Digestible cell wall and undigested cellular contents of two grasses of low net energy value for growing cattle

Moir, K. W.

doi:10.1017/s0021859600055210

Cited by 2 publications

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References 9 publications

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“…Although differences in in vitro digested cell-wall values did not seem large enough to explain differences between pastures in terms of live-weight gain, relatively small differences might be important when there is synergism. For instance, standard forages used here were pangola and setaria with in vivo digestible cell-wall values of 41 and 37 % of forage OM (from Moir, 19826). Their in vitro digested cell-wall values, in the same run as green leaf of pangola and setaria with in vitro values of around 40%, were, respectively, 34 and 31% of forage OM.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of pasture for beef cattle from measurements of cell wall in separated leaf and stem fractions

Moir

Ebersohn

1983

J. Agric. Sci.

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SUMMARYThree pastures, pangola–clover, setaria, and tropical grass–legume, were grazed for a 9-month period by 12 steers of initial live weight of 199 kg on each. For the first 5 months live-weight gains were, respectively, 1·2, 0·76 and 0·43 kg per day, mostly higher than could be expected for estimated dietary energy concentrations of 10·1, 8·9 and 8·7 MJ of metabolizable energy (ME) per kg of dry matter. The high live-weight gains were not explained satisfactorily by dry-matter intakes as measured from faeces voided and dietary digestible dry matter, but were possible if published values for the requirements of ME for growth and fattening were too high. Cell wall, in vitro digested cell wall and nitrogen in separated leaf and stem fractions were useful indices for evaluating pasture for grazing cattle, but they did not predict live-weight gain.

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Section: Discussionmentioning

confidence: 99%

Evaluation of pasture for beef cattle from measurements of cell wall in separated leaf and stem fractions

Moir

Ebersohn

1983

J. Agric. Sci.

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Location of sources of variation in forage digestibility

Moir

1984

J Sci Food Agric

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Data from tables of composition of animal feedstuffs in which there were entries for digestibility (digestible dry matter or digestible organic matter) and cell wall were classified into different categories-grass or legume, stage of growth, leaf or stem, and forage species. No conclusions were drawn about legumes, because of insufficient data. After removing the effect of different categories, all the grass species behaved similarly with respect to digested cell walls, In contrast, within-species variation in digested cell walls was large, as shown by the high residual standard deviation of k4.0 in a simple linear regression of in-vivo digestibility on cell-wall content. There was a small effect which was due to the lignin content of the cell wall, but the source of most of the variation was not located. While it remains undiscovered, there is a danger that experiments involving forage might merely be testing the effect of treatment on random variation in the digested cell wall.

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Digestible cell wall and undigested cellular contents of two grasses of low net energy value for growing cattle

Cited by 2 publications

References 9 publications

Evaluation of pasture for beef cattle from measurements of cell wall in separated leaf and stem fractions

Evaluation of pasture for beef cattle from measurements of cell wall in separated leaf and stem fractions

Location of sources of variation in forage digestibility

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