Efeito da aplicacao de calcário e fósforo no crescimento de plántulas de cacau em casa de vegetacao
Cacao seedlings grown under greenhouse conditions on an acid soil (Vargito - Typic Tropudult) were submitted to five levels of lime (0, 15, 25, 80 and 100 per cent of the amount required to reach pH 6.4) and three levels of phosphorus (0, 20 and 100 ppm). All the plants received an uniform dosage of nitrogen, potassium, magnesium, sulfur and micronutrients (Fe, Cu, Mn, Zn and Bo). Liming increased yield of cacao when the Al saturation was greater than 50 per cent, this effect being enhanced by P fertilization. On soil samples with Al less than 50 per cent, P application was more effective than lime in increasing growth of cacao seedlings. Growth response to liming took place up to the point of elimination of exchangeable Al (25 per cent of the amount of lime required to reach pH 6.4) after which a significant reduction occurred due to micronutrient deficiencies, especially zinc
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1978
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| Subjects: | THEOBROMA CACAO, PLANTULAS, FERTILIZANTES CALCICOS, ENCALADO, FERTILIZANTES FOSFATADOS, ETAPAS DE DESARROLLO DE LA PLANTA, RENDIMIENTO, |
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