Fertilization of high-yield corn with poultry litter based on nitrogen doses

• Autor(a) principal: Correa, Juliano Corulli
• Data de Publicação: 2018
• Outros Autores: Grohskopf, Marco Andre [UNESP], Rebellatto, Agostinho, Rigo, Amanda Zolet, Coldebella, Arlei
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0100-204X2018000300009; http://hdl.handle.net/11449/160306
• topic: no-tillage farming; organic waste; pelletized fertilizer; powder fertilizer

The objective of this work was to recommend nitrogen doses from poultry litter-based organic fertilizers in powder and pellet forms, compared with mineral fertilizer, in a high-yield corn crop under notillage. The treatments consisted of a 3x3+1 factorial arrangement, with: three fertilizers, two organic derived from poultry litter in powder (OPo) and pelletized (OPe) forms and one mineral fertilizer (M); three N doses of 65, 100, and 135% of the recommended N requirement for corn; and an unfertilized control. After five corn crops farmed under no-tillage in a Rhodic Kandiudox, the recommended doses for fertilization with poultry litter organic fertilizers, with an expected yield equal to or greater than 8,000 kg ha(-1), could be achieved from doses of 100 kg ha(-1) N in OPe and M and of 121 kg ha(-1) N in OPo. Increasing doses of the OPe, OPo, and M fertilizers raise the contents of organic carbon, N, and available P in the surface soil layer (0.0-0.1 m) and of exchangeable K up to a depth of 0.2 m, allowing to obtain N, P, and K contents in the plant tissue within the sufficiency range of the corn crop.