01723nam a2200205 a 450000100080000000500110000800800410001910000180006024501190007826002070019752009900040465000160139465000110141065000120142165000110143365300170144470000230146170000170148470000160150120783382018-05-09       2017    bl uuuu     u00u1 u    #d1 aWUADEN, C. R.  aMaize nitrogen use efficiency is affected by pig slurry composting and anaerobic digestion.h[electronic resource]  aIn: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS AGROPECUÁRIOS E AGROINDUSTRIAIS, 5., 2017, Foz do Iguaçu, Anais... Concórdia: Sbera: Embrapa Suínos e Aves, 2017. SIGERA. p. 28-31.c2017  aABSTRACT: 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.  aCompostagem  aDejeto  aPlantio  aSuíno  aBiodigestão1 aNICOLOSO, R. da S.1 aGRAVE, R. A.1 aPIGOSSO, A.