Glasshouse experiments were carried out in the Experimental

Station La Renée located in Habana province in the year

2003. The objective of this study was to evaluate the

effectiveness of phosphorus (P) sources varying in solubility

for common bean (Phaseolus vulgaris L.) nutrition using the

isotopic dilution method, growing under two soils, Acrisol

and Rhodic Ferralsol. The P sources evaluated in both soils

were phosphate rock (PR) Trinidad de Guedes and PR

partially solubilized at 50% with H2SO4, namely FPA 50,

whereas single super phosphate (SS) and triple super

phosphate (TSP) were used in the Acrisol and Rhodic

Ferralsol soils, respectively. The common bean genotypes

were BAT 477, DOR 364, DOR 390 and Censa, and BAT 58,

BAT 477, DOR 364 and CC-25-9(N) in the Acrisol and

Rhodic Ferralsol soils, respectively. Dry matter production, P

extraction, and the fraction and quantity of P in plants

obtained from different P sources were evaluated, and P use

efficiency of each P fertilizer were calculated. Single and

triple super phosphate and FPA 50 were effective P fertilizers

in both soils whereas RF was not.

Keywords: Phosphorus, common bean, isotope, phosphate rock, genotypes.