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Effects of defoliating different zones on the plant in field beans (Vicia faba L.)

Published online by Cambridge University Press:  27 March 2009

J. McEwen
J. McEwen
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire
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Summary

The mean yield of grain of untreated spring field beans was 2750 kg/ha. By the use of differential defoliation, upper and lower limits were set for the photosynthetic contributions of four zones to this yield:

(i) stems and pods 0–300 kg;

(ii) leaves below first flowering node 280–1150 kg;

(iii) leaves on first nine flowering nodes 720–2100 kg;

(iv) leaves above first nine flowering nodes 260–1150 kg.

The evidence suggested that all zones functioned below their full photosynthetic efficiency when other zones were present and that competition between zones for sites to store carbohydrate was a greater limiting factor than mutual shading.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 3 , June 1972 , pp. 487 - 490
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Hodgson, G. L. & Blackman, G. E. (1957). An analysis of the influence of plant density on the growth of Vicia faba. II. The significance of competition for light in relation to plant development at different densities. J. exp. Bot. 8, 23.CrossRefGoogle Scholar
Humphries, E. C. (1967). The dependence of photosynthesis on carbohydrate sinks: Current concepts. Proc. 1st Int. Symp. on Tropical Root Crops (held at the University of West Indies).Google Scholar
Kuznetsov, V. S. & Bebin, S. I. (1965). Agrobiological basis of topping in fodder beans. Ixv. timiryazev. seV-khoz. Akad. 1, 100–9. In Fid Crop Abstr. 18, 4 (1932).Google Scholar
McEwen, J. (1970). Fertilizer nitrogen and growth regulators for field beans (Vicia fabaL.). II. J. agric. Sci., Camb. 74, 67–72.CrossRefGoogle Scholar
Neales, T. F. & Incoll, L. D. (1968). The control of leaf photosynthesis rate by the level of assimilate concentration in the leaf: a review of the hypothesis. Bot. Rev. 34, 2, 107–25.Google 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.), pp. 88–105. London: Butterworths.Google Scholar