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The effects of phosphate and soil moisture on the nodulation and growth of Phaseolus vulgaris

Published online by Cambridge University Press:  27 March 2009

R. Bonetti
Affiliation:
Cenlro de Energia Nuclear na Agricultura, 13400 - Piracicaba, SP., Brazil
Maria Nazareth S. Montanheiro
Affiliation:
Universidade Metodista de Piracicaba, 13400 - Piracicaba, SP., Brazil
Siu M. T. Saito
Affiliation:
Cenlro de Energia Nuclear na Agricultura, 13400 - Piracicaba, SP., Brazil

Summary

An examination of the effects of adding phosphorus to the soil on nodulation and P utilization in Phaseolus vulgaris L. showed a positive response in plant weight to increasing rates of phosphorus (32P) when water tension was low in the pots.

The efficiency of the utilization of fertilizer-P was directly influenced by the water content of the soil, showing increasing P accumulation after flowering.

A highly positive interaction between P addition, water content and nodulation was observed. Nodules were shown to have a high P requirement, with phosphorus (32P) contributing to an increase in the number and size of nodules.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1984

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