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- Title
Nitrogen availability and leaching from soil amended with municipal solid waste compost
- Authors
Mamo, M.; Rosen, C. J.; Halbach, T. R.
- Abstract
Beneficial use of municipal solid waste compost depends on identifying a management strategy that supports crop production and protects water quality. Effects of compost and N fertilizer management strategies on corn (zea mays L.) yield and NO-3-N leaching were evaluated in a 3-yr study on a Hubbard loamy sand soil (sandy, mixed, Udorthentic Haploboroll). Two composts were each applied ateither 90 Mg ha-1 yr-1 from 1993 to 1995, or at 270 Mg ha-1 in one application in 1993. The compost and non-amended plots were sidedressed annually with N fertilizer as ureaat 0, 125, and 250 kg ha-1. Biochemical properties of thecompost as well as compost management strongly affected crop response and fate of N. Compost increased grain yield with no significant yield response to N fertilizer with the single compost application in Year 1 and the annual compost application in Year 3. Plant N uptake increased with N fertilizer rate, except in the 270 Mg ha-1 compost treatments in Year 1. Over the 3-yr period, NO-3 -N leaching with the 270 Mg ha-1 compost application was 1.8 times greater compared to that with the annual application. The estimated N mineralization ranged from 0 to 12% and 3 to 6% in the annual and single compost addition, respectively. Under the conditions of this study, annual compost application with reduced supplemental N fertilizer was the best management strategy to reach optimumcrop yield while minimizing N0-3 -N leaching losses.
- Subjects
COMPOSTING; CORN; FERTILIZERS; LEACHING; NITROGEN; SOIL pollution; MUNICIPAL solid waste incinerator residues
- Publication
Journal of Environmental Quality, 1999, Vol 28, Issue 4, p1074
- ISSN
0047-2425
- Publication type
Article
- DOI
10.2134/jeq1999.00472425002800040003x