Oil palm fertilization in Brazilian Central Amazonia.
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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.
Incluye 9 referencias bibliográficas.
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.
Incluye 9 referencias bibliográficas.
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.
Palabras clave
Amazonas, Brazil, deficiency, magnesium, nitrogen, NPK fertilizers, oil palms, oilseed plants, phosphorus, plant nutrition, potassium, tropical crops, Scarcity, Magnesium, Nitrogen, Nitrogen, Oilseed plants, Phosphorus, Plants, Plants, Potassium, Tropical crops, Food.