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The growth of maize. II. Dry-matter partition in three maize hybrids

Published online by Cambridge University Press:  27 March 2009

B. O. Adelana  and
G. M. Milbourn
B. O. Adelana
Affiliation:
Wye College (University of London), Ashford, Kent
G. M. Milbourn
Affiliation:
Wye College (University of London), Ashford, Kent
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Summary

Work that has been reported from some African countries indicates a dependence of grain yield in maize on the duration of leaf area after flowering. This paper studies maize yield in south-east England and confirms work at a similar northern latitude in Canada which has shown that considerable remobilization of photosynthate from the stem to the ear takes place during the main ear fill period.

A similar grain yield was obtained from two contrasting hybrids. In a short early hybrid, Kelvedon 75A, there was a low peak leaf area index (5·3) but the net assimilation rate was high due possibly to efficient light interception by leaves that maintained an erect posture. Stem dry matter was also low and hence in this hybrid the high reproductive/vegetative ratio shows that there has been economy in the production of leaves and stem, especially as a 48% stem loss occurred during the period of ear fill.

In contrast, in a later hybrid, Anjou 210, the final shoot dry matter was 20% higher as the peak leaf-area index of 7·7 gave slightly higher crop growth rates than K 75A. Although the remobilization of stem dry matter was similar in both hybrids it was notable that a different partition of dry matter in the ears of Anjou 210 gave a higher grain/rachis ratio.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 1 , February 1972 , pp. 73 - 78
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Adelana, B. O. & Milbourn, G. M. (1972). The growth of maize. I. The effect of plant density on yield of digestible dry matter and grain. J. agric. Sci., Camb. 78, 65–71.Google Scholar
Allison, J. C. S. (1969). Effect of plant population on the production and distribution of dry matter in maize. Ann. appl. Biol. 63, 135–44.CrossRefGoogle Scholar
Allison, J. C. S. & Watson, D. J. (1966). The production and distribution of dry matter in maize after flowering. Ann. Bot. N.S. 30, 365–83.CrossRefGoogle Scholar
Bingham, J. (1969). The physiological determinants of grain yield in cereals. Agric. Prog. 44, 30–42.Google Scholar
Daynard, T. B., Tanner, J. W. & Hume, D. J. (1969). Contribution of stalk soluble carbohydrates to grain yield in corn (Zea mays L.). Crop Sci. 9, 831–4.CrossRefGoogle Scholar
Lupton, E. G. H. (1968). T he analysis of grain yield of wheat in terms of photosynthetie ability and efficiency of translocation. Ann. appl. Biol. 61, 109–19.CrossRefGoogle Scholar
Mueller, P. W. (1964). A study of the growth and yield of early and late maturing maize hybrids in Rhodesia. Ph.D. thesis, University of London.Google 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., Welbank, P. J. & Blackwood, G. C. (1969). Growth and yield of six short varieties of spring wheat derived from Novin 10 and of two European varieties. Ann. appl. Biol. 63, 241–51.CrossRefGoogle Scholar
Van Eijnatten, C. L. M. (1963). A study of the development of two varieties of maize at Ibadan. Niger. J. agric. Sci. 61, 65–72.CrossRefGoogle Scholar