Ruminal fermentation and degradability of sorghum cultivar whole crop, and grains, using an in vitro gas production technique

Filho, S.L.S. Cabral; Abdalla, Adibe Luiz; Bueno, Ives Cláudio da Silva; Nozella, E.F.; Rodrigues, Jorge

doi:10.1016/j.anifeedsci.2005.04.036

Cited by 15 publications

(8 citation statements)

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“…Physically effective NDF was assumed to be the NDF content of the material retained on a 1.18-mm sieve, as a proportion of total DM(Mertens, 1997).5 In vitro dry matter degradability, as determined by incubating 0.8-g samples in 160-mL serum bottles for 96 h, according to CabralFilho et al (2005). Means are significantly different (P < 0.01).at Univ of Connecticut Homer Babbidge Lib on January 2, 2014 www.journalofanimalscience.org Downloaded from…”

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Energy efficiency of growing ram lambs fed concentrate-based diets with different roughage sources

Galvani

Pires

Susin

et al. 2014

Journal of Animal Science

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Poor-quality roughages are widely used as fiber sources in concentrate-based diets for ruminants. Because roughage quality is associated with the efficiency of energy use in forage-based diets, the objective of this study was to determine whether differing the roughage source in concentrate-based diets could change the energy requirements of growing lambs. Eighty-four 1/2 Dorper × 1/2 Santa Inês ram lambs (18.0 ± 3.3 kg BW) were individually penned and divided into 2 groups according to primary source of dietary roughage: low-quality roughage (LQR; sugarcane bagasse) or medium-quality roughage (MQR; coastcross hay). Diets were formulated to be isonitrogenous (2.6% N) and to meet 20% of physically effective NDF. After a 10-d ad libitum adaptation period, 7 lambs from each group were randomly selected and slaughtered (baseline). Twenty-one lambs in each diet group were fed ad libitum and slaughtered at 25, 35, or 45 kg BW. The remaining 28 lambs (14 from each diet group) were submitted to 1 of 2 levels of feed restriction: 70% or 50% of the ad libitum intake. Retentions of body fat, N, and energy were determined. Additionally, 6 ram lambs (44.3 ± 5.6 kg BW) were kept in metabolic cages and used in a 6 × 6 Latin square experiment designed to establish the ME content of the 2 diets at the 3 levels of DM intake. There was no effect of intake level on diet ME content, but it was greater in the diet with LQR than in the diet with MQR (3.18 vs. 2.94 Mcal/kg, respectively; P < 0.01). Lambs fed the diet with LQR had greater body fat (g/kg of empty BW) and energy concentrations (kcal/kg of empty BW) because of a larger visceral fat deposition (P < 0.05). Using a low-quality roughage as a primary source of forage in a concentrate-based diet for growing lambs did not change NEm and the efficiency of ME use for maintenance, which averaged 71.6 kcal/kg(0.75) of shrunk BW and 0.63, respectively. On the other hand, the greater nonfibrous carbohydrate content of the diet with LQR resulted in a 17% better efficiency of ME use for gain (P < 0.01), which was associated with a greater partial efficiency of energy retention as fat (P < 0.01). This increased nutritional efficiency, however, should be viewed with caution because it is related to visceral fat deposition, a nonedible tissue.

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Energy efficiency of growing ram lambs fed concentrate-based diets with different roughage sources

Galvani

Pires

Susin

et al. 2014

Journal of Animal Science

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“…Cabral Filho et al (2005) y Reina et al (2007) observaron un aumento en la producción de gas in vitro en granos de sorgo con taninos cuando les agregaron PEG como inactivador de taninos. Además, los granos cuando se tratan con urea presentan una mayor digestibilidad in vitro y tasa de desaparición de la MS (Russell et al, 1988).…”

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Desactivación de taninos en grano húmedo de sorgo con polietilenglicol o urea

et al. 2012

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“…Se han hallado amplias diferencias en la degradabilidad entre híbridos de sorgo (Cabral Filho et al, 2005), debidas a variaciones en el contenido y la digestibilidad del almidón y a las cantidades y tipos de formación existente acerca de la relación entre las características físicas y químicas de los granos de sorgo y su degradabilidad a nivel ruminal, se plantea como objetivo del presente estudio relacionar las característi-cas físicas y químicas de varios genotipos de sorgo con la degradabilidad ruminal in situ en bovinos, para identificarlas como posibles predictoras de la misma. -Peso hectólitro: se empleó una balanza de peso hectólitro tipo Schlopper de cuarto litro, y al valor de peso obtenido se multiplicó por el factor 0,4 para expresar los resultados en kg/hl (Maxson et al, 1971).…”

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Características físicas y químicas del grano de sorgo: Relación con la degradación ruminal en bovinos

et al. 2011

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PALABRAS CLAVES ADICIONALESTaninos. ADDITIONAL KEYWORDSTannins. RESUMENSe estudió la relación entre las características físicas y químicas de diferentes híbridos de granos de sorgo y la degradabilidad in situ de la materia seca (MS), proteína bruta (PB) y almidón. Las características físicas (peso hectólitro, relación de molienda, porcentaje de flotación, densidad aparente) y químicas (taninos, PB y kafirinas) fueron relacionadas con la degradabilidad ruminal de los granos de sorgo para identificarlas como posibles predictoras de la misma. Se detectaron diferencias entre los híbridos en la degradabilidad in situ de la MS, PB y almidón tras 16 horas de incubación en el rumen. Las características físi-cas de los granos no se relacionaron con la degradabilidad in situ de los mismos. Sin embargo, los contenidos de taninos y de kafirinas de los granos estuvieron relacionados con la degradabilidad in situ de la MS, PB y almidón. La degradabilidad del grano de sorgo fue altamente dependiente del genotipo y el contenido de taninos fue el mejor predictor de la degradabilidad de la MS. SUMMARYWe studied the relationship between physical or chemical characteristics of different sorghum grain hybrids on in situ dry matter (DM), crude protein (CP) and starch degradability. Physical (bulk density, milling ratio, percentage of floating grains, apparent density) and chemical (tannins, CP and kafirins contents) characteristics were related to ruminal degradability of sorghum grains in order to identify predictors for ruminal degradation. Differences in DM, CP and starch degradability in situ between sorghum hybrids were found after 16 h of incubation. Physical characteristics were not related to in situ DM, CP and starch degradability. However, tannins and kafirins contents were related to DM, CP and starch degradability. Degradability of sorghum grain was highly dependent on genotype and tannin contents were the most reliable predictor of DM degradability. INTRODUCCIÓNEl grano de sorgo es uno de los cereales más cultivados en el mundo y constituye una parte importante de las dietas de bovinos en muchas regiones de Argentina. Dicho cereal presenta ventajas agronómicas en cuanto a su rusticidad y plasticidad que lo hace adaptable a un amplio rango de condiciones medioambientales, siendo más eficiente que el maíz en el uso del agua edáfica.El valor alimenticio del grano de sorgo puede ser afectado por las características del endospermo y el contenido de taninos. Se han hallado amplias diferencias en la degradabilidad entre híbridos de sorgo (Cabral Filho et al., 2005), debidas a variaciones en el contenido y la digestibilidad del almidón y a las cantidades y tipos de

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Ruminal fermentation and degradability of sorghum cultivar whole crop, and grains, using an in vitro gas production technique

Cited by 15 publications

References 15 publications

Energy efficiency of growing ram lambs fed concentrate-based diets with different roughage sources

Energy efficiency of growing ram lambs fed concentrate-based diets with different roughage sources

Desactivación de taninos en grano húmedo de sorgo con polietilenglicol o urea

Características físicas y químicas del grano de sorgo: Relación con la degradación ruminal en bovinos

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