To determine the inhibiting effects of combined application of organic manures with inorganic fertilizers and combined application of organic manures with inorganic fertilizers and nitrification inhibitors on accumulation of nitrate and nitrites in vegetable plants, the red garden soil developed from the Quaternary red clay and the field plot experiment were carried out to study the pollution conditions of nitrate in garden soil ecosystem. The resuhs showed that the combined application of organic manures with inorganic fertilizers and nitrific...