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Shading effects on the yield of an Argentinian wheat cultivar

Published online by Cambridge University Press:  27 March 2009

R. Savin  and
G. A. Slafer
R. Savin
Affiliation:
Cátedra de Cerealicultura, Departamento de Productión Vegetal, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martin 4453, 1417 Buenos Aires, Argentina.
G. A. Slafer
Affiliation:
Cátedra de Cerealicultura, Departamento de Productión Vegetal, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martin 4453, 1417 Buenos Aires, Argentina.
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Summary

Shading treatments of 50% of the incident radiation were applied to the semidwarf wheat cultivar Leones INTA before and after anthesis in two field experiments in Argentina in 1987 and 1988. The treatments reduced biological (above-ground dry matter) yield, grain yield and number of grains/m2. Number of grains/m2 was closely and linearly correlated with ear dry weight at anthesis and with the photothermal quotient, calculated from 20 days before to 10 days after anthesis. Grain yield was sink limited, and the shading treatments reduced sink strength. The contribution of preanthesis assimilates to grain yield was smaller in the shaded crops than in the unshaded controls; in unshaded crops, almost 40% of grain yield was contributed by preanthesis assimilates whilst in preanthesis shaded crops this contribution was negligible. The proportion of preanthesis assimilates contributed to the grain was closely related to the decrease in stem dry weight during grain filling. The effects of shading on main stems and tillers were the same.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 116 , Issue 1 , February 1991 , pp. 1 - 7
Copyright
Copyright © Cambridge University Press 1991

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References

REFERENCES

Austin, R. B., Edrich, J. A., Ford, M. A. & Blackwell, R. D. (1977). The fate of the dry matter, carbohydrates and 14C lost from leaves and stems of wheat during grain filling. Annals of Botany 41, 1309–1321.CrossRefGoogle Scholar
Austin, R. B., Morgan, C. L., Ford, M. A. & Blackwell, R. D. (1980). Contributions to grain yield from preanthesis assimilation in tall and dwarf barley phenotypes in two contrasting seasons. Annals of Botany 45, 309–319.CrossRefGoogle Scholar
Bidinger, F., Musgrave, R. B. & Fischer, R. A. (1977). Contribution of stored preanthesis assimilate to grain yield in wheat and barley. Nature 270, 431–433.CrossRefGoogle Scholar
Casal, J. J. (1988). Light quality effects on the appearance of tillers of different order in wheat (Triticum aestivum). Annals of Applied Biology 112, 167–173.CrossRefGoogle Scholar
Coaldrake, P. D. & Pearson, C. J. (1985). Development and dry weight accumulation in pearl millet as affected by nitrogen supply. Field Crops Research 11, 171–184.CrossRefGoogle Scholar
Fischer, R. A. (1975). Yield potential in a dwarf spring wheat and the effect of shading. Crop Science 15, 607–613.CrossRefGoogle Scholar
Fischer, R. A. (1985). Number of kernels in wheat crops and the influence of solar radiation and temperature. Journal of Agricultural Science, Cambridge 105, 447–461.CrossRefGoogle Scholar
Fischer, R. A. & Aguilar, M. (1976). Yield potential in a dwarf spring wheat and the effect of carbon dioxide fertilization. Agronomy Journal 68, 749–755.CrossRefGoogle Scholar
Fischer, R. A. & Stockman, Y. M. (1980). Kernel number per spike in wheat: responses to preanthesis shading. Australian Journal of Plant Physiology 7, 169–180.Google Scholar
Gallagher, J. N., Biscoe, P. V. & Scott, R. K. (1975). Barley and its environment v. stability of grain weight. Journal of Applied Ecology 12, 319–336.CrossRefGoogle Scholar
Gallagher, J. N., Biscoe, P. V. & Humber, B. (1976). Effects of drought on grain growth. Nature 264, 541–542.CrossRefGoogle Scholar
Gallagher, J. N. & Biscoe, P. V. (1978). Radiation absorption, growth and yield of cereals. Journal of Agricultural Science, Cambridge 91, 47–68.CrossRefGoogle Scholar
Hall, A. J., Connor, D. J. & Whitfield, D. M. (1989). Contribution of preanthesis assimilates to grain filling in irrigated and water stressed sunflower crops. I. Estimates using labelled carbon. Field Crops Research 20, 95–112.CrossRefGoogle Scholar
Howell, T. A., Meek, D. W. & Hatfield, J. L. (1983). Relationship of photosynthetically active radiation to short wave radiation in the San Joaquin Valley. Agricultural Meteorology 28, 157–175.CrossRefGoogle Scholar
Jenner, C. F. (1979). Grain filling in wheat plants shaded for brief periods after anthesis. Australian Journal of Plant Physiology 6, 629–641.Google Scholar
Kirby, E. J. M. (1988). Analysis of leaf, stem and ear growth in wheat from terminal spikelet stage to anthesis. Field Crops Research 18, 127–140.CrossRefGoogle Scholar
Siddique, K. H. M., Belford, R. K., Perry, M. W. & Tennant, D. (1989). Growth, development and light interception of old and modern wheat cultivars in a Mediterranean-type environment. Australian Journal of Agricultural Research 40, 473–487.Google Scholar
Slafer, G. A. & Andrade, F. H. (1989). Genetic improvement in bread wheat (Triticum aestivum L.) yield in Argentina. Field Crops Research 21, 289–296.CrossRefGoogle Scholar
Slafer, G. A., Andrade, F. H. & Satorre, E. H. (1990). Genetic-improvement effects on preanthesis physiological attributes related to wheat grain-yield. Field Crops Research, 23, 255–263.CrossRefGoogle Scholar
Stockman, Y. M., Fischer, R. A. & Brittain, E. G. (1983). Assimilate supply and floret development within the spike of wheat. Australian Journal of Plant Physiology 10, 585–594.Google Scholar
Thorne, G. N. & Wood, D. W. (1987). Effects of radiation and temperature on tiller survival, grain number and grain yield in winter wheat. Annals of Botany 59, 413–426.CrossRefGoogle Scholar
Thorne, G. N. & Wood, D. W. (1988). Contributions of shoot categories to growth and yield of winter wheat. Journal of Agricultural Science, Cambridge 111, 285–294.CrossRefGoogle Scholar
Tottman, D. R. (1987). The decimal code for the growth stages of cereals, with illustrations. Annals of Applied Biology 110, 441–454.CrossRefGoogle Scholar
Wardlaw, I. F. (1970). The early stages of grain development in wheat: response to light and temperature in a single variety. Australian Journal of Biological Science 23, 765–774.CrossRefGoogle Scholar
Wall, P. C. (1979). An analysis of factors limiting grain numbers and yield of spring wheat in a low-latitude environment. PhD thesis, University of Reading.Google Scholar