Nitrogen Mineralization and Nitrification in Amended Colliery Spoils

Abstract

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Nitrogen status and transformations in coal mine spoil

“…Generally higher values of ammonium-N (> 10.0 mg kg-') were found in samples having pH values below 4.5. These results are in agreement with those reported by Williams and Cooper (1976). Nitrate-N was either undetectable or present at low levels ranging from 0 to 9.0 mg N kg-' spoil with a mean of 1.3 mg N kg-' and a median value of 0.7.…”

“…Although some studies (Fyles and McGill, 1987;Palmer and Chadwick, 1985;Palmer, et al, 1985;Reeder and Berg, 1977a, b;Voos and Sabey, 1987;Williams and Cooper, 1976) have been made on various parts of the nitrogen cycle, quantitative understanding of nitrogen transformations in coal mine spoils is limited. The aim of this study was to measure the occurrence and magnitude of nitrogen transformations in coal mine spoils by surveying a large number (90 samples) from sites throughout Central Scotland.…”

Nutrient Provision and Cycling in Soils in Urban Areas

“…Shah (1988) measured 0.5.\1 K~O... (Khan, 1987). Shah (1988) found the largest concentrations of NH 4 -N in the more acidic spoils, as did Williams & Cooper (1976) (Table 7.2).…”

Denitrification and nitrate-reducing bacterial populations in abandoned and reclaimed minesoils

“…This resulted in a net accumulation of NH~-and less Table 3). Low nitrification rates appear to be common in acidic minespoils [5,32,33], presumably due to inhibition of chemoautotrophic nitrifying bacteria by low soil pH [34]. Recent studies demonstrated heterotrophic fungi are potentially the important nitrifying microorganisms in low pH forest soils [35,36].…”