Influence of vinasse application in hydraulic conductivity of three soils

Abstract

ABSTRACT:The potassium ion, present in great amount in the vinasse because it is a monovalent cation, has the characteristic of promoting the dispersion of clay particles, in the same way as the sodium, causing a reduction in the pore space of the soil and, in its turn, reducing its permeability. To evaluate this effect of reduction by application of vinasse to the soil, an experiment was conducted for three different soils, with the objective of evaluating the effect of the application of different doses of vinasse on hydraulic conductivity of saturated soil and verifying its possible chemical changes of these soils. For that, it was used PVC columns (in a scheme of constant head permeameter to obtain the values of hydraulic conductivity of saturated soil), filled with three soils -Dark Red Latosol (DRL), Purple Latosol (PL) and Eutrophic Red Nitossol (ERN) -, in which were applied four doses of vinasse (0, 150, 300 and 450m 3 ha -1 ), distributed in a completely randomized design with a 3x4 factorial scheme with three replications. The results evidenced that only the Dark Red Latosol (DRL) showed a reduction in the values of hydraulic conductivity of saturated soil, and in front of the application of vinasse, up to 300m 3 ha -1 , it was observed an increase in the concentrations of potassium, calcium and cation exchange capacity (CEC) ions. KEYWORDS:Clay dispersion, Potassium, Soil permeability. INFLUÊNCIA DA APLICAÇÃO DE VINHAÇA NA CONDUTIVIDADE HIDRÁULICA DE TRÊS SOLOSRESUMO: O íon potássio, presente em grande quantidade na vinhaça, por se tratar de um cátion monovalente, tem a característica de promover a dispersão das partículas de argila, assim como o sódio, provocando redução do espaço poroso do solo e, por sua vez, reduzindo sua permeabilidade. Para avaliar este efeito de redução mediante a aplicação de vinhaça ao solo, realizou-se um experimento para três diferentes solos, com o objetivo de avaliar o efeito da aplicação de diferentes doses de vinhaça na condutividade hidráulica do solo saturado e verificar suas possíveis alterações químicas, destes solos. Para tal, foram utilizadas colunas de PVC (em um esquema de permeâmetro de carga constante para a obtenção dos valores da condutividade hidráulica do solo saturado), preenchidas com três solos (Latossolo Vermelho-Escuro -LVE, Latossolo Roxo -LR e Nitossolo Vermelho Eutrófico -NVE), nas quais foram aplicadas quatro doses de vinhaça (0; 150; 300 e 450 m 3 ha -1 ), distribuídas em um delineamento inteiramente casualizado, em esquema fatorial 3x4, com três repetições. Os resultados evidenciaram que apenas o Latossolo Vermelho-Escuro (LVE) apresentou redução nos valores da condutividade hidráulica do solo saturado e que, diante de aplicações de vinhaça, até 300 m 3 ha -1 , observou-se incremento nas concentrações dos íons potássio, cálcio e capacidade de troca catiônica (CTC). PALAVRAS-CHAVE:dispersão da argila; potássio; permeabilidade do solo.

Fertirrigation with sugarcane vinasse: Foreseeing potential impacts on soil and water resources through vinasse characterization

“…[25,27] The content of potassium in soils commonly used in the cultivation of sugarcane accounts for less than 5% of the soil's cation exchange capacity (CEC). [15,16,28] Consequently, the application of sugarcane vinasse is an attractive alternative to mineral fertilization, enabling reductions of approximately 50% in the application of synthetic fertilizers in terms of supplying potassium. [29] However, the transportation of vinasse to the agricultural field (either using trucks or pipelines) depends strictly on the radius of economic distribution, [30] which limits the distance from which the transportation of the effluent is economically unfeasible (Fig.…”

“…Fertirrigation is virtually characterized as the only approach for the management of vinasse in Brazil; there are two main drawbacks of this practice, considering both environmental and energetic aspects. First, although some studies indicate beneficial results from the land disposal of vinasse, [14][15][16] considering short-term applications (i.e., from a few months to two to three years), its continuous disposal in sugarcane crops tends to generate a wide range of negative effects on soils, water resources and crops due to the polluting characteristics of vinasse. [3] Second, the high biodegradable organic content usually found in vinasse characterizes this wastewater as a highly energetic byproduct from the ethanol production chain; thus, fertigation also promotes a bioenergy loss.…”

Early Growth of Coffee Plants and Soil Fertility Properties in Response to Coffee Husk Application

“…The incidence of diseases such as brown eye spot and rust in coffee plants is also favored by nutritional imbalance, with very high K contents in soil and plant leaves, due to coffee husk applications (SANTOS et al, 2008). Excessive K + contents in the soil can also promote the dispersion of clay particles, reducing the porosity and affecting other soil physical properties (UYEDA et al, 2013).…”

Effect of Initial pH and Organic Matter Concentration on Production of Volatile Organic Acids Through Acidogenesis of Sugarcane Vinasse

“…Some previous studies has already pointed out that use of vinasse as a fertilizer may have positive consequences for sugarcane crops (BRITO et al ., 2009; JIANG et al ., 2012; UYEDA et al ., 2013; PREVINA & SARAVANAM, 2013; FUESS e GARCIA, 2014), which is its main use nowadays. However, Fuess and Garcia (2014) highlighted some important disadvantages, mostly observed if vinasse is continuously disposed on soil, namely salinization and sodification, organic overloading, permanent acidification of water bodies, interference in the photosynthesis of aquatic plants and inhibition of seed germination.…”