Nitrogen fertilization by deep bedding swine production and its effects on dry matter production and accumulation of nutrients by maize

Abstract

ABSTRACT:The goal of this study was to evaluate the nitrogen fertilization as deep litter for pigs in order to produce biomass and accumulate nutrients by the corn. A deep litter made of rice husk as organic compound, from a commercial pig farm during finishing phase, was used. After three consecutive batches of pigs, the deep litter was subjected to a maturation period of 50 days, and samples of this material were taken for analysis of agronomic value. The experimental design was completely randomized with five replicates. The treatments consisted of doses of 0, 75, 150 and 300mg dm -3 of N of deep litter, as well as an additional treatment with ammonium sulfate, with a dosage of 150mg dm -3 of N. After 45 days, corn plants were harvested in order to evaluate the total dry weight and nutrient concentrations of their aerial parts. Dry matter increases were found with more application of deep litter. Regarding control fertilization, the use of increasing dosages of deep litter allowed accumulation of K, reduced the availability of P, Ca, Mg, Zn and B and did not alter the concentrations of N, Cu, Fe and Mn.

Produção De Biogás Proveniente De Camas Sobrepostas De Suínos

“…Entretanto, a cama que sai das instalações, após passar por três lotes de animais, em média, não se encontra totalmente estabilizada para uso como composto, conforme constatado por Campos et al (2012) e Campos et al (2013). Uma forma de se complementar a estabilização do material, pode ser o uso de biodigestores, onde se agrega, ainda, a possibilidade de geração de energia, na forma de biogás, que pode ser empregada na suinocultura, tanto para a geração de calor, quanto para a conversão em energia elétrica, por meio de conjuntos moto-geradores (SOUZA; SILVA; BASTOS, 2010).…”