Protein Protected Fat for Ruminants: III. Digestion and Performance of Lambs

Shell, Lee A.; Dryden, F. D.; Mata-Hernandez, A.; Hale, W. H.

doi:10.2527/jas1978.4651332x

Cited by 3 publications

(2 citation statements)

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“…In general, the content of palmitic acid remained unaltered throughout the experiment in all plasma lipid fractions, even though the levels of this acid in the experimental diets were different (Shell et al, 1978).…”

Section: Resultsmentioning

confidence: 86%

“…Six lambs were fed the 8% PCO diet for the first 30 days of the trial, at which time this group was divided into two groups where three Iambs were placed on the 12% PCO diet for the remainder of the trial. The feeding periods and allotment of animals to the diets are further discussed by Shell et al (1978). These authors have also 1338 JOURNAL OF ANIMAL SCIENCE, Vol.…”

Section: Methodsmentioning

confidence: 99%

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Protein Protected Fat for Ruminants. IV. Plasma Lipid, Insulin and Depot Fat Composition of Lambs

Mata-Hernandez

Dryden

Marchello

et al. 1978

Journal of Animal Science

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Fourteen crossbred lambs with an average weight of 29.4 kg were utilized to determine the influence of the nature and amount of dietary lipid intake on the qualitative and quantitative composition of the plasma lipid, carcass depot fats and plasma insulin levels. Formaldehyde treated casein-cottonseed oil (PCO) was supplemented at the rate of 8% (three lambs) and 12% (three lambs). Two groups of four lamb each were assigned to diets containing no added fat (control) and 8% unprotected cottonseed oil (8% CO).Dietary lipid supplementation was effective in elevating (P<.05) the lipid levels of the blood. No difference (P>.05) in plasma insulin levels were detected between the four diets. Oil supplementation increased (P<.05) the concentration of linoleic acid in the four plasma lipid fractions: cholesterol esters, phospholipids, free fatty acids and triglycerides. Although not always statistically significant, the content of total unsaturates tended to increase (P<.05) in all plasma fractions.Subcutaneous fat biopsies obtained from the tailhead region at 0, 14, 42 and 84 days on feed revealed that the type of dietary fat fed was effective in altering the type of fatty acids deposited subcutaneously. Feeding cottonseed oil protected from rumen fermentation elevated the linoleic acid levels of subcutaneous fat, but the total unsaturated fatty acid levels were not different between diets. (

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Section: Resultsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Protein Protected Fat for Ruminants. IV. Plasma Lipid, Insulin and Depot Fat Composition of Lambs

Mata-Hernandez

Dryden

Marchello

et al. 1978

Journal of Animal Science

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Effect of rumen-protected supplements of fish oil on intake, digestibility and nitrogen balance of growing goats

Fernández¹,

Osorio²,

Ramos³

et al. 2004

Anim. Sci.

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Two groups of six male goats were used to assess the effects of rumen-protected supplements offish oil on intake, digestibility and nitrogen (N) balance. The animals were offered a diet consisting of forage and concentrate, the latter fraction supplemented with 0 (control) or lOOg/kg of rumen-protected fish oil supplement (PFO), containing a high proportion of the n-3 series (whole diet contained 0 or 60 g PFO per kg dry matter). No significant differences (P > 0.05) were found between the two groups concerning live-weight gain, food intake, digestibility of DM, organic matter, N, neutral-detergent fibre and energy. In contrast, there were differences (P < 0.05) regarding the digestibility of fat and of acid-detergent fibre, which were higher among the animals given the PFO diet. With respect to the individual fatty acids, we observed higher digestibility (P < 0.05) of C14:0, C16:0, C18:0 and C20:0 among the animals given the PFO diet. The digestibility of C14:0, C18:0 and C20:0 was found to be negative among the animals given the control diet. No significant differences (P > 0-05) were found regarding digestibility of total C18:1. In contrast, the coefficients for C18:2 (n-6) and C18:3 (n-3) were higher (P < 0.05) among the non-supplemented animals. The intake and faecal flow values of C18:0 suggest that the mono- and polyunsaturated fatty acids with 18 atoms of carbon may, in both cases, undergo partial hydrogenation, which would be greater among the control group. The utilization of C20:5 (n-3) and, especially, of C22 : 6 (n-3), which were consumed only by the animals given the PFO diet, was estimated at 1-000. The PFO diet also produced lower levels ofurinary-N excretion (P < 0.05), giving rise to higher N balances (P < 0.05).

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Degradabilidad ruminal de grasas de sobrepaso

Fuentes Rodríguez,

Ortíz de la Rosa

1994

Agraria

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El experimento fue conducido para determinar la degradación ruminal de grasa de bovino y de porcino tratadas con diferentes niveles (0.0, 20.0 y 40.0%) de Cloruro de Calcio, a las 12 y 24 hr de incubación. Se utilizaron tres novillos fistulados ruminalmente, alimentados con heno de avena. Tres bolsas por tratamiento y por período de incubación con 5 gr de grasa de bovino o de porcino tratadas, fueron suspendidas en el rumen. Al sacar las bolsas fueron lavadas, secadas y pesadas, para calcular por diferencia la degradabilidad ruminal. Los resultados fueron analizados con un modelo completamente al azar con igual número de repeticiones y arreglo factorial de 2x2x3. La degradabilidad de la grasa de bovino tratada disminuyó (P<0.05) a medida que se incrementaron los niveles de Cloruro de Calcio, a las 12 hr de incubación (42.00, 23.35 y 7.54%, respectivamente) y a las 24 hr de incubación (58.43, 29.24 y 11.44%, respectivamente). Una tendencia similar fue observada para la grasa de porcino, encontrándose valores de 47.14, 32.13 y 15.80% a las 12 hr de incubación, y de 52.07, 44.46 y 18.82%, a las 24 hr de incubación, respectivamente para los tratamientos con 0.0, 20.0 y 40.0% de Cloruro de Calcio. Se encontraron diferencias (P<0.05) entre la degradabilidad de la grasa de bovino y la grasa de porcino, en los diferentes tratamientos y períodos de incubación. El tratamiento de grasas con sales de Cloruro de Calcio disminuye su degradación ruminal, por lo que es recomendable incluir este tipo de alimentos tratados en las dietas de animales con altos requerimientos de energía.

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Protein Protected Fat for Ruminants: III. Digestion and Performance of Lambs

Cited by 3 publications

References 0 publications

Protein Protected Fat for Ruminants. IV. Plasma Lipid, Insulin and Depot Fat Composition of Lambs

Protein Protected Fat for Ruminants. IV. Plasma Lipid, Insulin and Depot Fat Composition of Lambs

Effect of rumen-protected supplements of fish oil on intake, digestibility and nitrogen balance of growing goats

Degradabilidad ruminal de grasas de sobrepaso

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