Bioremediation of nitrate-contaminated shallow groundwater and effect of cropping systems on nitrous oxide emission /

Content Provider	Semantic Scholar
Author	Jacinthe, Pierre-André
Copyright Year	1995
Abstract	Periodically maintaining a high water table in the soil profile has been proposed as a strategy to remove excess nitrate (NO3-N) in subsurface soil environments. Laboratory and field investigations were carried out to evaluate the effectiveness and limitations of this strategy. Water table management (WTM) simulation experiments using undisturbed soil columns, in agreement with soil sample incubation studies, showed that, within a soil profile, most of the denitrification activity resides in the surface layers of soil. Thus, a high water table should provide the most favorable conditions to achieve meaningful removal of NO3-N from contaminated soils. Even under these circumstances, the process is slow, however, and generally proceeds at rates 2 to 7 times slower than determined from incubations of soil samples. This study indicates that, besides the physical and biochemical factors such as organic C, O2 and denitrifier population, time as a logistic factor would most likely limit the applicability and success of WTM strategies as a NQ3-N removal tool in cropland situations. Enhancing NO3-N removal by WTM results in increased
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Language	English
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Content Type	Text
Resource Type	Article