Summary
The response to phosphate fertilizer by modern wheat genotypes was examined in the field under natural rainfall in three seasons. Models were developed which show that grain yield was positively correlated with biological yield and harvest index. In one of the seasons, which was relatively dry, shorter statured wheats gave higher yields at each level of applied phosphate. Higher levels of phosphate tended to offset the reduction in yield associated with late heading and the importance of biological yield on grain yield. The genotypes which produced the largest number of grains m-2 produced the highest yields.
Implications for plant breeding programs are discussed.
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References
Fisher, R. A. & R.Maurer, 1978. Drought resistance in spring wheat cultivars. I. Grain yield responses. Aust. J. Agric. Res. 29: 897–912.
Green, D. G., M. E.Dodds & F. G.Warder, 1975. Relationship between kernel moisture and translocation of phosphorus into kernels of windrowed wheat. Can. J. Plant Sci. 55: 319–320.
Jessop, R. S., 1974. Dependence on cultivar of wheat yield response to superphosphate. Aust. J. Exp. Agric. Anim. Husb. 14: 387–397.
Jessop, R. S. & B.Palmer, 1976. Seasonal dependence of wheat variety response to superphosphate. J. Agric. Sci., Camb. 87: 307–314.
Laing, D. R. & R. A.Fisher, 1977. Adaptation of semidwarf wheat cultivars to rainfed conditions. Euphytica 26: 129–139.
Martin, R. H., 1981. In Farrer's footsteps: Farrer Memorial Oration 1980. J. Aust. Inst. Agric. Sci. 47: 123–131.
Smith, A. N. & G. D. Batten, 1976. The efficiency, accuracy and reliability of soil testing for phosphorus in wheat belt soils: a study in the south west wheat belt. Tech. Bull. 11. Dept. Agric. N.S.W.
Smith, A. N. & T. B.Spence, 1974. Response of wheat to applied superphosphate; the relationship between yield increase and ‘available’ phosphate in the soil. Aust. J. Exp. Agric. Anim. Husb. 14: 249–255.
Stace, H. C. T., G. D.Hubble, R.Brewer, K. H.Northcote, J. R.Sleeman, M. J.Malcahy & E. G.Hallsworth, 1968. ‘A Handbook of Australian soils’. Rellim Technical Publications: Glenside, S.A.
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Batten, G.D., Khan, M.A. & Cullis, B.R. Yield responses by modern wheat genotypes to phosphate fertilizer and their implications for breeding. Euphytica 33, 81–89 (1984). https://doi.org/10.1007/BF00022753
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DOI: https://doi.org/10.1007/BF00022753