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Anais da Escola Superior de Agricultura Luiz de Queiroz

Print version ISSN 0071-1276

An. Esc. Super. Agric. Luiz de Queiroz vol.37 no.1 Piracicaba  1980

http://dx.doi.org/10.1590/S0071-12761980000100023 

Nota sobre o cultivo do arroz (Oryza sativa L.), cv. IAC 47 e IAC 435 em solução nutritiva*

 

Note on the growth of rice plants, cultivars IAC 47 and IAC 435, in nutrient solution

 

 

A.A. MedeirosI; E. MalavoltaII

IEMBRAPA
IIDepartamento de Química, E.S.A. "Luiz de Queiroz", e CENA, USP

 

 


RESUMO

As soluções nutritivas de HOAGLAND & ARNON (1950) nº 2 de KARIM & VLAMIS (1962) foram fornecidas a duas variedades de arroz, uma de sequeiro (IAC 47) e uma de irrigação (IAC 435). A primeira solução, que contém N nítrico e N amoniacal, garantiu maior produção de matéria seca e maior teor de N total nas plantas que foram colhidas no meio do estádio de perfilhamento. A aeração forçada mostrou-se desnecessária para o crescimento.


SUMMARY

In a preliminary trial, a comparison was made of two nutrient solutions, HOAGLAND & ARNON (1950) number 2, and KARIM & VLAMIS (1962), both in the presence and in the absence of forced aeration. Plants grown during 40 days (till the middle of the tillering stage) showed a higher dry matter yield as well as a higher N content when receiving the first solution, which contains both nitrate and ammonium N, when compared with the latter whose nitrogen is only in the NO-3form. Aeration was not necessary for maximum growth in either case.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

LITERATURA CITADA

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Recebido para publicação em 16/10/1980.

 

 

* Parte da Dissertação de Mestrado do 1º autor.