Title page for ETD etd-10142005-135808

Type of Document Dissertation
Author Li, Renssheng
URN etd-10142005-135808
Title Nitrogen cycling in young mine soils in Southwest Virginia
Degree PhD
Department Crop and Soil Environmental Sciences
Advisory Committee
Advisor Name Title
No Advisors Found
  • Soils Virginia Southwestern
  • Mines and mineral resources Virginia Southwestern
Date of Defense 1991-06-05
Availability restricted

Deficiency of available nitrogen (N) is one of the major factors limiting the establishment of a long term self-sustaining vegetative community on mine soils. This investigation was conducted to study the nature of N form and dynamics in southwest Virginia mine soils.

Fresh mine spoils contained a large amount of indigenous N, ranging from 650 to 2500 mg/kg soil, which complicated N studies. Most of the indigenous N was "geologic N" which was unavailable to plants. The geologic N came from either 2:1 silicate minerals (fixed NH4+) or coal fragments (nonhydrolyzable organic N). Active N, consisting of hydrolyzable organic N and exchangeable N, comprised the minor fraction of indigenous N available to plants.

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