Data/hora: 14/06/2024 00:02:11

Provedor de dados: | 27
País: | Belgium
Título: | An experiment on the relative importance of denitrification, nitrate reduction and ammonification in coastal marine sediment
Autores: | Goeyens, L.; De Vries, R.T.P.; Bakker, J.F.; Helder, W.
Data: | 1987
Ano: | 1987
Palavras-chave: | Ammonia; Biogeochemical cycle; Coastal zone; Denitrification; Nitrates; Nitrogen cycle; Sediments.
Resumo: | Simultaneous determinations of &lt;sup&gt;15&lt;/sup&gt;N-nitrogen gas production, &lt;sup&gt;15&lt;/sup&gt;N-ammonia formation by nitrate reduction and ammonia production from organic nitrogen were carried out after addition of &lt;sup&gt;15&lt;/sup&gt;N-nitrate to anaerobically incubated sediment slurries from a location in the Dutch Wadden Sea. The rate of nitrogen gas production was 1.75 µmol N.cm&lt;sup&gt;-3&lt;/sup&gt; wet sediment.d&lt;sup&gt;-1&lt;/sup&gt;, nitrate reduction to ammonia occurred to a rate of 0.79 µmol N.cm &lt;sup&gt;-3&lt;/sup&gt;.d &lt;sup&gt;-1&lt;/sup&gt; and ammonification at 1.17 µmol N-cm &lt;sup&gt;-3&lt;/sup&gt;.d &lt;sup&gt;-1&lt;/sup&gt;. At the end of the incubation experiment (after 30 h) 63% of the originally added &lt;sup&gt;15&lt;/sup&gt;N-nitrate was present as nitrogen gas, 32% ended up as ammonia and ~ 4% as particulate organic nitrogen. Ammonia production by degradation of organic nitrogen compounds was the most important process in building up the ammonia pool in the anaerobic sediment incubation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3169
Fonte: | %3Ci%3ENeth.+J.+Sea+Res.+21%283%29%3C%2Fi%3E%3A+171-175
Fonte: | info:eu-repo/semantics/restrictedAccess