Nitrogenio na adubacao química do cafeeiro: doses e parcelamentos do nitrocálcio
Three experiments were carried out beginning in 1973/74 in a Red Latosol transition to Clay Red Yellow Latosol at the Centro Experimental of Campinas, in a Red-Yellow Podzolic Soil at Estacao Experimental of Mococa, and on a Ortho Red Latosol at Estacao Experimental of Ribeirao Preto, State of Sao Paulo, Brazil, in order to study nitrogen application on the coffee tree. Lime ammonium nitrate was applied at rates of 60, 120, 180 and 240 g of N per plant in splitted applications as follows: in just one time by October and by December; in two times, by January and February; and in four times by October, December, January and February. High yield increases were obtained with N applications rates up to 120 gr of N per plant. With higher rates further yield increments were about 5 or 10 per cent. The residual effects of ammoniun nitrate, Chilean nitrate and urea were still present ten years after the last application. The data on coffee yield obtained with splitted applications of N were not consistent
| Main Authors: | , , , |
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| Format: | biblioteca |
| Published: |
1986
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| Subjects: | COFFEA ARABICA, FERTILIZANTES NITROGENADOS, DOSIS DE APLICACION, PARCELAS, NITRATO DE CALCIO, UREA, SALITRE DE CHILE, PULVERIZACION, EFECTOS RESIDUALES, RENDIMIENTO, BRASIL, |
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