Lixiviação de nutrientes provenientes de águas residuárias em colunas de solo cultivado com soja

The application of swine wastewater to the soil for agricultural purposes results in the addition of total and dissolved organic matter to the soil, which may interfere with the dynamics of pesticides in the soil. The objective of this study was to evaluate the effects of the application of total and dissolved organic matter from a biodigester and a treatment lagoon of swine wastewater in the adsorption and desorption of alachlor [2-chloro-2,6-diethyl-N(methoxymethyl acetamide)]. The assay was performed by the batch equilibrium method, and the results were fitted to the Freundlich model. The curve comparison test revealed a greater adsorption of alachlor in the soil treated with swine wastewater from the biodigester. The adsorption and desorption of alachlor increased in the soils where swine wastewater was added, and hysteresis was observed in all of the treatments.

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Effects of the organic matter from swine wastewater on the adsorption and desorption of alachlor in soil

Bosco

Sampaio

Coelho

et al. 2012

Journal of Environmental Science and Health, Part B

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Estudo da associação de água residuária de suinocultura e adubação mineral na cultura do milho e no solo

Prior¹,

Sampaio²,

Nóbrega³

et al. 2015

Eng. Agríc.

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RESUMO: O uso de água residuária em solo agrícola pode-se caracterizar como uma fonte alternativa de adubação, além de melhorar as condições edáficas do solo devido à matéria orgânica adicionada. Neste contexto, este trabalho teve por objetivo avaliar os efeitos na cultura do milho e em Latossolo Vermelho distroférrico típico, devido à aplicação de água residuária de suinocultura associada com adubação química. No experimento, utilizou-se de cinco doses de ARS (0; 112,5; 225; 337,5 e 450 m 3 ha -1 ) durante o ciclo do milho, combinadas com duas adubações químicas (50 e 75% da dose recomendada), para compor os respectivos tratamentos, com três repetições. Os parâmetros da cultura do milho avaliados foram: produtividade (PROD), altura de plantas (AP), teor de macronutrientes (N, P, K e Mg) e de micronutrientes (Fe, Zn, Cu e B). Os parâmetros de solo avaliados foram: conteúdo de matéria orgânica (MO), soma e saturação por bases (SB e V), pH e teores disponíveis de N, P, K, Cu, Zn, Fe e Mn. A partir dos resultados obtidos, concluiu-se que: na cultura do milho, a aplicação de água residuária da suinocultura é fator predominante no aumento da produtividade e na nutrição mineral em K, Mg, Fe, Cu e B, e insuficiente para N e P; no solo, de modo geral, a água residuária da suinocultura propiciou aumentos positivos nos parâmetros de P, Zn, Cu, pH e SB, negativos nos teores de K e Fe, e nenhum efeito nos parâmetros N, V, MO e Mn; os parâmetros P, Cu e Zn aumentaram significativamente os teores no solo ao longo do experimento, indicando a importância do fator tempo nesse tipo de estudo. PALAVRAS-CHAVE: reúso de água; resíduo animal, valorização agronômica. ESTUDY OF ASSOCIATION BETWEEN SWINE WASTEWATER AND CHEMICAL FERTILIZER IN CORN AND SOIL ABSTRACT:The use of wastewater in agricultural soil can be characterized as an alternative source of fertilizer, and improve soil conditions due to soil organic matter added. In this context, this study aimed to evaluate the effects on corn and in a Hapludox soil due to application of swine wastewater associated with chemical fertilizers. In the experiment, it was used five doses of swine wastewater (0, 112.5, 225, 337.5 and 450 m 3 ha -1 ) during the corn cycle, combined with two chemical fertilizer (50 and 75% of the recommended dose) to compose their treatments with three replicates. The parameters of maize crop were: productivity, plant height, macro nutrients (N, P, K and Mg) and micronutrients (Fe, Zn, Cu and B). The soil parameters were: organic matter, pH, N, P, K, sum of bases, base saturation, Cu, Zn, Fe and Mn. From the results it was concluded that: the culture of corn, the application of swine wastewater is the predominant factor in increasing productivity and mineral nutrition in K, Mg, Fe, Cu and B and insufficient for N and P; in the soil, generally, swine wastewater has positive increases in parameters of P, Zn, Cu, SB and pH, negative levels of K and Fe and no effect on the parameters N, V, MO and Mn; the time factor is extremely important in this type of study, for t...

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Soluble carbon in oxisol under the effect of organic residue rates

Pinheiro

Silva²,

Lima³

2014

Rev. Bras. Ciênc. Solo

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SUMMARYThe application of organic residues to the soil can increase soluble organic carbon (SOC) and affect the pH and electrolytic conductivity (EC) of the soil. However, the magnitude of these changes depends on the type of residue and the applied dose. This study aimed to evaluate the effect of increasing C rates contained in organic residue on the pH, EC, water-extractable total carbon (WETC), waterextractable organic carbon (WEOC), and water-extractable inorganic carbon (WEIC) in soil treated with manure (chicken, swine, and quail), sawdust, coffee husk, and sewage sludge. The levels of total C (TC-KH 2 PO 4 ), organic carbon (OC-KH 2 PO 4 ), and inorganic C (IC-KH 2 PO 4 ) extractable by a 0.1 mol L -1 KH 2 PO 4 solution were also quantified in soil under the effect of increasing rates of chicken and quail manures. The following rates of organic residue C were applied to a dystrophic Red Latosol (Oxisol) sample: 0, 2,000, 5,000, 10,000, and 20,000 mg kg -1 . The addition of organic residues to the soil increased pH, except in the case of sewage sludge, which acidified the soil. The acidity correction potential of chicken and quail manure was highest, dependent on the manure rate applied; regardless of the dose used, sawdust barely alters the soil pH. At all tested rates, the EC of the soil treated with swine manure, coffee husk, and sawdust remained below 2.0 dS m -1 , which is a critical level for salinity-sensitive crops. However, the application of chicken or quail manure and sewage sludge at certain rates increased the EC to values above this threshold level. Highest levels of WETC, WEOC, and WEIC were obtained when chicken and quail manure and coffee husk were applied to the Oxisol. The quantities of SOC extracted by KH 2 PO 4 were higher than the quantities extracted by water, demonstrating the ability of soil to adsorb C into its colloids.Index terms: soluble organic carbon, manure, electrolytic conductivity, soil acidity, crop residues, carbon adsorption.( RESUMO: CARBONO SOLÚVEL EM LATOSSOLO SOB EFEITO DE DOSES DE RESÍDUOS ORGÂNICOSA adição de resíduos orgânicos pode aumentar o carbono orgânico solúvel (COS) e alterar o pH e a condutividade elétrolítica (CE) do solo, mas a magnitude dessas variações depende do resíduo e de sua dose aplicada. Objetivou-se avaliar o efeito de doses de carbono pela adição de resíduos orgânicos sobre o pH, a CE, o carbono total extraível por água (CTEA), o carbono orgânico extraível por água (COEA) e o carbono inorgânico extraível por água (CIEA), em solo tratado com estercos (galinha, suíno e codorna), serragem, casca de café e lodo de esgoto. Os teores de C total (CT-KH 2 PO 4 ), C orgânico (CO-KH 2 PO 4 ) e C inorgânico (CI-KH 2 PO 4 ) extraível por solução de KH 2 PO 4 0,1 mol L -1 também foram quantificados em solo sob efeito de doses crescentes de estercos de galinha e de codorna. O solo utilizado foi o Latossolo Vermelho distroférrico (LVdf) e as doses de C-resíduo orgânico constituíram-se de 0, 2.000, 5.000, 10.000 e 20.000 mg kg -1 . A adição de resíduos org...

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Lixiviação de nutrientes provenientes de águas residuárias em colunas de solo cultivado com soja

Cited by 15 publications

References 8 publications

Effects of the organic matter from swine wastewater on the adsorption and desorption of alachlor in soil

Effects of the organic matter from swine wastewater on the adsorption and desorption of alachlor in soil

Estudo da associação de água residuária de suinocultura e adubação mineral na cultura do milho e no solo

Soluble carbon in oxisol under the effect of organic residue rates

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