Bioevaluation of the nutritional status of rice (Oriza sativa L. cv. IAC-165) and bean (Phaseolus vulgaris L. cv. carioca) plants using 15N and 32P

Authors

  • A.M. Calvache Universidad Central del Ecuador
  • A.C.C. Bernardi USP; ESALQ; Departamento de Química
  • F.C. Oliveira USP; ESALQ; Departamento de Química
  • E. Prada Neto USP; ESALQ; Departamento de Ciência do Solo
  • J.A.A. Silva USP; ESALQ; Departamento de Ciência do Solo
  • E. Malavolta USP; Centro de Energia Nuclear na Agricultura

DOI:

https://doi.org/10.1590/S0103-90161994000300002

Keywords:

nutricional status, bioevaluation, rice, bean, 15N, 32P

Abstract

Rice and bean plants were grown in nutrient solution in the presence of three levels of N, P and K. The method of the bioevaluation of the nutricional status, in which excised roots are allowed to take up tagged elements, in this case 15N and 32P, was compared with foliar analysis. Two main conclusions were drawn: 1) the bioevaluation proved to be an useful and rapid procedure for the diagnosis of the nutricional status of both species, since there was a significant negative correlation between absorption of N and P and dry matter yield; 2) the uptake of the tagged ions with either element by the roots of plants grown under deficient levels of N and P in the nutrient solution was inversely proportional to the leaf concentration of both nutrients.

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Published

1994-12-01

Issue

Vol. 51 No. 3 (1994)

Section

Nuclear Energy in Agriculture

License

All content of the journal, except where identified, is licensed under a Creative Common attribution-type BY-NC.

How to Cite

Bioevaluation of the nutritional status of rice (Oriza sativa L. cv. IAC-165) and bean (Phaseolus vulgaris L. cv. carioca) plants using 15N and 32P . (1994). Scientia Agricola, 51(3), 393-398. https://doi.org/10.1590/S0103-90161994000300002