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YIELDS AND QUALITY OF PHASEOLUS BEAN CULTIVARS UNDER FARMERS’ CONDITIONS IN EASTERN AND SOUTHERN AFRICA

Published online by Cambridge University Press:  13 December 2013

HENNING HØGH-JENSEN ,
DONWELL KAMALONGO ,
AMOS NGWIRA  and
FIDELIS A. MYAKA
HENNING HØGH-JENSEN*
Affiliation:
Technical University of Denmark, Kgs. Lyngby, Denmark
DONWELL KAMALONGO
Affiliation:
Technical University of Denmark, Kgs. Lyngby, Denmark
AMOS NGWIRA
Affiliation:
Technical University of Denmark, Kgs. Lyngby, Denmark
FIDELIS A. MYAKA
Affiliation:
Technical University of Denmark, Kgs. Lyngby, Denmark
*
†Corresponding author. Email: [email protected]
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Summary

Common bean (Phaseolus vulgaris L.) is a dominant grain legume in eastern and southern Africa, where it constitutes a major source of protein and microminerals in peoples’ diet. The current studies aimed at determining how initially promising genotypes of bean responded in terms of yield and grain element composition under farmers’ cropping conditions. It was found that variations between genotypes in the proportions of elements in the grain dry matter across a wide range of conditions could be linear with an additional 20% iron (Fe) or zinc (Zn) for some genotypes. However, this linearity was only identifiable under relatively favourable conditions. Further, a favourable season could enhance the proportion of Fe in the grains of the same genotypes by up to 20%, whereas Zn did not respond. Fe and Zn correlated only to some degree with P (r2 > 0.35). It is concluded that the supply of elements in the diet may best be secured by selecting for high-yielding cultivars as the amounts of phosphorus (P), Fe and Zn in the grains correlated strongly (r2 > 0.93) to the dry matter grain yield.

Type
Research Article
Information
Experimental Agriculture , Volume 50 , Issue 2 , April 2014 , pp. 178 - 190
Copyright
Copyright © Cambridge University Press 2013 

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References

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