NOTA
Efeito residual da adubação mineral e orgânica na composição química do solo e na composição de folhas de cafeeiro cultivado em Mococa1 1 Trabalho apresentado na 28.ª Reunião Anual da SBPC, realizada em Brasília, DF, no período de 7 a 14 de julho de 1976.
Residual effect of mineral fertilization and farm yard manure on the chemical change in composition of leaves and soil analysis of coffee planted at Mococa
Rúter Hiroce2 2 Com bolsa de suplementação do C.N.Pq. ; Ondino C. Bataglia2 2 Com bolsa de suplementação do C.N.Pq. ; Edmir Soares; Ângela Maria C. Furlani2 2 Com bolsa de suplementação do C.N.Pq. ; Ferdinando R. Pupo de Moraes2 2 Com bolsa de suplementação do C.N.Pq.
SUMMARY
A study was made in Ortho-Red Yellow Podzolic soil on the residual effect of two years of fertilization with NPK and farm yard manure. The principal object was to observe the effects on the chemical characteristics of the soil and leaves, using coffee 'Mundo Novo'.
The soil analysis showed that those treatments that received mineral fertilization lowered the pH. It also lowered the calcium and magnesium content of the soil when compared with check or with treatments that received farm yard manure. Leaf analysis demonstrated a marked residual effect of farm yard manure as a source of nitrogen. Mineral fertilization, on the other hand, showed a greater residual effect of potassium.
Due to the soil pH reduction by the application of mineral fertilization, there was an increase of manganese and aluminum content of the leaves. The correlation between soil pH and the above mentioned elements showed: r = 0,92** and r = -0,66**, respectively.
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Recebido para publicação em 19 de agosto de 1976.
Datas de Publicação
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Publicação nesta coleção
20 Fev 2009 -
Data do Fascículo
Jul 1976
