Use of cassava wastewater treated anaerobically with alkaline agents as fertilizer for maize (Zea mays L.)

Abstract

The wastewater of the processing of cassava's flour (manipueira) 64, 54, 80 and 78% for T3, T4, T5 and T6, respectively.

Macronutrient and sodium content in maize plants under cassava wastewater fertilization

“…Evaluating the effect caused by the application of treated cassava wastewater on corn development, Ribas et al (2010) observed that the N content in the leaf tissues of plants that received cassava wastewater was superior to that in the control treatment, at 37 DAE, but these contents remained below those considered as adequate for the corn crop, according to IPA (2008), which was also observed in the present study. On the other hand, Inuoe et al (2011) reported no increase in leaf N content in corn plants due to the increment in the doses of treated cassava wastewater.…”

“…In the study, these authors mention that the dose of 45 m 3 ha -1 promoted the best plant development. Similar responses were obtained by Ribas et al (2010) and Inoue et al (2011).…”

“…Studying the effect of cassava wastewater on corn fertilization, Ribas et al (2010) also observed that the application of the organic residue caused inhibition in the absorption of Ca and Mg by the plants during the initial development stage. Simonete et al (2003), evaluating the effect of another organic residue on corn growth and nutrition, reported that the amounts of Ca and Mg accumulated by plants increased with the application of the residue; however, the complementation with K fertilization decreased the absorption of Ca and Mg by plants, thus evidencing, as observed in the present study, the antagonism of K when in high concentrations in relation to the absorption of Ca and Mg by corn plants.…”

Desenvolvimento inicial do milho submetido à adubação com manipueira

“…Altura das plantas (A), diâmetro do colmo (B) e número de folhas (C) do milho forrageiro AG 1051 em função das doses de manipueira ao solo o uso de manipueira e os parâmetros altura, diâmetro e número de folhas da bananeira, embora tenha ocorrido aumento na produtividade da cultura. No presente estudo a altura das plantas, o número de folhas e o diâmetro do colmo apresentaram resposta semelhante à obtida por Ribas et al (2010) quando estudaram o desenvolvimento de plantas de milho submetidas às doses crescentes de efluente de fecularia em substituição à adubação mineral.…”

“…Respostas positivas com relação ao reaproveitamento de resíduos agroindustriais na agricultura vêm sendo obtidas por diversos autores, como Silva et al (2008); Inoue et al (2011) e Ribas et al (2010), entre outros; entretanto, quando aplicados em doses inadequadas, os resíduos podem ser prejudiciais ao solo e às culturas, bem como contaminar as águas subterrâneas e superficiais em virtude da alta carga orgânica e excesso de nutrientes e sais presentes.…”