AGFD 117 |
| The influence of nitrogenous fertilizers and inhibitors of nitrification CMP (carbomoil methypyrazol), DCDA (dicyandiamide) and ATA (aminotriazol) were studied. The content of ammonium and nitrate nitrogen, mobile phosphorus and metabolic potassium was determined by different methods. Manuring by nitrogenous fertilizers during the cotton plant cultivation in serozems and fodder beet in meadow soil increased the cotton of ammonium and nitrate nitrogen. With the increase of dose of nitrogen fertilizers, the cotton of these nutrients is increased also. The use of inhibitors of nitrification significantly decreases the activity of nitrification process. In the result of which, the transition of ammonium nitrogen into nitrate in the soil is slowing down, that results to the decrease of nitrate content and ineraese of ammonium nitrogen. The inhibition of nitrification process during the introduction of inhibitors of nitrification continues during 20-30 days. At the end of vegetation of cotton plant and beet, the decrease of the content of nitrates during the introduction of nitrification inhibitors was not observed, but on the contrary some increase of nitrate content in the soil was observed. On the bases of our investigations according to the olegree of inhibition of process of nitrification, the inhibitors can be peased in the following order: CMP>ATA>DCDA. During the manuring by nitrogenous fertilizers, some increase of the content of mobile phosphorus and metabolic potassium is observed. And with the increase of a dose of nitrogen fertilizers, the content of these mobile nutrients is increased. At the beginning the introduction of inhibitors of nitrification decreases the content of mobile phosphorus, then when then inhibition action gets slowly, the content of mobile phosphorus in these variants is increased. These show that the content of mobile phosphorus to some extent depends from activity of nitrification process |
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General Posters
1:00 PM-3:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Poster
Division of Agricultural & Food Chemistry |