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Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.33 no.unico Campinas  1974 



Época de colheita do milho, para estudo dos nutrientes nitrogênio, fósforo e potássio, em ensaios em casa de vegetação


Harvesting time and pot size in greenhouse experiments to study nitrogen, phosphorus, and potassium in two varieties of corn



Hermano Gargantini; Edmir Soares*




The effects of harvesting time and pot size in results of greenhouse experiments were investigated to study nitrogen, phosphorus, and potassium fertilization on two varieties of corn: IAC Hmd 6999 and maia-2. The soil used was a Dark Red Latosol collected at the Centro Experimental de Campinas.
The fertilizer treatments were N0P0K0, N0P1K1, N1P0K1, N1P1K0, and N1P1K1. Pots of 6.0 and 10.0 kg capacity were used and harvest were made at 30, 60, 90, 120, 140 and 150 days after germination, according to the variety studied.
With 60 days after germination and for both sizes of pots there was a clear response to nitrogen and phosphorus, indicating that both sizes can be used to study those nutrients in trials with corn. There was no conclusion for potassium fertilizing. A different reaction to nitrogen was observed according to the varietv utilized.



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Recebida para publicação em 17 de maio de 1974.



* Com bolsas de suplementacão do CNPq.

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