Comparison of The Efficiencies of Urea Nitrogen and Phosphoryl Triamide Nitrogen forLolium Multiflorumand Their Influence on the Soil Nitrogen Reserve
| Autor: | M. Chiriac, L. Calancea |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
endocrine system
Urea nitrogen biology Stable isotope ratio Soil nitrogen fungi Inorganic chemistry food and beverages chemistry.chemical_element Lolium multiflorum Vegetation urologic and male genital diseases biology.organism_classification Nitrogen Inorganic Chemistry chemistry.chemical_compound Animal science chemistry otorhinolaryngologic diseases Urea Environmental Chemistry Negative correlation General Environmental Science |
| Zdroj: | Isotopes in Environmental and Health Studies. 32:79-86 |
| ISSN: | 1477-2639 1025-6016 |
| DOI: | 10.1080/10256019608036295 |
| Popis: | 15N-Labelled phosphoryl triamide (PTA) was synthesized. Experiments with Lolium multiflorum plants in vegetation pots have shown that there are important differences between urea and PTA treatments. At high N rates, uptake of N by plants increased in both treatments and N uptake from the soil reserve decreased. The coefficient of N utilization by plants was higher in the urea than in the PTA treatments. However, at the highest N rate, the coefficient of N utilization by plants was higher in the PTA than in the urea treatment. A strong negative correlation was found between the rates applied and the decrease of N content in the soil reserve. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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