
%0 Journal Article
%A Burke, J. L. 
%A Brookes, I. M. 
%A McNabb, W. C. 
%A Waghorn, G. C. 
%T The potential of sulla in pasture-based systems
%J Science Access
%D 2004/01/01
%V 1
%N 1
%P 25-28
%K liveweight gain, pasture, lucerne, sulla, condensed tannins, whole body protein synthesis
%R https://doi.org/10.1071/SA0401007
%U https://www.publish.csiro.au/paper/SA0401007 
%X A feed evaluation trial compared lamb growth, rumen function and protein synthesis from either pasture (perennial ryegrass (Lolium perenne)/white clover (Trifolium repens)-dominant), lucerne (Medicago sativa), sulla (Hedysarum coronarium, which contains condensed tannins (CT)) or a lucerne:sulla mixture. The 8 week trial involved 32 weaned ram lambs allocated to either pasture (80% ryegrass and 20% white clover), lucerne, sulla, or a 50:50 lucerne:sulla mixture (DM basis; 8 per diet). Measurements included feed intake, liveweight (LW) gain, rumen ammonia (NH3) and volatile fatty acid (VFA) concentrations. A sub-group of 16 lambs (4 from each treatment) were given a continuous infusion of 35S-cysteine and 35S-sulphate to measure the effect of diet on cysteine irreversible loss and absolute whole body protein synthesis (WBPS). Lambs fed pasture had the slowest (P<0.05) daily gains (116 g/day) and absolute WBPS (93 g/day) compared with lambs fed sulla (308 g LW and 152 g WBPS/day) or lucerne:sulla (281 g LW and 180 g WBPS/day). Lambs fed sulla had lower rumen NH3 concentrations (13.6 mmol/L), acetate:propionate ratios (2.6) and minor VFA concentrations (2.1%) suggesting less rumen proteolysis than lambs fed the other diets. Lamb performance was improved by feeding sulla or lucerne compared to pasture, and the lucerne:sulla mixture resulted in better performance than the average of the 2 species fed alone. 
