Proportions of sewage sludge in the production and quality of Malpighia emarginata DC. seedlings

Abstract

Sewage sludge (SS) has nutritional contents and has been implemented in the cultivation of seedlings. This study aimed to evaluate the quality of Malpighia emarginata DC. seedlings produced in different substrates with SS. Treatments were implemented with the addition of SS, and after 180 days seedling the characteristics were measured: aerial part and root system length, stem base diameter, number of leaves, fresh and dry mass of aerial part and root, and total biomass. The Dickson Quality Index (DQI) was calculated and the macro and micronutrient content of the aerial part and root. The accumulation of macronutrients in the root system followed the order of N>K>P>Ca>Mg>S, and aerial part of N>Ca>K>P>Mg>S, in the two vegetative structures N and S were in lower concentration. For micronutrients, the accumulation in the root system occurred with Fe>Zn>Mn>Cu>B, and aerial part with Fe>Mn>Zn>B>Cu. It was noted that in the two vegetative structures the Fe content was more concentrated. The use of SS in the substrate formulation proved effective in obtaining viable seedlings for field planting, being recommended the treatment with 60% SS + 40% organic compost.

Use of sewage sludge in the production and quality of Jacaranda mimosifolia D. Don seedlings

“…In Brazil, environmental awareness among the population has stimulated the demand for native seedlings for reforestation and restoration of deforested areas, allowing efficient restoration of vegetation cover, which is essential for restoring ecological balance (GONÇALVES et al, 2015;FRE-ITAS et al, 2017;SOARES et al, 2017). Moreover, the demand for forestry products is increasing in Brazil, resulting in higher consumption of fertilizers in the production of seedlings and in planting (MORALES et al, 2013;PEREIRA;COSTA;ALMEIDA, 2018;SILVA et al, 2023). In this context, the use of organic components such as sewage sludge (SS), carbonized rice husks, coconut fiber, cattle manure, chicken litter, and quail droppings can help reduce the use of mineral fertilizers (GONDIM et al, 2019;MOTA et al, 2021;COSTA et al, 2023).…”