@conference {69021,
	title = {Effects of high potassium on in vitro fermentation pattern and C18 fatty acid metabolism of pasture grass},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {69},
	year = {2009},
	month = {Jun},
	pages = {238-241},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Christchurch},
	abstract = {The effect of high potassium concentration on rumen fermentation and fatty acid biohydrogenation (BH) were investigated in a 6 hour in vitroincubation. A pasture grass sample with 26.3 g/kg dry matter (DM) of potassium was used as control. Supplemental levels of 10, 20 and 30 g/kg DM of potassium were added as potassium chloride. Results showed that high potassium concentration had no significant effects (P >0.05) on pH, molar concentrations of total or individual volatile fatty acids (VFA), concentrations of C18:0, C18:1 trans 11, C18:1 cis 9, C18:2n-6, or BH of C18:2n-6after incubation. However, concentration and BH of C18:3 n-3were significantly (P <0.01) affected by potassium supplementation. Both the 20 and 30 g/kg DM supplementation significantly (P <0.05 and P <0.01, respectively) decreased the concentration but increased BH of C18:3n-3. This preliminary study indicates that high concentrations ofpotassium alter rumen fatty acid metabolism. Further studies are needed to confirm this and investigate the possible causal mechanisms.},
	issn = {1176-5283},
	author = {Sun XQ and Dewhurst RJ.Gibbs SJ}
}
