Tropical Grasslands (2001) Volume 35, 3442
Competition in pots between two tropical legumes (Stylosanthes hamata and S. scabra) and two tropical grasses (Urochloa mosambicensis and Bothriochloa pertusa) at two phosphorus fertiliser levels
F.D. HU and R.J. JONES
CSIRO Tropical Agriculture, Davies Laboratory, Townsville, Queensland, Australia
In a replacement series pot experiment on a yellow podzolic/yellow earth intergrade soil, 4 legume-grass mixtures were grown at 5 legume:grass proportions, and 2 soil fertiliser levels, 0 or 10 kg/ha P. Grasses were Urochloa mosambicensis cv. Nixon and Bothriochloa pertusa cv. Bowen grown in factorial combination with Stylosanthes scabra cv. Seca and S. hamata cv. Verano. Plants were harvested after 10 weeks of growth.
From the measures of competition calculated (relative crowding coefficient and relative replacement rate), there was no suggestion that Bowen was more competitive toward legumes than was Nixon at either P treatment. Verano was, however, far more competitive than Seca with both grasses, and equally as competitive as the grasses on this soil.