Implementation of agroforestry systems as a sustainable strategy to improve phosphorus availability in oil palm cultivation in the Amazon
DOI:
https://doi.org/10.24220/2675-7885v4e2023a7167Keywords:
Amazonian agriculture, Agroecology, Oil palm diversification, Soil managementAbstract
Phosphorus (P) is the most limiting nutrient for agricultural production in the tropics. In Amazon soil, the low availability of P has been affected family farming production. Agroforestry Systems are used usually as a sustainable and low-cost alternative for the supply and maintenance on P stocks in amazonian agricultural systems. However, there is few information about AFSs contribution to the distribution and lability of P in this ecosystem. The aim of this study was to evaluate the labile and moderately fractions of P (organic and inorganic) in the soil under oil palm cultivation (Elaeis guineensis), inserted in two organic Agroforestry Sistems with different plant composition. We determined P fractions using the sequential extraction method. The results showed that Agroforestry Sistems didn’t differ from conventional cultivation in the supply of easily-available P and promoted an increment of 20% in the supply of moderately available P in relation to conventional cultivation. The insertion of organic agroforestry systems in oil palm cultivation in the Amazon represents a promising type of management both for the supply of easily-available P and maintenance of P stocks in the soil by increasing moderately available P.
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