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Effect of variation in density and phosphate supply on seed production of Stylosanthes humilis

Published online by Cambridge University Press:  27 March 2009

H. M. Shelton  and
L. R. Humphreys
H. M. Shelton
Affiliation:
Department of Agriculture, University of Queensland, St Lucia, Q., 4067, Australia
L. R. Humphreys
Affiliation:
Department of Agriculture, University of Queensland, St Lucia, Q., 4067, Australia
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Summary

Stylosanthes humilis was grown at Brisbane at densities of 10, 50, 250, 850 and 3800 plants/m2 in boxes of sand which received basal nutrients, applications of 0, 10 and 50 kg P/ha as calcium dihydrogen phosphate, and frequent irrigation.

Maximum seed yield was 69 g/m2 at a density of 850 plants/m2. Seed yield was linearly related to the logarithm of density up to 250 plants/m2, and was comparatively stable over the upper density range, declining slightly at supra-optimal density. Inflorescence density exerted the primary control over seed yield, but seed set per floret and floret number per inflorescence were also influential.

The application of 50 kg P/ha increased yield of plant tops by 54% and seed yield by 20%.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 76 , Issue 3 , June 1971 , pp. 325 - 328
Copyright
Copyright © Cambridge University Press 1971

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References

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