SYMPOSIA PAPER Published: 01 January 1979
STP38145S

Nitrogen Transformations in Stream Sediments: N Studies

Source

Laboratory studies were carried out on sediment samples taken from a perennial stream draining an agronomic watershed. Columns of sediment were placed in acrylic plastic tubes, overlain with isotopically labeled nitrate, and incubated at 15°C. An optical emission spectrometer was used to determine the excess 15N in each of the NO3, NH4, and organic nitrogen fractions at various times. It was concluded that the previously observed loss of nitrate from aerated water overlying stream sediment was indeed the result of denitrification. It was also established that nitrification and denitrification were proceeding simultaneously and that less than 2 percent of the added labeled nitrogen was immobilized.

Author Information

Chatarpaul, L
Saskatchewan Institute of Pedology, University of Saskatchewan, Saskatoon, Ontario, Canada
Robinson, JB
Saskatchewan Institute of Pedology, University of Saskatchewan, Saskatoon, Ontario, Canada
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Details
Developed by Committee: D19
Pages: 119–127
DOI: 10.1520/STP38145S
ISBN-EB: 978-0-8031-5549-7
ISBN-13: 978-0-8031-0511-9