Alteration of Supplement Nitrogen-Sulfur Ratio by Increasing Sulfate Supplementation Affects the Rate Rather Than the Extent of Fiber Degradation in Cattle Fed a Matured Tropical Grass Hay

Morrison, M, Boniface, AN and Murray, RM (1994) Alteration of Supplement Nitrogen-Sulfur Ratio by Increasing Sulfate Supplementation Affects the Rate Rather Than the Extent of Fiber Degradation in Cattle Fed a Matured Tropical Grass Hay. Journal of the Science of Food and Agriculture, 65 4: 449-455. doi:10.1002/jsfa.2740650413


Author Morrison, M
Boniface, AN
Murray, RM
Title Alteration of Supplement Nitrogen-Sulfur Ratio by Increasing Sulfate Supplementation Affects the Rate Rather Than the Extent of Fiber Degradation in Cattle Fed a Matured Tropical Grass Hay
Journal name Journal of the Science of Food and Agriculture   Check publisher's open access policy
ISSN 0022-5142
Publication date 1994-08-01
Year available 1994
Sub-type Article (original research)
DOI 10.1002/jsfa.2740650413
Open Access Status Not yet assessed
Volume 65
Issue 4
Start page 449
End page 455
Total pages 7
Place of publication W SUSSEX
Publisher JOHN WILEY & SONS LTD
Language eng
Abstract There is a need to understand how supplement N : S ratios can affect ruminal fermentation and ultimately, nutrient supply, in grazing animals. The following experiment was undertaken to describe the effect(s) of supplement N : S ratios upon the rate and extent of ruminal degradation of poor quality native pasture hay. Four rumen fistulated Brahman x Shorthorn (Droughtmaster) steers, fed chopped Black Spear Grass hay, received either no intraruminal supplement, or urea plus sodium sulphate to give supplement N : S ratios of 23 : 1, 16: 1, 11.5: 1, 10: 1 and 4: 1. The level of urea supplementation was kept constant and maintained rumen ammonia concentrations in excess of 100 mg litre(-1). No differences were observed in voluntary feed intake in response to different supplement N : S ratios. The extent of rumen fermentation as measured by the nylon bag technique and apparent organic matter digestibility in vivo were similar for supplement N : S ratios of 16 : 1 and lower, and total intake of digestible organic matter was maximal with a supplement N : S ratio of 10 : 1. Increasing levels of S supplementation were found to increase the rate of rumen fermentation.
Keyword Sulfur
Fiber Degradation
Cattle
Rumen Microbiology
Cell-Walls
Digestion
Sulfur
Ruminant
Protein
Fungi
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
 
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