Tropical Grasslands (1986) Volume 20, 183192
OBSERVATIONS ON THE DIET SELECTED BY FRIESIAN COWS GRAZING TROPICAL GRASS AND GRASS–LEGUME PASTURES
R.T. COWAN1, T.M. DAVISON1 and R.K. SHEPHARD2
1Queensland Department of Primary industries, Mutdapilly Research Station, M.S. 825, Ipswich, 4305.
The Composition of the diet selected by Friesian cows grazing pure tropical grass pasture containing Panicum maximum cv. Gatton and mixed tropical pasture containing P. maximum cv. Gatton and the legumes Neonotonia wightii cv. Tinaroo and Desmodium intortum cv. Greenleaf was measured during summer and winter on the Atherton Tablelands, north Queensland. The grass pasture was stocked at 2.0 and 3.5 cows ha-1, and received 200 and 400 kg N ha-1 year-1 at each stocking rate. The grass–legume pasture was stocked at 2.0 cows ha-1 and received no nitrogen fertiliser. All pastures were grazed on a rot of one week grazing, three weeks spelling, and samples of the diet determined with oesophageally fistulated heifers.