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Performance of grasslands Hamua x Moroccan red clover crosses in a marginal environment

S.C. Clark and K.F.M. Reed

Pastoral Research Institute, DARA, Hamilton, Vic. 3300

Red and white clovers have been the most productive perennial clovers at Hamilton (700 mm average rainfall p.a.) (1). As this is a marginal environment for these species, interest has focused on Mediterranean genotypes.


On 22 May 1981, a small plot experiment (no. 1) was established at Hamilton to compare the DSIR Grasslands (G) Hamua x Moroccan crosses (G.21 and G.22) with Australasian cultivars. Three replicates were used and viable seed was drilled at 9 kg/ha. Yields were low due probably to unusually dry springs in 1981 and 1982. Subsequently, experiment 2 was established on 13 October 1983 with five seed mixtures drill sown with and without Italian Ryegrass in a split-plot design with three replicates. The seeding rates were 270 germinable clover seeds/m and 7 kg/ha of ryegrass. The fertilizer at sowing was 200 kg/ha super-lime + Mo (0.015%).

Results and Discussion

The tetraploid G. 22 was the most persistent line in Experiment 1 and the Moroccan lines were the most persistent in Experiment 2 (Table 1).

Table 1 Main effect of cultivar on the density of clover plots (no./m2)

Table 2 Dry matter yield (t/ha)

As observed in experiment 1, G. 22 was the most productive line in autumn/ winter although total yields were not different (P>0.05). As with the other Grasslands material, G. 22 is oestrogenic.

1. Flinn, P.C., Reed, K.F.M., Saul, G.R., Ward, G.N. and Graham, J.G. 1985. Proc. XV Int. Grassld. Congr., Kyoto, Japan. pp 961-2.

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