Desenvolvimento inicial do milho submetido à adubação com manipueira

Abstract

R E S U M OObjetivou-se, com este estudo, verificar o efeito da adubação utilizando manipueira no desenvolvimento inicial do milho. O experimento foi conduzido em ambiente protegido na UFRPE, Recife, PE. Os tratamentos constaram de um arranjo fatorial 5 x 3, sendo 5 doses de manipueira equivalentes a: 0; 12,6; 25,2; 50,4 e 75,6 m 3 ha -1 e 3 idades de corte: aos 20, 40 e aos 52 dias após a germinação -DAG, com quatro repetições, em delineamento inteiramente casualizado. Utilizou-se um híbrido de milho forrageiro, AG 1051, dispondo uma planta por vaso de 20 L. Foram avaliados: altura das plantas, diâmetro do colmo, número de folhas, matéria fresca e matéria seca das folhas e colmo do milho. A dose equivalente a 63 m 3 ha -1 propiciou maior ganho de diâmetro de colmo, número de folhas, massa fresca e massa seca de folhas, enquanto a dose equivalente a 75,63 m 3 ha -1 proporcionou incremento significativo nos demais parâmetros fenológicos avaliados. Assim, o uso da manipueira serviu como fonte de adubação para a cultura do milho cujas respostas dependeram da utilização de doses adequadas do resíduo. Maize growth under cassava wastewater fertilization A B S T R A C TThis research aimed to evaluate the effect of cassava wastewater fertilization on maize growth. The experiment was carried out under greenhouse conditions at the Federal Rural University of Pernambuco (Brazil). Treatments were assigned in a factorial arrangement 5 x 3, being 5 cassava wastewater doses: 0, 12.6, 25.2, 50.4 and 75.6 m 3 ha -1 and 3 harvest ages: 20, 40, and 52 days after germination (DAG), in a completely randomized design, with four replications. A hybrid of forage maize (AG 1051) was used, keeping one plant in a 20 L pot. The variables evaluated were: plant height, stalk diameter, number of leaves, dry and fresh matter of leaves and stalks. The dose equivalent to 63 m 3 ha -1 provided the highest gain in stalk diameter, number of leaves, dry and fresh matter of leaves; while the dose equivalent to 75.63 m 3 ha -1 provided significant increase in the other evaluated phenological parameters. Cassava wastewater presented as a useful fertilization source for maize crop, however responses depended on utilization of appropriated cassava wastewater doses. ISSN 1807ISSN -1929ISSN v.18, n.7, p.675-681, 2014 Introdução O desenvolvimento da agroindústria resultou em uma quantidade de resíduos gerada que se tornou motivo de preocupação uma vez que, comumente, esses tipos de resíduo são de difícil gestão. Diante das dificuldades encontradas no manejo dos resíduos agroindustriais o reaproveitamento vem sendo considerado um instrumento de gestão inovador cuja característica principal é proteger os recursos naturais existentes. PalavrasO reúso de resíduos advindos de atividades agroindustriais vem sendo encorajado como forma de diminuir a poluição ambiental causada pelo descarte indiscriminado e entre as medidas propostas para o gerenciamento de tais resíduos, está sua reutilização em substituição à adubação mineral na produção agrícola (Damasceno...

Effect of biofertilizer obtained by anaerobic digestion of cassava effluent on the development of crambe plants

“…Ambiental, v.21, n.10, p.681-685, 2017. Magalhães et al (2014) reported an increase in the stem diameter with lower cassava effluent doses, and a decrease with increased doses; for example, they observed a decrease at the dose of 63 m 3 ha -1 . In addition, they reported an adverse effect on the absorption of other elements, such as calcium, magnesium, zinc, and manganese by the plant, if they are present in excess, possibly because of the high concentration of the potassium ion in the effluent (Malavolta et al, 1997).…”

“…Dantas et al (2015) evaluated the growth of sunflower using cassava effluent and found that the factors related to plant growth increased with greater applied doses of this effluent. Magalhães et al (2014) investigated the use of the same effluent to promote the development of corn, confirming that it can be used as a source of fertilizer whose efficiency depends on the use of appropriate doses of the residue.…”

“…However, they can be efficiently used in agriculture to promote soil fertility and treat nutritional deficiency, because they are rabidly absorbed by plants (Nobile & Mussi, 2013;Magalhães et al, 2014). Dantas et al (2015) evaluated the growth of sunflower using cassava effluent and found that the factors related to plant growth increased with greater applied doses of this effluent.…”

Initial Growth of Corn Using Human Urine, Cassava Wastewater and Cattle Manure as Source of Nutrients

“…Considering the agro-industrial development and generation of large amounts of organic residues with high polluting potential to the environment (330 million tons, on average) along the productive chain of various products, the reuse of these residues in agriculture has been considered as one way to attenuate the environmental impacts inherent to their disposal in the environment, besides pointing to a new, promising use of these residues (Morais et al, 2012;Virmond, 2011;Damasceno et al, 2003;Magalhães et al, 2014).…”

“…Authors such as Barreto et al (2014) and Magalhães et al (2014) evaluated the effects of using cassava waste-water as source of nutrients in agricultural production and observed significant results up to a certain volume threshold. Akpan-Idiok et al (2012) and Araújo et al (2015) observed increments in plant green matter applying human urine through irrigation.…”