Visual diagnosis of açaí trees under soilless cultivation in the Amazon

Abstract

The açaí tree culture is extremely important for the Northern Region of Brazil, therefore, the aim of this work was to evaluate the nutritional status through visual diagnosis of açaí tree leaves. Therefore, the objective of the work was to analyze the development of açaí seedlings, with the omission of macro and micronutrients, characterizing the visual symptoms observed on the leaves of the plants, in this case only for N, P and K. The study was carried out in a greenhouse, which is located at the Federal Institute of Pará (IFPA), Campus Castanhal – PA. A completely randomized experimental design (DIC) was used, with 11 treatments and 5 replications, totaling 55 experimental units. The treatments were: Complete treatment (With all nutrients), Omission of Nitrogen (-N), Omission of Phosphorus (-P), Omission of Potassium (-K), Omission of (-Ca), Omission of Magnesium (-Mg ), Sulfur Omission (-S), Iron Omission (-Fe), Zinc Omission (-Zn), Boron Omission (-B) and Copper Omission (-Cu). The results after application were that the characterization of the visual symptoms of deficiencies that were evident in the leaves of the açaí seedlings, a limitation in the development of the seedlings was observed.