EFFECT OF SALTS ON THE DENITRIFICATION PRODUCT RATIO IN SOILS

The effect of some salts (chlorides, sulfates, and carbonates) and the ir mixtures in different concentrations on the stages of the denitrifi cation process has been studied for three soil types (chernozem, seroz em, and dark chestnut soil). A high sensitivity to N2O-reductase was s hown. The first toxicity sequence of salts with respect to nitrous oxi de was given. The antagonism of salts with respect to denitrifying mic roorganisms in soil was established. The causes of predominant denitri fication in saline soils were discussed, with N2O formation as its fin al stage.