Diet quality of cattle grazing grass or leucaena-grass pastures in Central Qld

Buck, Stuart, Thornton, Craig and Dixon, Rob (2011). Diet quality of cattle grazing grass or leucaena-grass pastures in Central Qld. In: Northern Beef Research Update Conference (NBRUC 2011), Darwin, Australia, (151-151). 3-4 August 2011.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ267431.pdf UQ267431.pdf application/pdf 7.76MB 0
Author Buck, Stuart
Thornton, Craig
Dixon, Rob
Title of paper Diet quality of cattle grazing grass or leucaena-grass pastures in Central Qld
Conference name Northern Beef Research Update Conference (NBRUC 2011)
Conference location Darwin, Australia
Conference dates 3-4 August 2011
Convener North Australia Beef Research Council
Place of Publication Park Ridge, QLD, Australia
Publisher North Australia Beef Research Council
Publication Year 2011
Sub-type Published abstract
Start page 151
End page 151
Total pages 1
Collection year 2011
Language eng
Formatted Abstract/Summary Introduction Beef production from Leucaena-grass pasture can be double that from grass-only pasture due to both increased amount and nutritive value of the forage. However limited information is available on diet selection and nutrient intake of cattle grazing Leucaena-grass or grass-only pastures.

Methods Two drafts of weaner cattle grazed paddocks of either nominally buffel grass (n = 8 and 5) or a Leucaena-buffel grass pasture (n = 9 and 25) on the Brigalow Research Station in central Qld from May 2008 to May 2009 and June 2009 to June 2010 respectively. Faecal samples collected each 6 weeks were analysed by faecal NIR spectroscopy to measure diet selection and quality.

Results In the buffel pasture diet non grass was consistently <26%, and was likely woody browse species. Leucaena generally contributed 8-35% of the diet in the Leucaena-grass pasture during spring and summer, but increased to 83% during autumn when grass quality was rapidly declining. Similar seasonal changes in digestibility and crude protein occurred in both pastures. Digestibility was predominately >50%, and was consistently high (>65%) late summer in the Leucaena-grass pasture. Diet crude protein was likely limiting in cattle grazing the buffel grass between July to December 2009, but was not likely limiting in cattle grazing Leucaena-grass pasture.

Discussion and Conclusions In this study when stocking rate matched feed availability, beef production increased from 51kg/ha.yr on buffel to 103kg/ha.yr on Leucaena + buffel (Thornton and Buck 2011). This is attributable to an increased amount and nutritive value of the forage in Leucaena-grass pastures.
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Access Statistics: 96 Abstract Views, 0 File Downloads  -  Detailed Statistics
Created: Fri, 10 Feb 2012, 17:27:43 EST by Dr Robert Dixon on behalf of Qld Alliance for Agriculture and Food Innovation