Fatty acid profiles of rumen fluid from sheep fed diets supplemented with various oils and effect on the rumen ciliate population

Váradyová, Zora; Kišidayová, Svetlana; Siroka, P.; Jalč, D.

doi:10.17221/2322-cjas

Cited by 32 publications

(25 citation statements)

References 24 publications

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“…The concentration of the other main isomer (CLA, cis 9, trans 11 C 18:2 ) increased (P < 0.001) as the n-6/n-3 ratio increased (Table 3). Similar results were reported by Váradyová et al (2007), who studied the effect of sunflower oil and rapeseed oil (5% wt/wt) supplement to meadow haybarley grain (80:20%) diet in sheep on the profile of fatty acids and their isomers (CLA, TVA) in rumen fluid. On the contrary, Kim et al (2005) found that the CLA concentration decreased as the n-6/n-3 ratio increased.…”

Section: Effect Of Modifying N-6/n-3 Ratio Of Dietary Oil Supplementssupporting

confidence: 85%

Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen

Jalč¹,

Čertı́k²,

Kundrikova³

et al. 2009

CZECH J ANIM SCI

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The objective of this study was to examine the effect of microbial oil (MO, n-6 fatty acids) and fish oil (FO, n-3fatty acids) used in their blends as supplements (5% wt/wt) to the diet containing 80% of hay and 20% of barley on rumen fermentation and lipid metabolism in artificial rumen. Overall, three different ratios of n-6 and n-3 fatty acids (1:1, 3:1, and 5:1) as the blends of MO and FO were used. Two similar consecutive experiments were carried out within 2 months. Each experiment lasted for 12 days with 6 days of stabilization period. The addition of all three oil blends did not affect the parameters of fermentation such as degradation of dry matter (DM), detergent fibre, total gas production, but increased the degradation of cellulose and hemicellulose in the diets. The supplementation of oil blends to the diet insignificantly (NS) decreased the methane production (mostly the n-6/n-3 ratio 1:1, about 23.5%), increased (P < 0.01) mol% of propionate (mostly the n-6/n-3 ratio 1:1, about 24.1%) and decreased (P < 0.05) mol% of acetate (mostly the n-6/n-3 ratio, 1:1, about 7.7%). The lipid metabolism in artificial rumen was also affected, when the oil blends increased (P < 0.001) the concentration of total fatty acids (FA) and long-chain FA (LCFA) in effluent. The concentration (mg/g rumen fluid DM) of trans (trans 11 C18:1, TVA-vaccenic acid), cis C18:1 isomers and CLA-conjugated linoleic acid (cis 9, trans 11 C18:2) was also increased (P < 0.001) by the oil blends. Finally, the oil blends caused the incomplete FA biohydrogenation by an increase in TVA concentration and TVA/C18:0 ratio in effluent in artificial rumen.

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Section: Effect Of Modifying N-6/n-3 Ratio Of Dietary Oil Supplementssupporting

confidence: 85%

Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen

Jalč¹,

Čertı́k²,

Kundrikova³

et al. 2009

CZECH J ANIM SCI

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“…O aumento nos teores de EE pode afetar a digestão ruminal dos alimentos, principalmente dos carboidratos fibrosos, quando comparados aos carboidratos não fibrosos (Váradyová et al, 2007). Os efeitos deletérios dos ácidos graxos, sobretudo poli-insaturados, na digestão pode ter caráter físico ou químico (Ivan et al, 2001;Váradyová et al, 2007).…”

Section: Resultsunclassified

“…Os efeitos deletérios dos ácidos graxos, sobretudo poli-insaturados, na digestão pode ter caráter físico ou químico (Ivan et al, 2001;Váradyová et al, 2007). O efeito físico resulta da formação de uma superfície protetora nas partículas dos alimentos, que aumenta a tensão superficial e Tabela 2.…”

Section: Resultsunclassified

Desempenho de cordeiros confinados, alimentados com dietas à base de torta de girassol

Rodrigues

Cabral

Lima

et al. 2013

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar os efeitos da inclusão da torta de girassol na dieta de cordeiros em confinamento sobre o desempenho produtivo dos animais. Utilizaram-se 40 cordeiros sem raça definida, não castrados, com peso médio inicial de 20,17±2,66 kg, alimentados com 0, 7, 14, 21 e 28% de torta de girassol na dieta (base seca). O experimento foi conduzido em delineamento de blocos ao acaso. A inclusão de torta de girassol na dieta não alterou o consumo médio de matéria seca (883,58 g por dia), a conversão alimentar (4,40) e o consumo médio de água (2,59 L por dia). O aumento dos níveis de torta de girassol diminuiu linearmente o peso final, o ganho de peso total, o ganho de peso diário e a área de olho de lombo. O nível de inclusão de até 28% não afeta o consumo médio de matéria seca e de água, mas reduz o desempenho e a área de olho de lombo. Para obter o menor custo com a dieta, o nível de inclusão da torta de girassol pode atingir até 28% da matéria seca, quando o seu preço representar até 40% do preço da mistura entre milho e farelo de soja.Termos para indexação: avaliação econômica, confinamento, coprodutos, custo da dieta, ovinos. Performance of feedlot lambs fed with diets based on sunflower mealAbstract -The objective of this work was to evaluate the effects of inclusion levels of sunflower meal in feedlot lamb diets on animal productive performance. Forty crossbreed lambs, not castrated, with average initial body weight of 20.17±2.66 kg were feed levels of 0, 7, 14, 21, and 28% of sunflower meal in the diet (dry basis). The experiment was carried out in a randomized complete block design. The inclusion of sunflower meal in the diet did not affect average dry matter intake (883.58 g per day), feed conversion (4.40), and average water intake (2.59 L per day). The increase in the levels of sunflower meal linearly reduced final weight, total weight gain, average daily gain, and loin eye area. The inclusion level of up to 28% does not affect the average intake of dry matter and water, but reduces animal performance and loin eye area. To obtain the lowest cost with the diet, the inclusion level of sunflower meal can reach up to 28% of dry matter, when its price represents up to 40% of the price of corn and soybean meal blend.

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“…Another study showed that the addition of linseed oil (52% C18:3 linolenic acids) to cows' rations decreased the number of cellulolytic bacteria, particularly of Butyrivibrio fibrisolvens, Ruminococcus albus, and Fibrobacter succinogenes (Yang et al 2009). Varadyova et al (2007) demonstrated that the addition of linseed oil to the diet of sheep decreased the count of total protozoa, mainly Entodinium spp., but also the family Isotrichidae. On the other hand, these authors did not find any difference in the number of protozoa between sheep fed rapeseed oil and control animals.…”

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confidence: 99%

Supplementation of rapeseed and linseed oils to sheep rations: effects on ruminal fermentation characteristics and protozoal populations

Majewska¹,

Miltko²,

Bełżecki³

et al. 2017

Czech J. Anim. Sci.

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Majewska M.P., Miltko R., Bełżecki G., Skomiał J., Kowalik B. (2017): Supplementation of rapeseed and linseed oils to sheep rations: effects on ruminal fermentation characteristics and protozoal populations. Czech J. Anim. Sci., 62, 527−538.The study was performed on six sheep fitted with a cannula in the rumen and re-entrant cannula in the duodenum; divided into three groups, two sheep in each. The animals were fed meadow hay and the concentrate alone or the same diet supplemented with rapeseed or linseed oils at a dose of 5% of the basal diet. Ruminal degradation of protein and acid detergent fibre were lower when sheep were fed rapeseed compared to linseed oil (P < 0.05). The addition of oils to diets caused increased ruminal degradation of fat (P < 0.01). The density of protozoa in the rumen at 2 or 4 h after feeding was lower than before feeding in each experimental group. The inclusion of rapeseed oil in the diet decreased the total number of ciliates and Entodinium spp. compared with control and animals fed linseed oil (P < 0.01). Before feeding, the concentration of Diplodinium and Ophryoscolex spp. were lower in sheep fed rapeseed oil compared to control (P < 0.05), and the number of Dasytricha species decreased 2 h after feeding linseed oil compared to animals fed rapeseed oil (P < 0.05). Each of the oil supplements decreased the bacterial mass in the rumen compared with control (P < 0.01). The addition of rapeseed oil to the diet decreased total volatile fatty acid and acetate concentrations in the rumen in comparison to control and sheep receiving linseed oil (P < 0.01). In both diets, the estimated emission of methane and carbon dioxide (P < 0.01) increased 2 and 4 h after feeding compared to that at 0 h. The oleic acid more strongly reduced protozoa and digestive processes in the rumen than linolenic acid. Nevertheless, the quantity of oils added was still too low to induce detectable changes in methane formation in the rumen.

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Fatty acid profiles of rumen fluid from sheep fed diets supplemented with various oils and effect on the rumen ciliate population

Cited by 32 publications

References 24 publications

Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen

Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen

Desempenho de cordeiros confinados, alimentados com dietas à base de torta de girassol

Supplementation of rapeseed and linseed oils to sheep rations: effects on ruminal fermentation characteristics and protozoal populations

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