Nitrogen mineralization rates of soils amended with nontraditional organic wastes

B. F. Rogers, U. Krogmann, L. S. Boyles

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Nitrogen mineralization rate (NMR) studies provide a means to determine plant-available N resulting from organic waste applications. Nontraditional organic wastes (food processing and yard wastes) were applied at two different rates (112 kg N ha-1 and 224 kg N ha-1) to soils from two different soil series, Adelphia sandy clay loam (Aquic Hapludults) and Sassafras sandy loam (Typic Hapludults) in a 25-week laboratory incubation study. Supplemental ammonium sulfate was added to the soils amended with wastes with high C/N ratios. Nitrogen mineralization rates were reported as the percent organic N mineralized from organic waste. The NMR ranges for the vegetable food processing wastes were 13.9 to 55.1% (Adelphia soil) and 17.0 to 66.8% (Sassafras soil); for the other food processing wastes: -20.8 to 39.9% (Adelphia soil) and -20.5 to 47.7% (Sassafras soil); and for the yard wastes: -26.7 to 29.8% (Adelphia soil) and -22.6 to 65.6% (Sassafras soil). The application rates of the wastes and the two soil types affected the NMRs of several of the organic wastes studied significantly (P < 0.05). The effect of waste characteristics and soil type on NMRs needs to be accounted for if organic wastes are to be used as a N source. One option is to apply organic wastes at rates below agronomic recommendation rates, based on NMRs, and to supply additional inorganic N as needed.

Original languageEnglish (US)
Pages (from-to)353-363
Number of pages11
JournalSoil Science
Volume166
Issue number5
DOIs
StatePublished - 2001

All Science Journal Classification (ASJC) codes

  • Soil Science

Keywords

  • Food processing wastes
  • Laboratory incubation
  • Nitrogen mineralization rates
  • Yard wastes

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