Sward tests of some Stylosanthes guyanensis accessions in tropical and subtropical environments

Abstract

An experiment is described in which 48 S. guyanensis accessions, comprising 11 morphological-agronomic (M–A) subgroups, were grown with an associated grass (Urochloa mosarnbicensis or Setaria anceps cv. Narok) for 3 years in small mown swards at up to nine different tropical and subtropical environments in northern Australia. The experiment was non-orthogonal, but could be analysed as three substantially orthogonal subsets; simple ranking techniques were used to explore the complete data set.Significant differences were shown to exist between the M–A groups, but these were less clear-cut than in other Stylosanthes species; the S. guyanensis groups are agronomically more variable. Nevertheless, the results have indicated the existence of five accessions which appear able to outyield any existing cultivar in the appropriate environments. These arc CPI 34911 (M–A group 8A) over a wide range of tropical sites; 40255 (10B) and Q8231 (8A), less wide-ranging than 34911 but outyielding it at a site with a long growing season; and 46590 and 46589C (both 8B), In the high-rainfall subtropics. All would merit more extended trials.

Effect of weed management practices on productivity, economics, quality and soil fertility of Guinea grass (Panicum maximum)-based pasture intercropped with legumes

“…This was due to better survival and growth of Stylosanthes seabrana over the years as compared to other legumes. Edye et al (1998) reported that Stylosanthes seabrana was consistently superior to other Stylosanthes species in seedling, perennial plant density and yield particularly in the third year of the experiment. Basak et al (2003) also reported that Stylosanthes seabrana had the best overall yield performance out of twenty cultivars of Stylosanthes species evaluated for their growth and yield performance.…”

Effect of Weed Control on Performance of Guinea Grass-Legumes Intercropping System under Rainfed Conditions

“…This was due to better survival and growth of S. seabrana over the years as compared to S. hamata, Macroptillium atropurpureum and C. ternatea. Edye et al (1998) reported that Stylosanthes seabrana were consistently superior to other Stylosanthes species in seedling and perennial plant density and yield particularly in the third year of the experiment and Basak et al (2003) also reported that Stylosanthes seabrana had the best overall yield performance out of twenty cultivars of Stylosanthes were evaluated for their growth and yield performance. In total dry forage yields, per cent contribution of S. seabrana were maximum (34.90, 31.17, 41.62 and 40.73) during 1st, 2 nd , 3 rd and 4 th years respectively.…”