Ecological problems of nitrogen rotation in the nature
2000
Slavov, D. (Institut po Tsvetarstvo, Negovan (Bulgaria))
The importance of the separate nitrogen rotation in the nature elements and their relation to the ecological processes are discussed in the present article. Small quantities of the atmospheric nitrogen are directly utilized by the plants as a nutrient, mainly through the nitrogen fixating bacteria. A greater significance for the nitrogen rotation has the technical assimilation of the atmospheric nitrogen at the production of nitrogen mineral fertilizers. Their production and utilization change the natural nitrogen rotation on the dry land, and increases the nitrogen emissions in the atmosphere due to gas shaped losses, and increases the risk of nitrates' content increase in the environment. The speed and the direction of the two processes: mobilization and immobilization, reflect on the nitrogen mineral forms contents. The domination of the mineralizing process leads to nitrate nitrogen emission in the soil, and this represents an ecological problem.
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