Phosphorus in Oil Palm Cultivated in the Oriental Amazon

Ismael de Jesus Matos Viegas, Magda do Nascimento Farias, Eric Victor de Oliveira Ferreira, Henrique da Silva Barata, Heráclito Eugênio Oliveira da Conceição, Jessivaldo Rodrigues Galvão, Diocléa Almeida Seabra Silva

Abstract


Amazon soils have a low phosphorus (P) availability and few studies have investigated nutrition of palm oil plantations. This study assessed the effects of P nutrition on oil palm organs according to plant age. The experiment was carried out under field conditions, at the enterprise Agropalma S/A, in the municipality of Tailândia, Pará State, Brazil. The experimental design used was completely randomized with four replications and comprised seven treatments: plants age (2, 3, 4, 5, 6, 7, and 8 years of planting). We evaluated P concentration, accumulation, and exportation in plant components (leaflets, petioles, stipe, rachis, palm heart, arrows, male inflorescences, peduncles, spikelets, and fruits). Palm heart (10.9 g kg-1) and male inflorescence (3.8 g kg-1) showed the highest P concentrations in the vegetative and reproductive organs, respectively. On the other hand, the largest P accumulations were observed in the stipe (159 g plant-1) and fruits (59 g plant-1), increasing from the 3rd year of age of the plants. Bunches exported the largest P amounts (81 g plant-1), especially in older plants. The oil palm immobilizes (24 kg ha-1) and recycles (23 kg ha-1) a large amount of P, more than it exports (12 kg ha-1) P.


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DOI: https://doi.org/10.5296/jas.v9i3.18631

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Journal of Agricultural Studies   ISSN 2166-0379

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