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Chemical composition, intake, apparent digestibility and nylon-bag disappearance of leaf and stem fractions from straw of four barley genotypes

Published online by Cambridge University Press:  02 September 2010

F. Herbert  and
E. F. Thomson
F. Herbert
Affiliation:
International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
E. F. Thomson
Affiliation:
International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
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Abstract

Four experiments examined the chemical composition, intake, dry matter (DDM) and organic matter (DOM) apparent digestibilities and rates of disappearance from nylon bags of hand-separated leaf and stem fractions of straw from four genotypes of barley: Arabi Abiad, Beecher, C63 and ER/Apam. In experiment 1, 900 g leaf from each genotype was offered to three or four wethers together with 200 g soya-bean meal (SBM), and in experiment 2 the leaf from the same four genotypes was offered ad libitum with 200 g SBM. In experiment 3, 500 g stem from Arabi Abiad and Beecher was offered with 100 g SBM to six wethers in two groups. Experiment 4 measured the rate and extent of disappearance of the leaf and stem fractions from nylon bags incubated in the rumen of wethers. The genotypes had widely contrasting morphological characteristics. Stems contained about half as much ash and crude protein as leaves and differences within fractions were small. The leaf and stem fractions of the two-rowed barleys Abiad and Apam contained less modified acid-detergent fibre than the six-rowed Beecher and C63 genotypes.

When leaf was offered with SBM, both restrictedly and ad libitum, the DDM and DOM of this fraction were similar between genotypes (P > 0·05) and in experiment 2 the intake of leaf was also similar between genotypes (P > 0·05). The apparent digestibility of stem differed significantly between Arabi Abiad and Beecher in experiment 3 (P < 0·05). Significant differences were apparent between genotypes in the extent and rate of disappearance of leaf and stem from nylon bags after 48 h incubation in the rumen.

Keywords

barley strawdigestibilitynutritive value
Type
Research Article
Information
Animal Production , Volume 55 , Issue 3 , December 1992 , pp. 407 - 412
Copyright
Copyright © British Society of Animal Science 1992

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References

Agricultural Research Council. 1984. The nutrient requirements of ruminant livestock. Supplement no. 1. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Åman, P. and Nordkvist, E. 1983. Chemical composition and in vitro degradability of botanical fractions of cereal straw. Swedish Journal of Agricultural Research 13: 61–67.Google Scholar
Capper, B. S., Thomson, E. F. and Rihawi, S. 1989. Voluntary intake and digestibility of barley straw as influenced by variety and supplementation with either barley grain or cotton seed cake. Animal Feed Science and Technology 26: 105–118.Google Scholar
Capper, B. S., Thomson, E. F., Rihawi, S., Termanini, A. and Macrae, R. 1986. The feeding value of straw from different genotypes of barley when given to Awassi sheep. Animal Production 42: 337–342.Google Scholar
Galletti, G. ed. 1991. Production and utilization of lignocellulosics: plant refinery and breeding, analysis, feeding to herbivores, and economical aspects. COST 84 bis Workshop, Bolognia. Elsevier, London.Google Scholar
International Center for Agricultural Research in the Dry Areas (ICARDA). 1988. Pasture, Forag e and Livestock Program. Annual Report 1987, ICARDA, Aleppo. ICARDA-129, pp. 89–95.Google Scholar
International Center for Agricultural Research in the Dry Areas (ICARDA). 1989. Pasture, Forage and Livestock Program. Annual Report 1988, ICARDA, Aleppo, ICARDA-144, pp. 243–254.Google Scholar
Laredo, M. A. and Minson, D. J. 1973. The voluntary intake, digestibility, and retention time by sheep of leaf and stem fractions of five grasses. Australian Journal of Agricultural Research 24: 875–888.Google Scholar
Ministry of Agriculture, Fisheries and Food. 1973. The analysis of agricultural materials. Technical Bulletin 27. Her Majesty's Stationery Office, London.Google Scholar
Ministry of Agriculture, Fisheries and Food. 1981. The analysis of agricultural materials. Technical Bulletin RB427. Her Majesty's Stationery Office, London.Google Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1984. Energy allowances and feeding systems for ruminants. Reference Book 433. Her Majesty's Stationery Office, London.Google Scholar
Ørskov, E. R., Hovell, F. D. DeB. and Mould, F. 1980. The use of the nylon bag technique for the evaluation of feedstuffs. Tropical Animal Production 5: 195–213.Google Scholar
Poppi, D. P., Minson, D. J. and Ternouth, J. H. 1981. Studies of cattle and sheep eating leaf and stem fractions of grasses. I. The voluntary intake, digestibility and retention time in the reticulo-rumen. Australian Journal of Agricultural Research 32: 99–108.Google Scholar
Ramanzin, M., Ørskov, E. R. and Tuah, A. K. 1986. Rumen degradation of straw. 2. Botanical fractions of straw from two barley cultivars. Animal Production 43: 271–278.Google Scholar
Reid, J. D., Capper, B. S. and Neate, P. J. H. ed. 1988. Plant breeding and the nutritive value of crop residues. International Livestock Centre for Africa, Addis Ababa.Google Scholar