Liberação do N em solos de diferentes texturas com ou sem adubos orgânicos
作者： Claudio Fioreze , Carlos Alberto Ceretta , Sandro José Giacomini , Gustavo Trentin , Felipe Lorensini
DOI: 10.1590/S0103-84782012005000045
关键词:
摘要: The N release in the soil with organic fertilization is affected by various factors, such as amount and caractheristics of added manure, climatic conditions type. This study aimed to evaluate effect texture from two sources fertilizer. Sandy loam (238mg clay kg-1), silt (470mg kg-1) very-clay (605mg were incubated, which poultry litter (47% N-NH4+) pig liquid slurry (14% or not. contents N-NH4+ N-NO3- was determined at 0, 7, 14, 28, 56 112 days after incubation calculated net mineralization percentage available mineral nitrogen relation total N, respectively. higher caused more gradually nitrification, regardless type fertilizer added, may helps reduce polluting potential N. also sandy soil. confirms recommendation spread supply crops, particularly soils rich N-ammonia. results indicated that official indices efficiency (IELN), 80% for 50% litter, be overestimated. Therefore, it seems important consider calculation depletion matter a medium long term. Finally, point need further studies so classes are considered variable recommended through fertilizers.
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