The effect of grain species, processing and time of feeding on the efficiency of feed utilization and microbial protein synthesis in sheep

Horadagoda, A.; Fulkerson, WJ; Barchia, I.; Dobos, Robin; Nandra, K. S.

doi:10.1016/j.livsci.2007.04.016

Cited by 15 publications

(7 citation statements)

References 26 publications

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“…Grain processing can affect rumen fermentation (Ferreira et al, 2007;Horadagoda et al, 2008) and starch digestibility (Theurer et al, 1999;Callison et al, 2001;Rémond et al, 2004). Lesmeister and Heinrichs (2004) reported that steam flaked corn stimulated the development of rumen mucosa compared with rolled and whole corn in neonatal calves.…”

Section: Introductionmentioning

confidence: 99%

Effect of corn particle size on mucosal morphology and digesta pH of the gastrointestinal tract in growing goats

Yan

Hao

et al. 2009

Livestock Science

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Section: Introductionmentioning

confidence: 99%

Effect of corn particle size on mucosal morphology and digesta pH of the gastrointestinal tract in growing goats

Yan

Hao

et al. 2009

Livestock Science

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“…The rumen fermentation coefficients: effective degradability, content of rapidly soluble fraction and rate of degradation in the rumen of insoluble fraction estimated for barley ground to particle size of 5.7 mm were lower in comparison with analogous coefficients determined for barley ground to particle size of 1.0 mm. Lower effective rumen degradability of organic matter and protein of cracked barley or whole barley compared to finely ground barley was estimated by Horadagoda et al (2008) in an experiment with cannulated sheep. This is consistent with previous results, which indicated that with a decreasing particle size the ruminal solubility and disappearance rate of barley DM and CP increased (Beauchemin et al, 2001;Bengochea et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Effect of carbohydrates in grass silage-based diets on in sacco ruminal degradability of barley (Hordeum vulgare L. cv. Lomerit) grain ground to different particle sizes

Niwińska¹

2009

CZECH J ANIM SCI

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The rate and extent of rumen digestion are influenced by the complementarity of the release of N and energy compounds that has an effect on the ruminal microbial population (Rotger et al., 2006). The diet based on grass silage is characterized by a high level of rapidly degraded crude protein, creating an asynchronous relationship between the availability of protein and energy (Givens and Rulquin, 2004). In the meta-analysis of data reporting the true digestibility of N for the gastrointestinal tract AbstrAct: The effect of carbohydrates included in grass silage-based diets on in sacco degradability of dry matter (DM), crude protein (CP), neutral detergent fibre (NDF) and cellulose (CE) of barley (Hordeum vulgare L. cv. Lomerit) grain ground to different particle sizes was studied using 3 ruminally cannulated cows. The measurements were carried out as a 3 × 2 Latin square design with treatments being carbohydrates in the concentrate portion of diets (starch in diet I vs. pectin in diet II vs. sucrose in diet III) and particle size of ground barley grain (1.0 vs. 5.7 mm). The diet synchronization index between N and energy supply during the day was an average of 0.8. The rumen degradability of barley grain compounds was influenced by the type of carbohydrates included in grass silage-based diets. Higher rumen degradation rates (P < 0.05) of barley CP, NDF and CE after 8 h of incubation and of CP and CE after 16 h of incubation were found in the rumen of cows receiving the diet containing sucrose compared with degradation rates found in the rumen of cows receiving the diet containing pectin or starch. The effective degradability of DM, CP, NDF and CE of barley grain in the rumen of cows receiving diets I, II and III was similar (77, 74, 39 and 41%, respectively). Replacing barley starch or beet pulp pectin with molasses sucrose in the grass silage-based diet resulted in the higher rate of barley CP, NDF and CE degradation after 8 h of incubation and of CP and CE after 16 h of incubation. It seems that the energy availability from carbohydrates affected the ruminal microbial activity as a consequence of the degradation rate of substrates. Higher (P < 0.01) rumen degradability of CP, NDF and CE after 2, 4, 8, 16 and 24 h of incubation was estimated for 1.0 mm particle size in comparison with that found for grain ground to 5.7 mm particle size, and the degradability of CP after 48 h of incubation was not different (P > 0.05). The degradability of barley grain CP, NDF and CE during incubation time was not influenced by the diet composition by particle size interaction (P > 0.05). The increase in barley grain particle size from 1.0 to 5.7 mm slowed down the rumen digestion of barley DM, CP, NDF and CE, probably due to restricted access to microbial digestion.

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“…However, there is little information about the inclusion of sorghum grain in the diet of ruminants grazing on temperate pastures. Horadagoda et al (2008) found low rumen pH, NH 3 -N concentrations and high microbial protein synthesis when using sorghum as a supplement of a rye grass hay. The aim of this study was to evaluate the effect of sorghum grain (Sorghum bicolor) supplementation on ruminal pH and NH 3 -N concentration of wethers consuming a fresh temperate pasture (Lotus corniculatus).…”

Section: Introductionmentioning

confidence: 88%

Rumen pH and NH3-N concentration of sheep fed temperate pastures supplemented with sorghum grain

Aguerre¹,

Repetto²,

Pérez-Ruchel³

et al. 2010

SA J. An. Sci.

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The aim of this study was to evaluate the effect of sorghum grain supplementation on ruminal pH and NH 3 -N concentration of wethers consuming a fresh temperate pasture (Lotus corniculatus) in metabolism cages. Sixteen Corriedale x Milchschaf wethers were fed temperate pastures ad libitum and were nonsupplemented or supplemented with ground sorghum grain at 5, 10 or 15 g/kg of their body weight (BW). Rumen fluid samples were collected at 0, 1, 2, 3, 4, 5 and 6 h after supplementation through permanent tubes inserted in the rumen. Ruminal pH was measured immediately and NH 3 -N concentration was determined by direct distillation. Mean daily pH values for non-supplemented wethers and supplemented with 5, 10 and 15 g/kg of their BW were 6.45, 6.14, 6.09 and 5.43, respectively. Significant differences in pH were found between the 15 g/kg supplemented group and non-supplemented, 5 and 10 g/kg supplemented groups, while a trend was found between non-supplemented and 10 g/kg supplemented group. After 0 h, all mean pH values for the non-supplemented group were above 6.15, while values for the 10 and 15 g/kg supplemented groups were below 6.2 and 6.0, respectively. No differences in NH 3 -N concentration among groups (mean = 37.15 mg/100 mL), between time or interaction between time and treatment were found. There was a correlation between pH and NH 3 -N when all measurements were considered. Ground sorghum grain supplementation significantly reduced rumen pH when 15 g/kg of BW was provided to wethers fed temperate pastures, but it did not affect NH 3 -N concentration. _______________________________________________________________________________________

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The effect of grain species, processing and time of feeding on the efficiency of feed utilization and microbial protein synthesis in sheep

Cited by 15 publications

References 26 publications

Effect of corn particle size on mucosal morphology and digesta pH of the gastrointestinal tract in growing goats

Effect of corn particle size on mucosal morphology and digesta pH of the gastrointestinal tract in growing goats

Effect of carbohydrates in grass silage-based diets on in sacco ruminal degradability of barley (Hordeum vulgare L. cv. Lomerit) grain ground to different particle sizes

Rumen pH and NH3-N concentration of sheep fed temperate pastures supplemented with sorghum grain

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