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Rumen parameters and urea kinetics in goats and sheep

The effects of animal species and supplements on rumen fluid characteristics, plasma urea-N (PUN) concentration, plasma urea-N pool size, urea-N degradation in the gut and urea-N net flux (urea-N synthesis rate) were studied in goats and sheep, with some minor differences detected. The animals were...

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Main Authors:	Darlis, Abdullah, Norhani, Abd Halim, Mohd Ridzwan, Syed Salim, Syed Jalaludin, Ho, Yin Wan
Format:	Article
Language:	English English
Published:	Asian-Australasian Association of Animal Production Societies 2000
Online Access:	http://psasir.upm.edu.my/id/eprint/50061/1/Rumen%20parameters%20and%20urea%20kinetics%20in%20goats%20and%20sheep.pdf http://psasir.upm.edu.my/id/eprint/50061/7/13-128.pdf
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spelling	oai:psasir.upm.edu.my:50061 http://psasir.upm.edu.my/id/eprint/50061/ Rumen parameters and urea kinetics in goats and sheep Darlis Abdullah, Norhani Abd Halim, Mohd Ridzwan Syed Salim, Syed Jalaludin Ho, Yin Wan The effects of animal species and supplements on rumen fluid characteristics, plasma urea-N (PUN) concentration, plasma urea-N pool size, urea-N degradation in the gut and urea-N net flux (urea-N synthesis rate) were studied in goats and sheep, with some minor differences detected. The animals were fed either chopped rice straw ad libitum+200 g soybean meal (SBM), or chopped rice straw ad libitum+190 g soybean meal+300 g sago meal (SBM+SM) for 14 days. The supplements were isonitrogenous (80 g crude protein/animal/d). [14C]-urea was used as the marker for urea metabolism studies. Two animals from each species were fed either supplement in a cross-over design in two periods. The results showed that rumen pH was significantly (p<0.001) lower in animals fed SBM+SM than those fed SBM supplement. The ammonia concentrations of rumen fluid were significantly (p<0.01) higher in sheep (382.9 mg N/L) than goats (363.1 mg N/L) when fed SBM supplement but lower (282.5 mg N/L) than that of goats (311.0 mg N/L) when fed SBM+SM supplement. Total VFA concentrations were significantly (p<0.05) higher in animals fed SBM+SM supplement than those fed SBM supplement. Goats had significantly (p<0.01) higher molar proportions of acetate (79.1, 77.7%, respectively) than sheep (75.8, 74.0%, respectively) in both supplements. The molar proportion of acetate was significantly (p<0.05) higher, while that of butyrate lower in animals fed SBM supplement than those fed SBM+SM supplement. In animals fed SBM supplement, the molar proportion of propionate was significantly (p<0.01) higher in sheep (18.0%) than in goats (15.6%), but in animals fed SBM+SM, the molar proportion of butyrate was significantly (p<0.01) higher (9.6%) in sheep than in goats (7.2%). Plasma urea-N concentration, plasma urea-N pool size, urea-N degradation in the gut, urea-N net flux and the fraction of urea-C from the blood entering the rumen were not significantly different between goats and sheep fed either supplement. However, PUN concentration was significantly (p<0.05) lower in animals fed SBM+SM supplement (average of 13.8 mg N/100 ml) than in those fed SBM supplement (average of 16.5 mg N/100 ml). The urea net flux was significantly (p<0.05) higher in goats (average of 14.5 g N/d) than sheep (average of 12.9 g N/d), and animals fed SBM supplement showed higher (average of 14.9 g N/d) urea net flux than animals fed SBM+SM supplement (average of 12.9 g N/d) A significant (p<0.05) positive correlation was observed between urea-N net flux and urea-N degradation; urea-N net flux and pool size; urea-N net flux and urea excretion in the urine; and PUN and rumen ammonia in goats. While in sheep, significant (p<0.05) positive correlation was observed between urea-N net flux and urea excretion in the urine; and PUN and rumen ammonia. Asian-Australasian Association of Animal Production Societies 2000 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/50061/1/Rumen%20parameters%20and%20urea%20kinetics%20in%20goats%20and%20sheep.pdf text en http://psasir.upm.edu.my/id/eprint/50061/7/13-128.pdf Darlis and Abdullah, Norhani and Abd Halim, Mohd Ridzwan and Syed Salim, Syed Jalaludin and Ho, Yin Wan (2000) Rumen parameters and urea kinetics in goats and sheep. Asian-Australasian Journal of Animal Sciences, 13 (7). pp. 922-928. ISSN 1011-2367; ESSN: 1976-5517 http://www.ajas.info/journal/view.php?number=19669 10.5713/ajas.2000.922
institution	UPM IR
collection	UPM IR
language	English English
description	The effects of animal species and supplements on rumen fluid characteristics, plasma urea-N (PUN) concentration, plasma urea-N pool size, urea-N degradation in the gut and urea-N net flux (urea-N synthesis rate) were studied in goats and sheep, with some minor differences detected. The animals were fed either chopped rice straw ad libitum+200 g soybean meal (SBM), or chopped rice straw ad libitum+190 g soybean meal+300 g sago meal (SBM+SM) for 14 days. The supplements were isonitrogenous (80 g crude protein/animal/d). [14C]-urea was used as the marker for urea metabolism studies. Two animals from each species were fed either supplement in a cross-over design in two periods. The results showed that rumen pH was significantly (p<0.001) lower in animals fed SBM+SM than those fed SBM supplement. The ammonia concentrations of rumen fluid were significantly (p<0.01) higher in sheep (382.9 mg N/L) than goats (363.1 mg N/L) when fed SBM supplement but lower (282.5 mg N/L) than that of goats (311.0 mg N/L) when fed SBM+SM supplement. Total VFA concentrations were significantly (p<0.05) higher in animals fed SBM+SM supplement than those fed SBM supplement. Goats had significantly (p<0.01) higher molar proportions of acetate (79.1, 77.7%, respectively) than sheep (75.8, 74.0%, respectively) in both supplements. The molar proportion of acetate was significantly (p<0.05) higher, while that of butyrate lower in animals fed SBM supplement than those fed SBM+SM supplement. In animals fed SBM supplement, the molar proportion of propionate was significantly (p<0.01) higher in sheep (18.0%) than in goats (15.6%), but in animals fed SBM+SM, the molar proportion of butyrate was significantly (p<0.01) higher (9.6%) in sheep than in goats (7.2%). Plasma urea-N concentration, plasma urea-N pool size, urea-N degradation in the gut, urea-N net flux and the fraction of urea-C from the blood entering the rumen were not significantly different between goats and sheep fed either supplement. However, PUN concentration was significantly (p<0.05) lower in animals fed SBM+SM supplement (average of 13.8 mg N/100 ml) than in those fed SBM supplement (average of 16.5 mg N/100 ml). The urea net flux was significantly (p<0.05) higher in goats (average of 14.5 g N/d) than sheep (average of 12.9 g N/d), and animals fed SBM supplement showed higher (average of 14.9 g N/d) urea net flux than animals fed SBM+SM supplement (average of 12.9 g N/d) A significant (p<0.05) positive correlation was observed between urea-N net flux and urea-N degradation; urea-N net flux and pool size; urea-N net flux and urea excretion in the urine; and PUN and rumen ammonia in goats. While in sheep, significant (p<0.05) positive correlation was observed between urea-N net flux and urea excretion in the urine; and PUN and rumen ammonia.
format	Article
author	Darlis Abdullah, Norhani Abd Halim, Mohd Ridzwan Syed Salim, Syed Jalaludin Ho, Yin Wan
spellingShingle	Darlis Abdullah, Norhani Abd Halim, Mohd Ridzwan Syed Salim, Syed Jalaludin Ho, Yin Wan Rumen parameters and urea kinetics in goats and sheep
author_facet	Darlis Abdullah, Norhani Abd Halim, Mohd Ridzwan Syed Salim, Syed Jalaludin Ho, Yin Wan
author_sort	Darlis
title	Rumen parameters and urea kinetics in goats and sheep
title_short	Rumen parameters and urea kinetics in goats and sheep
title_full	Rumen parameters and urea kinetics in goats and sheep
title_fullStr	Rumen parameters and urea kinetics in goats and sheep
title_full_unstemmed	Rumen parameters and urea kinetics in goats and sheep
title_sort	rumen parameters and urea kinetics in goats and sheep
publisher	Asian-Australasian Association of Animal Production Societies
publishDate	2000
url	http://psasir.upm.edu.my/id/eprint/50061/1/Rumen%20parameters%20and%20urea%20kinetics%20in%20goats%20and%20sheep.pdf http://psasir.upm.edu.my/id/eprint/50061/7/13-128.pdf
_version_	1819297011731529728
score	13.4562235

Rumen parameters and urea kinetics in goats and sheep

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