Premium
Side Effects of Acetylene on the Conversion of Nitrate in Soil
Author(s) -
Haider K.,
Mosier A. R.,
Heinemeyer O.
Publication year - 1983
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19831460510
Subject(s) - acetylene , denitrification , mineralization (soil science) , chemistry , nitrate , carbon fibers , environmental chemistry , carbon 14 , carbon dioxide , inorganic chemistry , nuclear chemistry , nitrogen , organic chemistry , materials science , physics , quantum mechanics , composite number , composite material
Laboratory studies were conducted to determine if acetylene affects the rate of NO 3 − reduction to N 2 O and N 2 , if C 2 H 2 ist anaerobically metabolized in the presence of nitrate, and if C 2 H 2 affects soil carbon metabolism. These studies in water saturated soil, incubated under air or N 2 atmosphere, with or without acetone‐free acetylene, show that C 2 H 2 can accelerate NO 3 − reduction. Acetylene inhibited carbon mineralization when NO 3 − was limited but accelerated it when sufficient NO 3 − was available. After three days, only two per cent or less of the added C 2 H 2 was directly oxidized to CO 2 , however, up to 28 % of the added C 2 H 2 carbon remained in the soil. The residual C 2 H 2 carbon was oxidized aerobically and anaerobically when NO 3 − was added. These data suggest that when C 2 H 2 is used in denitrification studies, the results must be carefully scrutinized. Once a soil is exposed to C 2 H 2 it should not be used again soon to assess denitrification.