Use of different residues in growth of seedlings of Mimosa setosa

Abstract

The aim of this study was to evaluate the growth of seedlings of Mimosa setosa using different combinations of renewable residues: sewage sludge, carbonized rice husks and straw of coffee in natura, and commercial substrate. The seedlings were grown in plastic tubes with capacity of 120 cm³, remaining 120 days under shadow in a greenhouse and more 30 days in rustification area. When the seedlings reached 150 days of growth it were measured the shoot height, the diameter, the ratio of shoot height and diameter, the shoot dry weight, the root dry weight, the total dry mass, the ratio dry shoot mass and root dry mass and the Dickson quality index. The data were subjected to statistical analysis (ANOVA) and the means were compared by the Scott-Knott test, at 5% probability. The substrates made with sewage sludge, carbonized rice husks and straw of coffee provided better growth of seedlings. Moreover, the treatment with 80% of sewage sludge mixed with 10% carbonized rice husks and 10% straw of coffee in natura provided the best results of the morphological characteristics evaluated, when producing Mimosa setosa seedlings.