Tropical Grasslands (1982) Volume 16, 170180
PRODUCTIVITY OF FIVE SUBTROPICAL GRASSES ON A BLACK EARTH OF THE EASTERN DARLING DOWNS OF QUEENSLAND
J. MACKENZIE1, R. MAYER2 and W.J. BISSET3
1Queensland Wheat Research Institute, P.O. Box 5282, Toowoomba, Qld 4350.
Four subtropical perennial grass species and a perennial forage sorghum were compared for dry matter production and herbage nitrogen concentration at three levels of nitrogen fertiliser in a cutting trial on a cracking clay soil of the eastern Darling Downs. At 3 months after sowing, Sorghum spp. hybrid cv. Silk had considerably outstripped the perennial grasses in dry matter yield while Chloris gayana cv. Pioneer outyielded Panicum coloratum var. makarikariense cv. Pollock, Bothriochloa insculpta cv. Hatch and Dichanthium aristatum. Over the next 5 years Silk and B. insculpta were the best dry matter producers at each rate of fertiliser; D. aristatum was the lowest producer and had the shortest growing season.