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Phosphorus Utilization Efficiency as Affected by Component Population, Rhizobial Inoculation and Applied Nitrogen in Maize/Mungbean Intercropping

Published online by Cambridge University Press:  03 October 2008

Mrinal K. Chowdhury  and
Elpidio L. Rosario
Mrinal K. Chowdhury
Affiliation:
Department of Agronomy, University of the Philippines at Los Baños, 4031 College, Laguna, Philippines
Elpidio L. Rosario
Affiliation:
Department of Agronomy, University of the Philippines at Los Baños, 4031 College, Laguna, Philippines
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Summary

The effects of component population, rhizobial inoculation and applied nitrogen on the efficiency of phosphorus utilization in maize/mungbean intercropping were examined in two experiments. The efficiency of phosphorus absorption decreased by between 5 and 43% in maize and by between 31 and 58% in mungbean as a result of intercropping. The overall efficiency of phosphorus absorption in intercropping decreased with increasing nitrogen level but a parallel increase in overall conversion efficiency maintained a constant and large land equivalent ratio (LER) up to the highest level of nitrogen. The increase in LER over unity, however, was due primarily to the greater total absorption of phosphorus by maize and mungbean together in intercropping compared with that when they were grown in pure stands.

Type
Research Article
Information
Experimental Agriculture , Volume 28 , Issue 3 , July 1992 , pp. 255 - 263
Copyright
Copyright © Cambridge University Press 1992

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