Calibration of a Minolta SPAD-502 chlorophyll meter for evaluation of the nitrogen nutrition of maize

Authors

  • Lincoln Zotarelli
  • Eduardo Garcia Cardoso
  • Jorge Luiz Piccinin
  • Segundo Urquiaga
  • Robert Michael Boddey
  • Eleno Torres
  • Bruno José Rodrigues Alves

DOI:

https://doi.org/10.1590/S1678-3921.pab2003.v38.6680

Keywords:

Avena strigosa, Lupinus albus, green manures, nutritional status

Abstract

The subject of this study was the calibration of a Minolta SPAD-502 chlorophyll meter for evaluation of the N nutrition of maize, firstly comparing the chlorophyll readings to the contents obtained from either 80% acetone or N,N-dimethylformamide (DMF) chlorophyll extrators. The chlorophyll of the maize leaves cultivated under zero-tillage after oat and lupin for two consecutive harvests was evaluated in a field experiment. The chlorophyll extraction after 72 hours in DMF solution, was the most suitable for the calibration of the SPAD-502 chlorophyll meter for maize and its use was coherent with the nutritional status of the crop.

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Published

2003-09-01

How to Cite

Zotarelli, L., Cardoso, E. G., Piccinin, J. L., Urquiaga, S., Boddey, R. M., Torres, E., & Alves, B. J. R. (2003). Calibration of a Minolta SPAD-502 chlorophyll meter for evaluation of the nitrogen nutrition of maize. Pesquisa Agropecuaria Brasileira, 38(9), 1117–1122. https://doi.org/10.1590/S1678-3921.pab2003.v38.6680

Issue

v.38, n.9, set. 2003

Section

SCIENTIFIC NOTES