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C. Olsen, M. Mattsson, J. Schjoerring (1995)
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Barley (Hordeum vulgare L. cv. Golf) was grown in solution culture with controlled nitrogen availability in order to study the influence of nitrogen nutrition on ammonia emission from the leaves. Ammonia emission measured in cuvettes connected to an automatic NH3 monitor was close to zero for nitrate grown plants but increased to 0.9–1.3 nmol NH3 m-2 leaf area s-1 after 3–5 days of ammonium nutrition. Increasing concentrations from 0.5 to 10 mM NH4 + in the root medium increased NH3 emission from the shoots, root glutamine synthetase activity and NH4 + concentrations in apoplast, xylem sap and bulk tissue, while apoplastic pH values decreased.
Nutrient Cycling in Agroecosystems – Springer Journals
Published: Oct 22, 2004
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