EFFECT OF TANNERY SLUDGE AND COFFEE CHAFF ON THE EMERGENCY OF TOMATO SEEDLINGS

Abstract

Technologies and protection of the environment generate interest in creating appropriate solutions to reduce the negative environmental impacts of waste generation. For this reason, the agricultural use of tannery sludge has been the subject of several studies, as well as the coffee mill, due to the presence of organic matter and nutrients. For this reason, the objective was to evaluate the effects of substrates containing different proportions of tannery sludge and coffee grinder in the emergence of tomato seedlings. The experiment was conducted in a randomized block design, involving the production of 480 seedlings. At 16 days after sowing, emerged seedlings were counted. Proportionally with the increasing additions of tannery sludge to the mixture with a coffee mill, there was a decrease in the averages of the emergence variable, this behavior being attributed to sodium, which may have negatively interfered in the germinative potential of the seeds. However, the residues under study promoted a good emergence of tomato seedlings, presenting results similar to the use of the commercial substrate. Finally, the use of the tannery sludge mixed with the coffee mill provided an emergence of tomato seedlings, acceptable from the agricultural point of view.