DOI: 10.1017/s0021859600059207. Quantitative digestion of fresh herbage by sheep: II. The sites of digestion of some nitrogenous constituents

Quantitative digestion of fresh herbage by sheep: II. The sites of digestion of some nitrogenous constituents

10.1017/s0021859600059207

Crossref journal-article

Cambridge University Press (CUP)

The Journal of Agricultural Science (56)

Abstract

SummarySheep prepared either with a rumen cannula, or with a rumen cannula plus re-entrant cannulae in the duodenum and ileum were fed fresh ‘Ruanui’ perennial ryegrass (R), ‘Manawa’ short rotation ryegrass (M) and white clover (C) at dry-matter intakes ranging from 450 to 1000 g/24 h. Paper impregnated with chromic oxide was given once daily via the rumen fistula as a marker.Amounts of non-ammonia-nitrogen (NAN) entering and leaving the small intestine and nitrogen (N) excreted in the faeces were regressed against the intake of N for each sheep and these equations (all significant P < 0·05) were used to calculate the extent of digestion in the stomach, the small intestine and the large intestine at two levels of OM intake (500 and 800 g daily). Amino acid analyses of feed and digesta samples are also presented together with calculations of the apparent absorptions of individual amino acids from the small intestine.At an intake of 500 g OM amounts of NAN entering the small intestine were significantly greater (P < 0·05) in sheep given M than in sheep given R or C. At an intake of 800 g OM amounts in sheep given M were significantly greater (P < 0·01) than in sheep given R. NAN leaving the small intestine and N excreted in the faeces were similar for all three diets.At an intake of 800 g OM apparent absorptions of NAN from the small intestine of sheep given M (0·47 × N intake + 2·8 g/24 h) and sheep given C (0·51 × N intake – 1·3 g/24 h) were significantly greater (P < 0·01 and P < 0·05 respectively) than of sheep given R (0·41 × N intake – 0·5 g/24 h). As intake of herbage was increased the partition of digestion altered.Only small differences between herbages were found in the amino acid composition (g amino acid/100 g protein) of either duodenal or ileal digesta, but because of the large differences in the flows of NAN, the apparent absorptions of individual amino acids from the small intestine were much higher in sheep given M than in sheep given the other two species.The results are discussed in the light of available information on sites of digestion of herbage diets in sheep.

Bibliography

MacRae, J. C., & Ulyatt, M. J. (1974). Quantitative digestion of fresh herbage by sheep: II. The sites of digestion of some nitrogenous constituents. The Journal of Agricultural Science, 82(2), 309â319.

Authors 2

J. C. MacRae (first)
M. J. Ulyatt (additional)

References 24 Referenced 107

10.1071/AR9680567
{'key': 'S0021859600059207_ref020', 'article-title': 'Quantitative aspects of fermentation in the gastro-intestinal tract of sheep fed fresh herbage', 'volume': '33', 'author': 'Ulyatt', 'year': '1973', 'journal-title': 'Proceedings of the New Zealand Society of Animal Production'} / Proceedings of the New Zealand Society of Animal Production / Quantitative aspects of fermentation in the gastro-intestinal tract of sheep fed fresh herbage by Ulyatt (1973)
{'key': 'S0021859600059207_ref017', 'first-page': '102', 'article-title': 'The utilization of perennial ryegrass and white clover by young sheep', 'volume': '29', 'author': 'Rattray', 'year': '1969', 'journal-title': 'Proceedings of the New Zealand Society of Animal Production'} / Proceedings of the New Zealand Society of Animal Production / The utilization of perennial ryegrass and white clover by young sheep by Rattray (1969)
10.1079/BJN19720067
{'key': 'S0021859600059207_ref015', 'first-page': '59A', 'article-title': 'Partition of energy and nitrogen digestion in sheep fed fresh pasture species', 'volume': '31', 'author': 'MacRae', 'year': '1972', 'journal-title': 'Proceedings of the Nutrition Society'} / Proceedings of the Nutrition Society / Partition of energy and nitrogen digestion in sheep fed fresh pasture species by MacRae (1972)
10.1080/00288233.1970.10421196
10.1017/S002185960001546X
{'key': 'S0021859600059207_ref013', 'first-page': '127', 'volume-title': 'Digestive Physiology and Nutrition of the Ruminant', 'author': 'Lewis', 'year': '1961'} / Digestive Physiology and Nutrition of the Ruminant by Lewis (1961)
10.1071/AR9690925
10.1071/AR9690347
{'key': 'S0021859600059207_ref021', 'first-page': '74', 'article-title': 'The sites of digestion of fresh pasture species in the gastro-intestinal tracts of sheep', 'volume': '31', 'author': 'Ulyatt', 'year': '1971', 'journal-title': 'Proceedings of the New Zealand Society of Animal Production'} / Proceedings of the New Zealand Society of Animal Production / The sites of digestion of fresh pasture species in the gastro-intestinal tracts of sheep by Ulyatt (1971)
10.1071/AR9670973
10.1071/AR9650179
10.1079/BJN19720045
10.1098/rspb.1966.0085
10.1080/00288233.1971.10427100
{'key': 'S0021859600059207_ref012', 'first-page': '166', 'article-title': 'Use of the comparative slaughter technique to estimate the nutritive value of pasture for hoggets', 'volume': '27', 'author': 'Joyce', 'year': '1967', 'journal-title': 'Proceedings of New Zealand Society of Animal Production'} / Proceedings of New Zealand Society of Animal Production / Use of the comparative slaughter technique to estimate the nutritive value of pasture for hoggets by Joyce (1967)
Bryant A. M. (1971). The effect of freezing and thawing on the nutritive value of pasture herbage. In Research in N.Z. Department of Agriculture, Annual Report of Research Divisions 1970–71, p. 50.
{'key': 'S0021859600059207_ref001', 'first-page': '86A', 'article-title': 'The effects of drying and the comminution of red clover on its subsequent digestion by sheep', 'volume': '30', 'author': 'Beever', 'year': '1971', 'journal-title': 'Proceedings of the Nutrition Society'} / Proceedings of the Nutrition Society / The effects of drying and the comminution of red clover on its subsequent digestion by sheep by Beever (1971)
10.1017/S0021859600059190
{'key': 'S0021859600059207_ref007', 'volume-title': 'Micro-diffusion Analysis and Volumetric Error', 'author': 'Conway', 'year': '1957'} / Micro-diffusion Analysis and Volumetric Error by Conway (1957)
10.1152/physrev.1938.18.1.109
{'key': 'S0021859600059207_ref002', 'first-page': '26A', 'article-title': 'Effects of drying grass on sites of its digestion in sheep', 'volume': '28', 'author': 'Beever', 'year': '1969', 'journal-title': 'Proceedings of the Nutrition Society'} / Proceedings of the Nutrition Society / Effects of drying grass on sites of its digestion in sheep by Beever (1969)
{'key': 'S0021859600059207_ref003', 'first-page': '57', 'article-title': 'The release of plant cell contents and its relation to bloat', 'volume': '24', 'author': 'Bryant', 'year': '1964', 'journal-title': 'Proceedings of New Zealand Society of Animal Production'} / Proceedings of New Zealand Society of Animal Production / The release of plant cell contents and its relation to bloat by Bryant (1964)

Dates

Type	When
Created	16 years, 5 months ago (March 30, 2009, 7:34 p.m.)
Deposited	6 years, 3 months ago (May 29, 2019, 1:28 p.m.)
Indexed	3 months ago (June 2, 2025, 11:30 a.m.)
Issued	51 years, 5 months ago (April 1, 1974)
Published	51 years, 5 months ago (April 1, 1974)
Published Online	16 years, 5 months ago (March 27, 2009)
Published Print	51 years, 5 months ago (April 1, 1974)

Funders 0

None

BibTeX

@article{MacRae_1974, title={Quantitative digestion of fresh herbage by sheep: II. The sites of digestion of some nitrogenous constituents}, volume={82}, ISSN={1469-5146}, url={http://dx.doi.org/10.1017/s0021859600059207}, DOI={10.1017/s0021859600059207}, number={2}, journal={The Journal of Agricultural Science}, publisher={Cambridge University Press (CUP)}, author={MacRae, J. C. and Ulyatt, M. J.}, year={1974}, month=apr, pages={309–319} }

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