Growth of pau viola (Cytharexyllum myrianthum) seedlings are potentialized using waste from the treat-ment of domestic sewage

Abstract

Sewage sludge is a waste rich in organic matter and mineral nutrients generated at Sewage Treatment Stations. Generally, this waste is deposited in landfills, increasing the volume of disposal at the site, and therefore the levels of pollution. No less important, it is a material that is lost and could be reused as fertilizer for the forestry and agricultural sector. However, more studies are pertinent to make its use feasible, especially in nurseries that produce native seedlings. The objective of this work was to evaluate the development of pau viola (Cytharexyllum myrianthum), in relation to composted sewage sludge (LEC) and commercial substrate (SC), testing two types of water, waste and supply. The following biometric parameters were obtained: height, stem diameter and number of leaves, as well as dry matter production (root and aerial part). The results revealed that there was no significant difference between the treatments evaluated. Among the types of water, the wastewater seedlings developed more, obtaining seedlings with higher values of height, number of leaves, diameter of the root collar and dry matter of the leaves and root. To produce pau viola seedlings, it is advisable to use the combination of LEC and the use of wastewater for irrigation. We believed that following these recommendations there will be a reduction in nursery costs to the production of pau viola seedlings and a reduction in the disposal of this waste in the environment.