Autoria: WUADEN, C. R.; NICOLOSO, R. da S.; GRAVE, R. A.; PIGOSSO, A.

Resumo: ABSTRACT: We assessed the nitrogen use efficiency of maize amended with mineral and organic N sources in a Nitisol from Southern Brazil under contrasting soil tillage systems: conventional tillage (CT) and no-tillage (NT). The tested N sources were: 140 kg N ha-1 (total N input) either as mineral fertilizer (urea; MIN), pig slurry (PS), anaerobically digested pig slurry (ADS) and composted pig slurry (CS), besides a control without fertilization (CTR). The N-based application of PS and ADS supplied less than 74% of the maize requirements for P2O5 (115 kg ha-1 ), while CS exceeded P2O5 demand by up to 109%. PS and ADS promoted maize N uptake, biomass production and grain yield similar or higher than maize receiving mineral fertilizer (urea). However, CS promoted significantly lower N agronomic efficiency (AEN) and recovery efficiency (REN) than other fertilizers. CS should be primarily used as a source of P and K or as an amendment to recover SOM stocks in degraded soils.

Ano de publicação: 2017

Tipo de publicação: Artigo em anais e proceedings

Unidade: Embrapa Suínos e Aves

Palavras-chave: Biodigestão, Compostagem, Dejeto, Plantio, Suíno