Mariana Ferreira Rabelo FERNANDES, Regynaldo Arruda SAMPAMPAIO, Essaid BILAL, Jatnel Alonso LAZO Luiz Arnaldo FERNANDES (BRASIL, FRANCE, CUBA)
Abstract. We examine in this study a possibility of use the biodiesel industry waste as a source of nutrients for the production and development of seedlings seems like a very good option. We added the diatomaceous earth residues of Biodiesel with sludge from urban wastewater treatment or manure to stimulate the activity of soil bacterial. The Dickson Quality Index (DQI) values Eucalyptus Camaladulensis and Morus Alba seedlings growing in test substrates with sewage sludge and diatomaceous earth are all higher than the recommended minimum value of 0.2. The treatments with manure and diatomaceous earth do not meet the desired quality standard. The Eucalyptus Camaladulensis and Morus Alba seedlings have good growth in substrates containing sewage sludge and diatomaceous earth than only the commercial substrate. They can use up to 50% by volume of the substrate without compromising the seedlings quality with a reduction of cost of seedlings production.
Keyword: diatomaceous earth, Dickson Quality Index, Eucalyptus Camaladulensis and Morus Alba.