 | Abstract 260Cobalt concentrations in pasture species grown in several cattle grazing areas of Queensland.Barry,GA Dep. Primary Industries, Indooroopilly, Qld. 4068, Australia. Queensland-Journal-of-Agricultural-and-Animal-Sciences. 1984, 41: 2, 73-81; 24 ref. Co concn were determined in Panicum maximum var. trichoglume cv. Petrie, P. maximum cv. Hamil, P. maximum (common Guinea grass), Macroptilium atropurpureum cv. Siratro, Centrosema pubescens, Dichanthium sericeum, Cenchrus ciliaris, Chloris gayana, Aristida spp. and Eragrostis spp., grown in 5 cattle grazing areas of Queensland. Co concn ranged from 0.008 to 0.363 æg/g DM and were higher in legumes than in grasses grown at the same location. Seasonal changes in plant Co content were variable and in some cases tended to coincide with changes in physiological maturity of the plant. Distribution of Co within some grass species and variability due to soil type differences within a grazing paddock were shown to be factors to consider when assessing the overall Co status of a pasture. Pasture analyses indicated that beef cattle, which had recorded live weight gains following Co supplementation, had grazed pasture herbage containing 0.01-0.05 æ Co/g DM. This abstract relates to the following species:
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