Características químicas de solo cultivado com soja e irrigado com água residuária da suinocultura

Abstract

RESUMONeste trabalho se avaliou a distribuição "in situ" de fósforo (P), matéria orgânica (MO), potássio (K), cálcio (Ca), magnésio (Mg), capacidade de troca catiônica (T), alumínio (Al), soma de bases (S), saturação por bases (V) e do pH, em um solo cultivado com soja irrigada com água residuária proveniente da suinocultura (ARS), com níveis de concentração de 0, 25, 50 e 75%. Constituiu-se um esquema fatorial a partir dos quatros níveis de concentração da ARS, das profundidades de 20, 40 e 60 cm com cinco repetições. Os resultados encontrados demonstraram diferenças significativas apenas para P, K e T no perfil do solo. Para todas as características na profundidade de 60 cm, os respectivos níveis de concentração estiveram bastante próximos aos níveis iniciais, ou seja, antes da aplicação dos tratamentos. Palavras-chave: poluição, lixiviação, meio ambienteChemical characteristics of the soil cultivated with soybean and irrigated with swine wastewater ABSTRACTIn this work the distribution was evaluated "in situ" of phosphorus (P), organic matter (MO), potassium (K), calcium (Ca), magnesium (Mg), cation exchange capacity (CEC), aluminum (Al), sum of bases (S), base saturation (V) and pH of a soil cultivated with soybean and irrigated with swine wastewater in the 0, 25, 50 and 75% levels. The factorial scheme was constituted by the 20, 40 and 60 cm soil depths and four wastewater levels with five repetitions. The results showed that significant difference occurred only for P, K and CEC in the soil profile. However, in all parameters, the 60 cm soil depth showed that the concentrations levels are similar to before the aplication of treatments.

Soil chemical properties and maize yield under application of pig slurry biofertilizer

“…Similar results were reported by Caovilla et al (2010), Medeiros et al (2011) and Homem et al (2014) in relation to the soil fertility properties. Caovilla et al (2010) found no significant changes in pH, base saturation, and concentrations of P, K + , Ca 2+ , and Mg 2+ in soil drip-irrigated with swine wastewater at different concentrations during soybean cultivation.…”

“…Caovilla et al (2010) found no significant changes in pH, base saturation, and concentrations of P, K + , Ca 2+ , and Mg 2+ in soil drip-irrigated with swine wastewater at different concentrations during soybean cultivation. Medeiros et al (2011) found that the use of swine wastewater for cotton irrigation did not alter pH, soil organic matter, P, Ca, Cu, and Zn in the topsoil (0-0.2 m).…”

Influência da fertirrigação por sulco utilizando água residuária e diferentes níveis de adubação na produtividade do feijoeiro

“…Para P, K,H+Al e Ca houve ajuste polinomial no qual os maiores valores observados foram de 65, 36,1; 54,3 e 70,64 % da dose recomendada respectivamente. Segundo Caovilla et al (2010) em estudos sobre as características químicas de solo com soja e irrigado com água residuária de suinocultura o solo não apresentou após o ciclo experimental aumentos nas suas características químicas, sendo observado apenas aumento de K e P na superfície do solo quando utilizados um sistema de irrigação por gotejamento.…”

Soybean nutritional status and seed physiological quality with swine wastewater

“…Residues from swine (Caovilla et al, 2010;Sampaio et al, 2010) and cattle (Ayuke et al, 2011) farming, for being rich in nutrients, can be used as biofertilizers in agriculture. In liquid form, these residues are more efficient when disposed on soil surface, supplying plants with water and nutrients (Caovilla et al, 2010;Sampaio et al, 2010).…”

“…In liquid form, these residues are more efficient when disposed on soil surface, supplying plants with water and nutrients (Caovilla et al, 2010;Sampaio et al, 2010). On the other hand, these residues in liquid form require more-detailed studies on their destination in the soil, because they can cause diffuse pollution, which is difficult to detect and control.…”