Resumo
Young coffee plants were allowed to absorb radiophosphate via leaves during 30, 60, 90 and 120 minutes and via roots during 24 hours. It was verified that leaf absorption was almost twice more intense than root uptake despite the considerable difference in time of contact which would favour the latter. Translocation of leaf applied material was also more marked.
Estudos sôbre a alimentação mineral do cafeeiro: XVIII. nota sôbre a absorção foliar e radicular do fósforo por plantas jovens de Coffea arabica L., var. Mundo Novo* * Desenvolvido com auxílio do IBC, CNPq e Fundação Rockefeller.
J. R. SarrugeI; H. V. de AmorimII; E. MalavoltaI
ICadeira de Química Biológica da ESALQ e Centro de Energia Nuclear na Agricultura
IIbolsista do CNPq
SUMMARY
Young coffee plants were allowed to absorb radiophosphate via leaves during 30, 60, 90 and 120 minutes and via roots during 24 hours.
It was verified that leaf absorption was almost twice more intense than root uptake despite the considerable difference in time of contact which would favour the latter. Translocation of leaf applied material was also more marked.
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LITERATURA CITADA
Entregue para publicação a 22-10-66.
- MALAVOLTA, E., L. N. MENARD, J. D. P. ARZOLLA, O. J. CROCOMO, H. P. HAAG & W. L. LOTT, 1959 - Tracer studies in coffee plant (Coffea arabica L.). An. ESALQ 16:65-78.
- MENARD, L. N. & E. MALAVOLTA, 1957 - Absorção e distribuição de fósforo radioativo no cafeeiro. Bol. Super. Serv. Café Ano 32(366):7-14.
Datas de Publicação
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Publicação nesta coleção
19 Jun 2012 -
Data do Fascículo
1966
