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Yield Gain and Risk Minimization in Maize (Zea Mays) through Cultivar Mixtures in Semi-arid Zones of the Rift Valley in Ethiopia

Published online by Cambridge University Press:  03 October 2008

Amede Tilahun
Amede Tilahun
Affiliation:
Department of Plant Production and Dryland Farming, Awassa College of Agriculture, Addis Ababa University, PO Box 5, Ethiopia
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Summary

The effect of mixtures of cultivars on yield and risk distribution in four maize cultivars grown at four different population levels was studied in semi-arid environments in Ethiopia. Mixtures yielded between 2 and 29% more than the pure stands, but late maturing pure stands produced more biomass than mixtures. Mixtures of cultivars with similar flowering periods yielded 60% more than the pure stands in dry growing seasons, but only 30% more when there was more rain. Yield gain was associated mainly with varietal synchrony of anthesis and silking. Mixtures composed of cultivars with different flowering times were less at risk from yield loss in the case of end-of-season drought and yielded 100% more than their late flowering component in pure stand. But in long growing seasons, with an early dry spell, pure stands of the late cultivar outyielded the mixtures whereas pure stands of the early flowering cultivars yielded less than the mixtures, except in years with a serious end-of-season drought. The results indicate that it would be profitable to grow mixtures in semi-arid regions if cultivars with similar height and synchronized flowering time were grown at populations of between 65 000 and 90 000 plants ha−1.

Type
Research Article
Information
Experimental Agriculture , Volume 31 , Issue 2 , April 1995 , pp. 161 - 168
Copyright
Copyright © Cambridge University Press 1995

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References

REFERENCES

Backer, R. J. & Rossnagel, B. J. (1988). Inter plot competition between wheat and barley cultivars of differing heights. Canadian journal of Plant Sciences 68:1129–1132.CrossRefGoogle Scholar
Burton, J. W., Fountain, M. O., Meng, X. & Carter, T. E. (1992). Interplanting early and late maturing soybean cultivars in alternating strips. Journal of Production Agriculture 5:100–103.CrossRefGoogle Scholar
Fisher, K. S., Johnson, E. C. & Edmeades, G. O. (1983). Breeding and selection for drought resistance in tropical maize. El Batan, Mexico: CIMMYT.Google Scholar
Panse, A., Davĩs, H. C. & Fischbeck, G. (1989). Compensation induced yield gains in mixtures of common beans. Journal of Agronomy and Crop Science 162:346–353.CrossRefGoogle Scholar
Rao, R. C. N., Nadia, K. D. R. & Williams, J. H. (1990). Intercropping short and long duration groundnut genotypes to increase productivity in environments prone to end-of-season drought. Experimental Agriculture 27:79–85.Google Scholar
Reddy, M. D., Sharma, A. R. & Panda, M. M. (1991). Effect of mixed row cropping of early and late maturing rice varieties on crop productivity under intermediate deep water conditions. Experimental Agriculture 27:79–85.CrossRefGoogle Scholar
Trenbath, B. R. (1976). Plant interactions in mixed crop communities. Multiple Cropping. American Society of Agronomy Publication 27, 129–169 (Ed. Stelly, M.).Google Scholar
Willey, R. W. (1979). Intercropping-its importance and research needs. Part I. Competition and yield advantages. Field Crops Abstracts 32:1–10.Google Scholar