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The growth and yield of tall and short sorghums in Nigeria

Published online by Cambridge University Press:  27 March 2009

P. R. Goldsworthy
P. R. Goldsworthy
Affiliation:
Institute for Agricultural Research, Ahmadu Bello University, Samaru, Zaria
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Summary

A Nigerian, long-season, sorghum produced 15 tons of dry matter/acre in about 155 days, but the grain yield was small (2000 lb/acre or 2242 kg/ha) because only part of the dry matter formed after heading went into the grain. In contrast, an American, short-season hybrid which formed only from one-half to one-third as much dry weight as Farafara, gave over 4000 lb of grain/acre (4484 kg/ha) in 100 days. A Nigerian sorghum of intermediate height and a long-season hybrid, produced by crosses between Nigerian varieties and an American, short-season sorghum, gave larger yields than the tall variety because they formed more heads/unit area and more grains/head.

Crop growth rates of the three long-season sorghums sown in June increased to a peak in July, but declined sharply to very small values in September, and then increased again very rapidly at the end of September as heads emerged. The most important factors causing the decline were a decrease in radiation and a loss in dry weight from decay and detachment of dead leaves. An increase in radiation at the end of September and developmental changes associated with head emergence contributed to the increase in growth rates just before heading.

A large proportion of the dry weight formed after heading in Farafara accumulated in the stem but a smaller proportion in the other long-season variety and the longseason hybrid. There was an inverse relationship between the increase in stem weight and the yield of grain. For large grain yields, sorghums are needed that will produce heads with sufficient grains to accommodate all the assimilate that the leaves produce at the end of the rains when crop growth rates are increasing.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 1 , August 1970 , pp. 109 - 122
Copyright
Copyright © Cambridge University Press 1970

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References

REFERENCES

Allison, J. C. S. & Watson, D. J. (1966). The production and distribution of dry matter in maize after flowering. Ann. Bot., N.S. 30, 356–81.CrossRefGoogle Scholar
Archbold, H. K. (1945). Some factors concerned in the process of starch storage in the barley grain. Nature, Lond. 156, 70–3.CrossRefGoogle Scholar
Curtis, D. L. (1966). Sorghum in Northern Nigeria. Ph.D. Thesis, University of Reading.Google Scholar
Enyi, B. A. C. (1962). Comparative growth rates of upland and swamp rice varieties. Ann. Bot., N.S. 26, 467–87.CrossRefGoogle Scholar
Goldsworthy, P. R. (1970). The sources of assimilate for grain development in tall and short sorghum. J. agric. Sci., Camb. 74, 523–31.CrossRefGoogle Scholar
Goldsworthy, P. R. & Tayler, R. S. (1970). The effect of plant spacing on grain yield of tall and short sorghum in Nigeria. J. agric. Sci., Camb. 74, 1–10.CrossRefGoogle Scholar
Hughes, A. P. & Freeman, P. R. (1967). Growth analysis using frequent small harvests. J. appl. Ecol. 4 (2), 553–60.CrossRefGoogle Scholar
Radford, P. J. (1967). Growth analysis formulae—their use and abuse. Crop Sci. 7 (3), 171–5.CrossRefGoogle Scholar
Steele, W. M. (1964). Physiological studies on sorghum. Unpublished report. Inst. agric. Res., Samaru, Zaria, Nigeria.Google Scholar
Stickler, F. C. & Pauli, A. W. (1961). Leaf removal in grain sorghum. I. Effect of defoliation treatments on yield and components of yield. Agron. J. 53 (2), 99–102.CrossRefGoogle Scholar
Thorne, G. N. (1965). Photosynthesis of ears and flag leaves of wheat and barley. Ann. Bot., N.S. 29, 317–29.CrossRefGoogle Scholar
Thorne, G. N. (1966). Physiological aspects of grain yield in cereals. In The Growth of Cereals and Grasses (Ed. Milthorpe, F. L. and Ivins, J. D..) London: Butterworths.Google Scholar
Watson, D. J. (1958). The dependence of net assimilation rate on leaf area index. Ann. Bot., N.S. 22, 37–54.CrossRefGoogle Scholar
Watson, D. J., Thorne, G. N. & French, S. A. W. (1963). Analysis of growth and yield of winter and spring wheats. Ann. Bot., N.S. 27, 1–22.CrossRefGoogle Scholar