Evaluation of phosphatic fertilizers of different solubility for common bean using isotopic methods.
DOI:
https://doi.org/10.15517/am.v16i2.11869Keywords:
Phosphorus, common bean, isotope, phosphate rock, genotypes.Abstract
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.
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