The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
The effect of feed intake and body weight on purine derivative excretion and microbial protein supply in sheep1
Abstract
Urinary excretion of purine derivatives (PD) was used to estimate the microbial N (MN) supply to sheep in three experiments designed to examine the effects of DMI and BW on the efficiency of microbial N supply (EMNS) to the host animal. In Exp. 1, four sheep of about 45 kg BW were given 328, 656, 984, and 1313 g of DM/d of a hay/concentrate diet in a Latin square design. Excretion of PD per kilogram of digestible organic matter intake (DOMI) increased with intake, and EMNS increased from 12.0 to 28.3 g of MN/kg of OM digested in the rumen (DOMR). In Exp. 2, 19 sheep ranging from 22 to 73 kg BW were all offered 820 g of DM/d of the same diet as that fed in Exp. 1. Although DM digestibility was relatively constant, PD excretion varied from 4.5 to 13.5 mmol/d and EMNS from 8 to 36 g of MN/kg of DOMR, both inversely related to animal BW. In Exp. 3, five sheep of 48 to 57 kg BW were given a different diet at 702, 966, or 1,237 g of DM/d. Purine derivative excretion per kilogram of DOMI increased with the DMI:BW ratio. Calculated EMNS ranged from 23 to 35 g of MN/kg of DOMR. Pooled data from all experiments showed EMNS to be related to the DMI:BW ratio. It is suggested that the DMI:BW ratio defines the ruminal digesta passage rate and hence outflow of microbial protein. The results imply that the EMNS for a given diet is not constant, but changes with intake.
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In the citing paper
“Chen et al. (1992) noted that the apparent digestibility of DM and OM decreases as DM intake increases or as retention time decreases and rate of passage increases (Mertens and Ely, 1982).”
From Effects of feeding corn silage inoculated with microbial additives on the ruminal fermentation, microbial protein yield, and growth performance of lambs1 (2014) · cites this paper as Chen et al., 1992
In the citing paper
“Chen et al. (1992) reported that increasing DM intake may increase microbial N supply.”
From Effects of feeding corn silage inoculated with microbial additives on the ruminal fermentation, microbial protein yield, and growth performance of lambs1 (2014) · cites this paper as Chen et al. (1992)
In the citing paper
“As reported by Chen et al. (1992), this is likely a response to the increase in intake, because there are linear negative relationships between intake and digestibility in lambs.”
From Effects of feeding corn silage inoculated with microbial additives on the ruminal fermentation, microbial protein yield, and growth performance of lambs1 (2014) · cites this paper as Chen et al., 1992
Citations
Cites
Investigation of chromium, cerium and cobalt as markers in digesta. Rate of passage studies
Uden, P. C., Colucci, P. E., & Soest, P. J. V. (1980) · Journal of the Science of Food and Agriculture · doi:10.1002/jsfa.2740310702 · Cited by 1,420
A RAPID PROCEDURE FOR PURINE MEASUREMENT AND ITS USE FOR ESTIMATING NET RUMINAL PROTEIN SYNTHESIS
Zinn, R. A., & Owens, F. N. (1986) · Canadian Journal of Animal Science · doi:10.4141/cjas86-017 · Cited by 821
Balcells, J., Guada, J. A., Castrillo, C., & Gasa, J. (1991) · The Journal of Agricultural Science · doi:10.1017/s002185960007773x · Cited by 145
Measurement of purine derivatives in urine of ruminants using automated methods
Chen, X. B., Mathieson, J. G., Hovell, F. D. D., & Reeds, P. J. (1990) · Journal of the Science of Food and Agriculture · doi:10.1002/jsfa.2740530104 · Cited by 87
Renal clearance of plasma allantoin in sheep
Chen, X., Kyle, D. J., Ørskov, E. R., & Hovell, F. (1991) · Experimental Physiology · doi:10.1113/expphysiol.1991.sp003481 · Cited by 36
Cited by
Sorted by citations
Chen, X., & Gomes, M. J. (1995) · Cited by 1,142
Lee, C., Hristov, A. N., Cassidy, T. W., Heyler, K. S., Lapierre, H., Varga, G. A., de Veth, M. J., Patton, R. A., & Parys, C. (2012) · Journal of Dairy Science · doi:10.3168/jds.2012-5581 · Cited by 285
Low-methane yield sheep have smaller rumens and shorter rumen retention time
Goopy, J. P., Donaldson, A., Hegarty, R., Vercoe, P. E., Haynes, F., Barnett, M., & Oddy, V. H. (2014) · British Journal Of Nutrition · doi:10.1017/s0007114513002936 · Cited by 230
“Urinary purine excretion is used as an index of rumen microbial protein production((17)).”
MethodAgle, M., Hristov, A. N., Zaman, S., Schneider, C., Ndegwa, P. M., & Vaddella, V. (2010) · Journal of Dairy Science · doi:10.3168/jds.2009-2977 · Cited by 180
“83 for microbial purines (Chen et al., 1992).”
BackgroundChen, X., Mejia, A. T., Kyle, D. J., & Ørskov, E. R. (1995) · The Journal of Agricultural Science · doi:10.1017/s002185960007458x · Cited by 154
Metadata
- Authors
- Chen, X. B., Chen, Y. K., Franklin, M. F., Ørskov, E. R., & Shand, W. J.
- Affiliations
- University of Aberdeen (GB)
- Venue
- Journal of Animal Science
- Publisher
- Oxford University Press (OUP)
- Published
- 1992-05-01
- Volume
- 70
- Issue
- 5
- Pages
- 1534-1542
- ISSN
- 0021-8812 (ISSN-L)
- 1525-3163
- OpenAlex
- W274450734
- Cited by
- 260
- References
- 5
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 10 · 2023: 7 · 2022: 11 · 2021: 11 · 2020: 7 · 2019: 7 · 2018: 6 · 2017: 14 · 2016: 8 · 2015: 2 · 2014: 8 · 2013: 9 · 2012: 13
- FWCI
- 16.81
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Animal Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Health
- Keywords
- purine derivatives, microbial protein supply, sheep, dry matter intake, body weight, urinary excretion, rumen nitrogen
- MeSH terms
- Allantoin, Animals, Bacterial Proteins, Body Weight, Digestion, Eating, Female, Hypoxanthines, Male, Purines, Rumen, Sheep, Uric Acid, Xanthines, Hypoxanthine, Xanthine
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