Abstract
To evaluate the nutritional status of açaí plants, through leaf analysis, in açaí-do-amazonas agroecosystems, in Codajás, leaf concentrations of Ca, Mg, N, P, K, Fe, Mn and Zn were determined. The experimental design was completely randomized (DIC), with four management systems (extractive forest, managed forest, monoculture and agroforestry consortium) and four replications. The average concentrations of leaf macro and micronutrients were subjected to analysis of variance, with the means compared using the Tukey test at the 5% level. Correlation analysis and sustainability assessment (Mulamba-Rank index) were carried out. No significant differences were found between management systems for foliar macro and micronutrients, except for Fe. There was a significant correlation between Mg-Fe, P-Mg and N-Fe. Ca and Zn may be limiting the production of açaí palms in the systems evaluated. The extractive forest was the most sustainable system in the nutritional assessment of açaí plants.
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