The effect of nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on nitrifying organism populations under <i>in vitro</i> conditions
- 1 Faculty of Science, Pontificia Universidad Javeriana, Bogotá, Colombia;
- 2 Faculty of Science, Pontificia Universidad Javeriana, Bogotá, Colombia;
- 3
- 4 Faculty of Agronomy, National University of Colombia, Carrera 30 No 45-03, Edificio 500, Bogotá, Colombia;
- 5 Faculty of Agronomy, National University of Colombia, Bogotá, Colombia
Abstract
The application of nitrification inhibitors is a technique to reduce the nitrate concentration on leachates that delay ammonium oxidation by reducing the activity of ammonium oxidizing bacteria in soils. Two experiments were carried out in order to estimate the influence of DMPP on the population of ammonium oxidization bacteria under in vitro conditions. In both experiments, three treatments were established. The treatments were the following: a) ammonium oxidization bacteria established in a growing media without fertilizers, b) ammonium oxidization bacteria established in a growing media with Urea, and c) ammonium oxidization bacteria established in a growing media with DMPP. Results obtained showed that the population of the ammonia oxidizing bacteria diminished in the DMPP treatment as compared with the urea and control treatments. In conclusion, DMMP influences on ammonium oxidization bacteria activity being a useful tool in fertilizers strategies to reduce the contamination by nitrates in groundwater.
- Fernandez-Escobar, R., Garcia-Novelo, J.M., Restrepo-Diaz, H. (2011) Mobilization of nitrogen in the olive bearing shoots after foliar application of urea. Scientia Horticulturae 127, 452-454.
- Sanchez, E.E., Khemira, H., Sugar, D., Righetti, T.L. (1995) Nitrogen management in orchards. In: Bacon, P.E. Ed., Nitrogen Fertilization in the Environment. Marcel Dekker, Inc., New York, 327–380.
- Giménez, C., Díaz, E., Rosado, F., García-Ferrer, A., Sánchez, M., Parra, M.A., Díaz, M., Pe?a, P. (2001) Characterization of current management practices with high risk of nitrate contamination in agricultural areas of southern Spain. Acta Horticulturae 563, 73–80.
- Marschner, H. (1995) Mineral Nutrition of Higher Plants. Academic Press Limited, London.
- Li, H., Liang X., Chen Y., Lian Y., Tian G., Ni W. (2008) Effect of nitrification inhibitor DMPP on nitrogen leaching, nitrifiying organism, and enzyme activities in a rice-oilseed rape system. Journal of environment Sciences. 20, 149-155. doi:10.1016/S1001-0742(08)60023-6.