Background Plants can utilize two major forms of inorganic N: NO3−(nitrate) and NH4+
(ammonium). In some cases, the preference of one form over another (denoted as β) can …

THE high incidence of failure when late-successional conifer species are replanted on
disturbed forest sites is a considerable problem1–3. Here we advance a hypothesis that …

THE importance of nitrate (NO–3) in the internal nitrogen cycle of undisturbed coniferous
ecosystems has not been widely recognized1, 2. Nitrate concentrations in soils from these …

Background Most terrestrial vascular plants can assimilate soil obtained NO3-in their root
and shoot. Scope Data from the literature are collated and analysed with respect to …

The depth and duration of snow pack is declining in the northeastern United States as a
result of warming air temperatures. Since snow insulates soil, a decreased snow pack can …

Conifers are considered to prefer to take up ammonium (NH4+) over nitrate (NO3−).
However, this conclusion is mainly based on hydroponic experiments that separate roots …

In terrestrial ecosystems, soil nutrient regimes at a plant's living site generally represent the
plant's “nutrition habitat”. Plant species frequently well adapt to their original “nutrition …

Abstract Effects of organic and inorganic nitrogen sources on growth and mineral nutrient
concentrations of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) …

由于NH+ 4-N 和NO-3-N 形态的差异, 二者对树木养分吸收和生长发育的影响不同.
树木常表现出对NH+ 4-N 和NO-3-N 的选择性吸收, 树种对NH4+-N 和NO-3-N …

Phenotypic plasticity and competitive strength are major mechanisms determining the
success of invasive species and are influenced by abiotic factors. A rise in the ratio of …