This work aimed to evaluate the impacts on leachate from drainage lysimeters receiving application of different rates of pig farming residual water (PRW) during soybean crop cycle. The experiment was conducted at the Agricultural Engineering Experimental field of UNIOESTE. The soil was classified as Rhodic Ferralsols. There were twenty-four drainage lysimeters where soybean cultivar CD 214 was sown. Four PRW rates (0; 100; 200 and 300 m 3 ha -1) were applied to the soil seven days before sowing in a single application combined with two fertilizations (with and without recommended dose) during sowing, and three repetitions per treatment. Three leachate collections were carried out in each experimental plot. The first was conducted 40 days after sowing (DAS); the second at 72 DAS, and the third at the end of crop cycle (117 DAS). pH, calcium, magnesium, potassium, phosphorus, and total nitrogen were evaluated. Based on the results, it was possible to observe that pH and Mg values in the leachate did not suffer influence of PRW application and fertilization. K + , P and Ca +2 in the leachate were higher for higher PRW rates.

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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