Mineralization of nitrogen in the presence of a nitrification inhibitor

The influence of a nitrification inhibitor, dicyandiamide (DCD). on nitrogen processes was studied by incubation of soil with ammonium sulfate labelled with 15N. During the early days of the incubation, the amount of nitrate-N was higher in the control than in the treatment with DCD, but after 6 mon...

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Bibliographic Details
Published in:Soil biology & biochemistry 1989, Vol.21 (1), p.29-34
Main Authors: Guiraud, G., Marol, C., Thibaud, M.C.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Chemical, physicochemical, biochemical and biological properties
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Nitrogen fertilization
Nitrogen, phosphorus, potassium fertilizations
Physics, chemistry, biochemistry and biology of agricultural and forest soils
Soil science
Soil-plant relationships. Soil fertility. Fertilization. Amendments
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Summary:The influence of a nitrification inhibitor, dicyandiamide (DCD). on nitrogen processes was studied by incubation of soil with ammonium sulfate labelled with 15N. During the early days of the incubation, the amount of nitrate-N was higher in the control than in the treatment with DCD, but after 6 months, there was no significant difference. The decrease in nitric-N attributable to dicyandiamide, resulted from selective inhibition of the nitrification process. Moreover, an increase in the immobilization of the N from the labelled ammonium was observed, while the mineralization of N from the soil organic compartments was of similar magnitude in both treatments.
ISSN:0038-0717
1879-3428
DOI:10.1016/0038-0717(89)90006-0