Bahiagrass response and N loss from selected N fertilizer sources
作者： M. L. Silveira , J. M. B. Vendramini , B. Sellers , F. A. Monteiro , A. G. Artur
DOI: 10.1111/GFS.12078
关键词:
摘要: The increasing cost of commercial fertilizers and environmental problems associated with improper fertilization management have prompted the need to re-examine N sources that can effectively supply pastures while minimizing losses. This 3-year study evaluated effects selected on bahiagrass (Paspalum notatum Flugge) responses, soil properties Treatments consisted a factorial combination 6 [(i) ammonium nitrate (AN), (ii) sulphate (AS), (iii) urea (U), (iv) treated Agrotain (U + Agrotain), (v) SuperU (vi) nitrate] 3 levels (0, 60 or 120 kg ha−1 year−1), replicated three times. Bahiagrass dry-matter yield (DMY), crude protein (CP) concentration, uptake recovery were not affected by source, exception AN resulted in reduced DMY 2010 compared other sources. DMY, CP increased linearly as increased. Nitrogen showed no effect pH accumulation. Soil pore-water concentrations from treatments fertilized similar control plots indicating threat environment. At this study, selection source should be based fertilizer cost.
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