Potencial dos biossólidos como substratos na produção de mudas do açaizeiro BRS Pai d'Égua (Euterpe oleracea Mart.)

Abstract

This study evaluated the effectiveness of using biosolids as a substrate in seedling production of the açaí cultivar BRS Pai d'Égua (Euterpe oleracea Mart.), focusing on its effects on growth. The experiment was conducted in a randomized complete block design (RBD) with 17 treatments and four replicates, totaling 68 experimental units. Treatments consisted of different proportions of biosolids, alone or in combination with cattle manure, soil, commercial substrate, and soil-manure mixture, as well as controls without biosolids. Statistical analysis was performed using the Scott–Knott test at 5% probability, using R software. Treatments T11 (50% biosolids + 50% commercial substrate) and T14 (75% biosolids + 25% soil + manure) provided the highest values of height, stem diameter, height/diameter (H/D) ratio, SPAD index, and leaf pigment concentration. It is concluded that the use of biosolids, alone or in mixtures, represents a viable and environmentally sustainable technical alternative for the production of açaí seedlings.