Stabilization time of chemical attributes and nutritional quality of manipueira for biofertilization

Autores

DOI:

https://doi.org/10.18227/1982-8470ragro.v17i00.7872

Palavras-chave:

Alternative fertilizer. Fertilizer effluent. By-product of Manihot esculenta Crantz.

Resumo

Manioc flour and gum (starch) have a cultural value for Amazonians. The processing of cassava roots releases manipueira, a liquid waste with a high polluting potential, due to its high levels of hydrocyanic acid. The large volumes of manipueira produced in this sector require safe disposal, whether for cooking (tucupi, flour), drinking or agronomic purposes. The aim of this study was to evaluate the stabilization time of chemical attributes and the nutritional quality of manipueira. For this study, cassava roots of the Amazonas cultivar (bitter or wild) harvested 12 months after the manioc was grown, were processed to extract the manipueira, which was stored and sampled at 0; 2; 5; 8; 11; 18; 25; 32; 46; 62 and 92 days. The variables evaluated were: pH and total cyanide content. Nutrients (N, P, K, Ca, Mg and S) were assessed at 0, 47, 62 and 92 days after storage (DAA). The pH stabilized at 10 DAA, varying between 3.8 and 4.0. The total cyanide content stabilized at 62 DAA, containing 410 mg L-1. The macronutrient contents did not vary with storage time, with the following decreasing order of concentration: K > N > P > Mg > Ca > S, corresponding to the contents: 7.49; 1.25; 1.06; 0.68; 0.41 and 0.18 g-1, respectively.

Biografia do Autor

Dr. Marcelo Hentges, Universidade Federal de Roraima - UFRR

Programa de Pós-Graduação em Agronomia-POSAGRO, Universidade Federal de Roraima.

Dr. José Maria Arcanjo Alves, Universidade Federal de Roraima - UFRR

Professor Titular. Depto. Fitotecnia/CCA/UFRR. Membro permanente do Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Dr. Luiz Fernandes Silva Dionísio, Universidade Federal de Roraima - UFRR

Professor Visitante do Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Dra. Deyse Cristina Oliveira da Silva, Universidade Federal de Roraima - UFRR

Bolsista de Pós-Doutoramento do Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Yenara Alves Guedes, Universidade Federal de Roraima - UFRR

Bolsista CAPES. Mestranda do Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Alberlan Ferreira Gomes, Universidade Federal de Roraima - UFRR

Bolsista PIBIC-CNPq, Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Dr. Paulo Roberto Ribeiro Rocha, Universidade Federal de Roraima - UFRR

Professor Titular. Depto. Fitotecnia/CCA/UFRR. Membro permanente do Programa de Pós-Graduação em Agronomia-POSAGRO/UFRR.

Downloads

Publicado

31/12/2023

Edição

Seção

Original Scientific Article