The relative uptake by plants of the two ionic nitrogen (N) forms, ammonium (NH4+) and
nitrate (NO3−), has been the subject of much interest during the past 50 years, resulting in a …

The seasonal coupling of plant and soil microbial nutrient demands is crucial for efficient
ecosystem nutrient cycling and plant production, especially in strongly seasonal alpine …

The importance of organic nitrogen (N) for plant nutrition and productivity is increasingly
being recognized. Here we show that it is not only the availability in the soil that matters, but …

Although organic nitrogen (N) compounds are ubiquitous in soil solutions, their potential role
in plant N nutrition has been questioned. We performed a range of experiments on …

• Despite considerable attention over the last 25 yr, the importance of early protein
breakdown products to plant nitrogen (N) nutrition remains uncertain.• We used rhizosphere …

Background and aims To test the hypothesis that dominant plant species could acquire
different nitrogen (N) forms over a spatial scale and they also have the ability to compete for …

Leymus chinensis and Stipa grandis are two important plant species of temperate steppes in
Inner Mongolia of North China. They differ in their life forms, eg, L. chinensis is a type of …

Plant species generally absorb different nitrogen (N) forms from soil in ways that minimize N
niche overlap, but whether and how grazing affects a plant's preferred form of N remains …

Species-rich plant communities use nitrogen (N) more efficiently in grassland ecosystems;
however, the role of plant functional diversity in affecting community level plant N-use has …

The contribution of large molecular size organic nitrogen (N) to plant N uptake is unclear.
Soils with and without maize, at three pH levels, were treated with (carbon‐14 and‐13 (14C …