Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle

Prediction equations based on urinary purine derivatives (PD) excretion rate as an index to predict rumen microbial protein production have been developed for European cattle and sheep. However, there is evidence to suggest that those equations may not be applicable directly to tropical swamp buf...

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Main Author:	Pimpa, Opart
Format:	Thesis
Language:	English English
Published:	2002
Subjects:	Microbial proteins - Buffaloes - Case studies Microbial proteins - Zebus - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/10580/1/FP_2002_7.pdf
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id	my-upm-ir.10580
record_format	uketd_dc
spelling	my-upm-ir.105802024-04-17T08:43:04Z Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle 2002-01 Pimpa, Opart Prediction equations based on urinary purine derivatives (PD) excretion rate as an index to predict rumen microbial protein production have been developed for European cattle and sheep. However, there is evidence to suggest that those equations may not be applicable directly to tropical swamp buffaloes (Bubalus bubalis) and zebu cattle (Bos indicus). To establish similar equations for the above two species of ruminant, five studies were conducted. In the first study, endogenous PD excretion rate determined by fasting procedure for swamp buffaloes and the Malaysian indegenous KK. cattle (zebu cattle) were 199 and 300 Ilmol/kgO.75 /day, respectively. Urinary PD excretion rate per kg digestible organic matter intake (DOMI) for buffaloes (8.19 mmol/kg DOMI) was significantly lower than that for KK. cattle (15.45 mmol/kg DOMI). The second study examined the relationship between daily urinary PD excretion (Y, mmol) and exogenous purine bases (PB) supply via duodenal infusion (X, mmol/day). The relationship obtained were Y = O. I 2X+ 12.78 (r2= 0.45) for buffaloes and Y = 0.85X + 7.15 (r2= 0.62) for KK. cattle, suggesting that 12% and 85% of the supplied exogenous purine were excreted in the urine of buffaloes and zebu cattle, respectively. In the third study, labelled [8_14C] uric acid marker was used to test the hypothesis that the lower recovery rate of urinary PD in swamp buffaloes was due to their higher recycling of plasma PD as compared to KK cattle. The averaged non-renal PD loss of plasma PD for swamp buffaloes and KK cattle did not differ significantly. Microbial proteins - Buffaloes - Case studies Microbial proteins - Zebus - Case studies 2002-01 Thesis http://psasir.upm.edu.my/id/eprint/10580/ http://psasir.upm.edu.my/id/eprint/10580/1/FP_2002_7.pdf text en public doctoral Universiti Putra Malaysia Microbial proteins - Buffaloes - Case studies Microbial proteins - Zebus - Case studies Faculty of Agriculture Liang, Juan Boo English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Liang, Juan Boo
topic	Microbial proteins - Buffaloes - Case studies Microbial proteins - Zebus - Case studies
spellingShingle	Microbial proteins - Buffaloes - Case studies Microbial proteins - Zebus - Case studies Pimpa, Opart Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
description	Prediction equations based on urinary purine derivatives (PD) excretion rate as an index to predict rumen microbial protein production have been developed for European cattle and sheep. However, there is evidence to suggest that those equations may not be applicable directly to tropical swamp buffaloes (Bubalus bubalis) and zebu cattle (Bos indicus). To establish similar equations for the above two species of ruminant, five studies were conducted. In the first study, endogenous PD excretion rate determined by fasting procedure for swamp buffaloes and the Malaysian indegenous KK. cattle (zebu cattle) were 199 and 300 Ilmol/kgO.75 /day, respectively. Urinary PD excretion rate per kg digestible organic matter intake (DOMI) for buffaloes (8.19 mmol/kg DOMI) was significantly lower than that for KK. cattle (15.45 mmol/kg DOMI). The second study examined the relationship between daily urinary PD excretion (Y, mmol) and exogenous purine bases (PB) supply via duodenal infusion (X, mmol/day). The relationship obtained were Y = O. I 2X+ 12.78 (r2= 0.45) for buffaloes and Y = 0.85X + 7.15 (r2= 0.62) for KK. cattle, suggesting that 12% and 85% of the supplied exogenous purine were excreted in the urine of buffaloes and zebu cattle, respectively. In the third study, labelled [8_14C] uric acid marker was used to test the hypothesis that the lower recovery rate of urinary PD in swamp buffaloes was due to their higher recycling of plasma PD as compared to KK cattle. The averaged non-renal PD loss of plasma PD for swamp buffaloes and KK cattle did not differ significantly.
format	Thesis
qualification_level	Doctorate
author	Pimpa, Opart
author_facet	Pimpa, Opart
author_sort	Pimpa, Opart
title	Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
title_short	Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
title_full	Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
title_fullStr	Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
title_full_unstemmed	Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle
title_sort	urinary purine derivatives excretion as a method for estimation of rumen microbial protein production in swamp buffaloes and zebu cattle
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Agriculture
publishDate	2002
url	http://psasir.upm.edu.my/id/eprint/10580/1/FP_2002_7.pdf
_version_	1804888572370616320

Urinary Purine Derivatives Excretion as a Method for Estimation of Rumen Microbial Protein Production in Swamp Buffaloes and Zebu Cattle

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