BIOFERTILIZANTE PARA A CULTURA DO COENTRO-COMUM (Coriandrum sativum) UTILIZANDO RESÍDUO DO PROCESSAMENTO DA MANDIOCA (Manihot esculenta)

Abstract

Manipueira is a cassava processing residue with a polluting potential, and it is crucial to find alternatives for its disposal and reuse. The present study aimed to investigate the potential of this residue as a biofertilizer, through the fertirrigation method, in the culture of common coriander (C. sativum). The research took place through the dilution of manipueira in water in 9 concentrations, from 10% to 90%; in addition, there was the conservation of samples with 0%, containing only water, and 100%, containing pure manipueira. The results showed that coriander seeds fertirrigated with solutions above 70% presented larval emergence in the soil after the 18th day; Another important piece of data is that on the 20th day, the death of all specimens fertirrigated with solutions above 30% was observed, this fact being preceded by leaf stunting (solutions above 80%) and yellowing of leaves. These data can be explained by the soil sodification process (pH > 8.5), which occurred in these samples. Furthermore, all samples did not stabilize the pH within the optimal zone for most cultures (between 5.5 and 7.0), which may explain the death of the specimens on the 25th day. That said, the environmental impact of manipueira on the germination process and botanical development is reinforced, which reiterates the importance of research that aims to find alternatives for the reuse of this residue. Thus, it is necessary to deepen research and even expand the range of cultures tested in each dilution.