Effect of the incorporation of spent mushroom substrate and remineralizer on the chemical attributes of a Acrisol.

Abstract

We aim was to evaluate the chemical attributes of the soil under the effect of the incorporation of agronomic/lignocellulosic residues, in natura and spent/post-cultivation of mushrooms and the remineralizer from bentonite in Chromic Abruptic Acrisol, in the municipality of Areia, PB, Brazil. The research was carried out in a greenhouse and consisted of 13 treatments, resulting from a 3 × 2 × 2 + 1 factorial arrangement in CRD, with four replications. Data were evaluated for normality and homogeneity of variance using the of Shapiro-Wilk and Bartlett, and when significant then submitted to analysis of variance (ANOVA), Scott-Knott means test, and Dunnett at 5% significance. In addition, principal component analysis (PCA) and Pearson correlation were performed. The incorporation of agronomic wastes under in natura conditions and SMS with the remineralizer increased the fertility variables of the Chromic Abruptic Acrisol, with a significant increase in the levels of exchangeable bases, organic carbon, soil organic matter, cation exchange capacity, base saturation, and phosphorus available. The PCA showed that sugarcane bagasse and banana leaf treatments, both in the in natura condition and without incorporation of remineralizer, were the most correlated with the CEC, SB, and V% variables. Then, the application of lignocellulosic waste in the in natura and spent mushroom substrate (SMS) conditions without the use of a remineralizer increases total organic carbon and cation exchange capacity and phosphorus available.