Perfil granulométrico da fibra dietética sobre o tempo médio de retenção e a digestibilidade aparente de dietas para vacas leiteiras

Bezerra, Edinaldo da Silva; Queiróz, Augusto César de; Bezerra, Ana Raquel Gomes Faria; Pereira, José Carlos; Paulino, Mário Fonseca

doi:10.1590/s1516-35982004000900026

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…However, the reduced diet particle size promoted by the combination of the haying and grinding techniques used in this study likely increased the rate of food passage through the rumen (Bezerra et al, 2004). These conditions decreased biohydrogenation, which favors unsaturated fatty acid deposition in the meat, perhaps explaining the lack of differences (P>0.05) in the levels of these fatty acids in the meat from lambs supplemented with both forage: concentrate ratios (57.8 × 57.3 g/100 g).…”

Section: Discussionmentioning

confidence: 94%

Physicochemical characteristics and fatty acid profile of meat from lambs with different genotypes and diets

Costa

Santos²,

Queiroga

et al. 2015

R. Bras. Zootec.

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-The objective of this study was to evaluate the chemical composition and fatty acid profile of meat from Santa Inês, Dorper × Santa Inês, and undefined-breed lambs finished in a feedlot system according to two forage:concentrate ratios (50:50 and 20:80) in the diet. Overall, 54 non-castrated animals were used (with an average initial weight of 23±1.5 kg at 150 days old) and were slaughtered when they reached 36 kg of live weight or 63 days of confinement. Diets with high concentrate levels favored meat production with higher protein content. Among the saturated fatty acids, only heptadecanoic (C17:0) and arachidic acids (C20:0) differed among the treatments. The amount of oleic acid detected in the meat ranged from 49.2 to 51.9 g/100 g, making this one the most representative fatty acids. Regardless of the diet and genotype, the unsaturated fatty acid and desirable fatty acid levels in the lamb meat characterize it as of satisfactory quality for the consumer market.

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Section: Discussionmentioning

confidence: 94%

Physicochemical characteristics and fatty acid profile of meat from lambs with different genotypes and diets

Costa

Santos²,

Queiroga

et al. 2015

R. Bras. Zootec.

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“…This is true not only because these animals still depend on the physical and physiological effects of the fiber in the gastrointestinal tract, but mostly because of the costs that the feedstuffs can present (Bezerra et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Intake, performance and nutrient digestibility of sheep fed sugarcane treated and ensiled with calcium oxide or urea

et al. 2013

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-The objective of this study was to evaluate intake, performance and nutrient digestibility of sheep supplemented with sugarcane ensiled with four levels of calcium oxide (0.0, 0.8, 1.6 and 2.4%) and urea (1.5%), on a natural matter basis. Twenty castrated Santa Ines lambs with 24.09 kg average weight were housed in individual 1.5 m 2 pens, distributed in a completely randomized design. The diet supplied had a roughage:concentrate ratio of 70:30 and the experimental period lasted 77 days, of which 14 days were used for adaptation to the diet and three 21-day periods for data collection. No differences were observed for the average daily intake of dry matter, ether extract, neutral detergent fiber, neutral detergent fiber corrected for ash and protein, total carbohydrates, hemicellulose and total digestible nutrients. The treatment with urea showed differences for the intake (kg/day) of crude protein, acid detergent fiber and non-fibrous carbohydrates. There was no effect of diets on the digestibility of dry matter, ether extract, neutral detergent fiber, acid detergent fiber or total digestible nutrients, but there was a quadratic effect for total carbohydrates and increasing linear effect for non-fibrous carbohydrates. The calcium intake increased as the levels of calcium oxide in the sugarcane were elevated. The calcium:phosphorus ratio in the silage of calcium oxide was different from the silage with urea and control. No effect was observed for the performance characteristics of sheep. Sugarcane silages with calcium oxide levels of up to 2.4% or with urea do not improve the intake or weight gain of sheep.

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“…(MERTENS et al, 2003). Therefore, the use of foods for the constitution of diets with high levels of neutral detergent fiber (NDF) may reduce feed costs, but may also promote restriction of food consumption due to the need for longer rumen food (BEZERRA et al, 2004). In the present study, it was possible to determine the viability of the microorganisms.…”

Section: Resultsmentioning

confidence: 96%

Alternatives for Spring Forage Emptiness in Pampa, Brazil

Malaguez

Dinarte

Tadielo

et al. 2017

Rev. Agric. Neotrop.

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The spring forage emptiness is an obstacle to the development of Brazilian livestock, including in the Bioma Pampa region. Feed strategies for this period contributed to the development of livestock and to the conservation of the biome. The objective of this work was to know the nutritional potential of forages during spring forage for use as strategies in the forage planning. The experiment had a completely randomized design, with ten forages and four replicates. The chemical composition, in vitro dry matter digestibility (IVDMD) and the total digestible nutrient content (NTD) of elephant grass, brachiaria cultivars Convert and Marandu, Tifton 68; diploid and tetraploid ryegrass; red, white and arrowleaf clover; and bird’s-foot trefoil. The grasses had a higher proportion of fibrous constituents, and lower levels of NDT and DMD, thus, lower nutritional value. Negative correlation between mineral matter and fibrous constituents with CP, TDN and IVDMD, was observed. Forages studied can be used as pasture alternatives for ruminants in the spring forage emptiness of the Pampa, Brazil, however, the strategy of using them should be a pasture planning.

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Perfil granulométrico da fibra dietética sobre o tempo médio de retenção e a digestibilidade aparente de dietas para vacas leiteiras

Cited by 8 publications

References 29 publications

Physicochemical characteristics and fatty acid profile of meat from lambs with different genotypes and diets

Physicochemical characteristics and fatty acid profile of meat from lambs with different genotypes and diets

Intake, performance and nutrient digestibility of sheep fed sugarcane treated and ensiled with calcium oxide or urea

Alternatives for Spring Forage Emptiness in Pampa, Brazil

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