Oil palm fertilization in Brazilian Central Amazonia.
The effect of N, P, K and Mg fertilizers on oil palm growth and yields was studied from 1984 to 1990 on a latosol in the Manaus region, Brazil. Three fertilizer regimes were compared in the case of P, K and Mg but only 2 in the case of N. The fertilizers were applied at rates which increased in steps as plants aged. Increasing P rates significantly improved NP nutrition, oil palm development (up to 6 years) and yields (from 4 to 7 years). A modest P rate (50 kg/ha annually) rapidly corrected P deficiency without inducing a marked K deficiency. In the absence of K fertilizer application, K contents gradually fell to very low levels, from the age of 6 years (1989), though without any effect on palm yields in 1990.
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| Main Authors: | , , |
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| Format: | Texto biblioteca |
| Language: | ng |
| Published: |
©199
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| Subjects: | Amazonas, Brazil, deficiency, magnesium, nitrogen, NPK fertilizers, oil palms, oilseed plants, phosphorus, plant nutrition, potassium, tropical crops, Scarcity, Magnesium, Nitrogen, Oilseed plants, Phosphorus, Plants, Potassium, Tropical crops, Food., |
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| Summary: | The effect of N, P, K and Mg fertilizers on oil palm growth and yields was studied from 1984 to 1990 on a latosol in the Manaus region, Brazil. Three fertilizer regimes were compared in the case of P, K and Mg but only 2 in the case of N. The fertilizers were applied at rates which increased in steps as plants aged. Increasing P rates significantly improved NP nutrition, oil palm development (up to 6 years) and yields (from 4 to 7 years). A modest P rate (50 kg/ha annually) rapidly corrected P deficiency without inducing a marked K deficiency. In the absence of K fertilizer application, K contents gradually fell to very low levels, from the age of 6 years (1989), though without any effect on palm yields in 1990. |
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