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Dry Matter and Nitrogen Accumulation and Partitioning in Field Grown Winged Bean

Published online by Cambridge University Press:  03 October 2008

R. R. Weil  and
G. S. Belmont
R. R. Weil
Affiliation:
Department of Agronomy, University of Maryland, College Park, MD 20742, USA.
G. S. Belmont
Affiliation:
Department of Agronomy, University of Maryland, College Park, MD 20742, USA.
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Summary

Growth and the partitioning of dry matter and nitrogen were studied in winged bean ‘SLS-40’ grown with single stake supports at two sites in Sri Lanka. Plant parts (leaves, petioles, stems, roots, nodules, flowers, green pods, mature seeds, and mature pod-walls) were collected periodically, if present, for up to 32 weeks after emergence. Slow growth up to the seventh week was followed by rapid growth (2.8 g plant−1 day−1) for the next 15–17 weeks. Little leaf senescence was observed and the nitrogen content of the leaf tissue remained close to 45 mg N g−1 throughout growth. The rate of nitrogen accumulation was 2.3–2.7 kg N ha−1 day−1 between weeks 13 and 32. The final accumulation of nitrogen in the above ground material was 280 to 312 kg N ha−1, only 34% of that being in the mature seed. The harvest index for dry matter was 17.5–20% and the dry seed yield almost 2 t ha−1.

Type
Research Article
Information
Experimental Agriculture , Volume 27 , Issue 3 , July 1991 , pp. 323 - 328
Copyright
Copyright © Cambridge University Press 1991

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References

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