Nitrogen effect

environnement.ensaia.u-nancy.fr Hayar at ensaia.u-nancy.fr
Mon Jun 22 12:24:16 EST 1998


Dear NewsGroup members,

Upon reviewing the literature, the use of nitrogen (as fertilizer e.g.
ammonium sulfate) may reduce the degradation of pesticides in soil (For
example : atrazine and 2,4-D  ; despite  that the last  one  doesn't
contain  N source).

Do you think that nitrogen can have a side effect on enzyme activity  ? or
only it induces or provokes a selectivity  inside the microbial population
? how it can affect the activity of  bacteria or fungi ?

In  case of the first hypothesis, in what way  nitrogen can effect or
suppress the activity of the enzyme ?

all suggestions and comments are well appreciated

Any related references would also be appreciated.

Please to mail directly to : hayar at ensaia.u-nancy.fr
I promise to make a synthesis of replies for the group.

Thank you very much

-- 
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M. Salem HAYAR
Ecole Nationale Superieure d'Agronomie et des Industries Alimentaires
2, avenue de la Foret de Haye
Laboratoire Sols et Environnement associe INRA, B.P. 172
54505 Vandoeuvre-Les-Nancy Cedex, FRANCE
Tel.: (+33) 03.83.59.59.59 poste 5107
Telecopie : (+33) 03.83.59.59.16
Mailto:hayar at ensaia.u-nancy.fr
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