Nitrogen Availability And Plant Cover: The Importance Of Nitrogen Pools
Author(s)
C. Cruz, T. Dias, S. Matos, A. Tavares, D. Neto
& M.A. Martins-Loucao
Abstract
Nitrogen availability and plant cover:
the importance of nitrogen pools
C. Cruz, T. Dias, S. Matos, A. Tavares, D. Neto &
M. A. Martins-Lou@o
Centro de Ecologia e Biologia Vegetal - Dep. Biologia Vegetal,
Faculdade de Cizncias da Universidade de Lisboa, Portugal
Abstract
Despite its great importance to plants' response to changing environments, the
soil environment has received much less attention than that above ground. In
particular, patterns of nitrogen availability in the ecosystem have been studied in
only a few locations and circumstances. The forms of nitrogen most commonly
used by plants are nitrate (NO3-) and ammonium (NH~), which differ in terms of
mobility and assimilation by the plant. Soils differ in their concentrations of
NO< and NH~', which also change in response to environmental conditions:
temperature, water availability, soil microbial community or successional stages,
ecosystem recovery, etc.
In this work we first determined field nitrogen availability (NO; and N&'
concen
Keywords
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