marandu' pastures. A randomized complete block design was used, with two replicates of pasture areas (blocks) per treatment and four cows per block. Milk production and composition were not affected by grazing strategies. No treatment effects were observed on the proportions (g 100 g -1 of total FA) of the main FAs (palmitic, linoleic, and α-linolenic) of the pasture, but their intakes (grams per day) were affected by differences in forage dry matter intake. The concentrations of FAs in milk plasma and fat were not affected by the treatments. Milk fat contents of rumenic, vaccenic, oleic, and α-linolenic acids varied from 0.71 to 0.93, 1.40 to 1.50, 19.40 to 19.70, and 0.39 to 0.43 g 100 g -1 total FAs, respectively. Grazing strategies of U. brizantha 'Marandu' cause no changes on the milk fatty acid profile of cows.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 56%

Milk fatty acid profile of Holstein x Gyr cows on 'Marandu' grass pasture under different grazing strategies

Silva

Rodríguez

Morenz

et al. 2017

Pesq. agropec. bras.

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“…In companion studies carried out concomitantly with the present study but with the main objective of evaluating the productive performance of the cows, Mourthé et al (2012Mourthé et al ( , 2015 observed an increase in the milk fat content and yield. In addition, there was an improvement in the milk FA profile that was promoted by decreases in the milk fat contents of lauric (C12:0), myristic (C14:0) and palmitic (C16:0) acids, which are considered hypercholesterolemic (FAO, 2010), and by increases in the milk fat contents of oleic and α-linolenic acids.…”

Section: Introductionsupporting

confidence: 52%

“…In addition, there was an improvement in the milk FA profile that was promoted by decreases in the milk fat contents of lauric (C12:0), myristic (C14:0) and palmitic (C16:0) acids, which are considered hypercholesterolemic (FAO, 2010), and by increases in the milk fat contents of oleic and α-linolenic acids. In addition, high milk fat contents of trans-11 C18:1 (2.19-2.57 g 100 g -1 FA) and rumenic acid (0.93-1.01 g 100 g -1 FA) were obtained (MOURTHÉ et al, 2015), illustrating the potential of milk production systems based on tropical grass pasture supplemented with RS.…”

Section: Introductionmentioning

confidence: 87%

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Ruminal metabolic parameters and milk fatty acid profile of cows grazing Marandu grass supplemented with roasted soybeans

Mourthé

Lopes

Reis

et al. 2019

SCA

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The goal of this study was to evaluate the ruminal metabolic parameters and milk fatty acid composition of cows managed under continuous grazing on Marandu grass. Four rumen-cannulated Holstein x Gyr cows with an average milk yield of 21±2 kg day -1 and 79±16 days in milk were used in a 4 x 4 Latin Square design. Each cow received 6 kg day -1 of a concentrate formulated with 0 (control), 1.3, 2.6 or 3.9 kg of roasted soybeans (as-fed basis), which were the experimental treatments. The inclusion of roasted soybeans promoted a linear reduction in the acetate concentration, with no effect on the pH and ruminal ammonia N concentration. There was no effect of the treatments on the ruminal degradability of the dry matter and neutral detergent fiber of Marandu grass or on the kinetic parameters of the fluids in the rumen. There were linear increases in the contents of fat and total solids in the milk and a linear decrease in the milk lactose content, but there was no effect of the treatments on the yield of these components or on milk yield. There were linear increases in milk fat stearic, elaidic, oleic, linoleic and α-linolenic acidis contents, but there was no effect of the treatments on the milk fat contents of vaccenic and rumenic acids. Notably, supplementing Marandu grass with a concentrate containing up to 3.9 kg of roasted soybeans improved the nutritional quality of the milk fat due to increases in the milk fat contents of oleic and α-linolenic acids, which are considered beneficial to human health, and reductions in the levels of lauric, myristic and palmitic, which are considered hypercholesterolemic fatty acids. ResumoObjetivou-se neste estudo avaliar parâmetros de metabolismo no rúmen e o perfil de ácidos graxos do leite de vacas manejadas sob pastejo contínuo em capim-Marandu. Foram utilizadas quatro vacas mestiças Holandês x Gir com 79±16 dias de lactação, produzindo 21±2 kg dia -1 de leite, canuladas no rúmen e alocadas em delineamento Quadrado Latino 4 x 4. Cada vaca recebeu 6 kg dia -1 de concentrado formulado com 0 (Controle); 1,3; 2,6 ou 3,9 kg de grão de soja tostado (base matéria natural), que consistiram nos tratamentos experimentais. A inclusão de grão de soja tostado promoveu redução linear na concentração de acetato, sem efeito sobre o pH e a concentração de N amoniacal no rúmen. Não houve efeito dos tratamentos sobre a degradabilidade ruminal da matéria seca e da fibra em detergente neutro do pasto, nem sobre os parâmetros da cinética de fluidos no rúmen. Houve incremento linear nos teores de gordura e de sólidos totais e redução linear no teor de lactose do leite, mas não houve efeito dos tratamentos sobre as produções destes componentes nem sobre a produção de leite. Houve incremento linear nos teores dos ácidos graxos esteárico, elaídico, oleico, linoleico e α-linolênico no leite, mas não houve efeito dos tratamentos sobre os teores no leite dos ácidos vacênico e rumênico. A suplementação do pasto de capim-Marandu com concentrado contendo até 3,9 kg de grão de soja tostado melhorou a quali...

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Zebu‐Brahma and Mithun Milk

Fonseca

2017

Handbook of Milk of Non‐Bovine Mammals

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Perfil de ácidos graxos do leite de vacas Holandês x Gir em pastagem de capim-marandu suplementado com quantidades crescentes de grão de soja tostado

Cited by 12 publications

References 13 publications

Milk fatty acid profile of Holstein x Gyr cows on 'Marandu' grass pasture under different grazing strategies

Milk fatty acid profile of Holstein x Gyr cows on 'Marandu' grass pasture under different grazing strategies

Ruminal metabolic parameters and milk fatty acid profile of cows grazing Marandu grass supplemented with roasted soybeans

Zebu‐Brahma and Mithun Milk

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