- Soil microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus exhausting soil fertility and reducing agricultural productivity.Without denitrification, earth's nitrogen supply would eventually accumulate in the oceans, since nitrates are highly soluble and are continuously leached from the soil into nearby bodies of water. See also nitrifying bacteria.
* * *microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity. Thiobacillus denitrificans, Micrococcus denitrificans, and some species of Serratia, Pseudomonas, and Achromobacter are implicated as denitrifiers. Pseudomonas aeruginosa can, under anaerobic conditions (as in swampy or water-logged soils), reduce the amount of fixed nitrogen (as fertilizer) by up to 50 percent. Without denitrification, however, the Earth's supply of nitrogen would eventually accumulate in the oceans, since nitrates are highly soluble and are continuously leached from the soil into nearby bodies of water. See also nitrogen cycle.
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Denitrifying bacteria — form a necessary part of the process known as denitrification as part of the nitrogen cycle, their primary purpose being to metabolise nitrogenous compounds, with the assistance of the nitrase reductase enzyme, to turn oxides back to nitrogen gas … Wikipedia
denitrifying bacteria — n pl various bacteria (as Thiobacillus denitrificans and Paracoccus denitrificans) that bring about denitrification used esp. of forms that reduce nitrates to nitrites or nitrites to nitrogen gas (as many common putrefactive organisms of manure… … Medical dictionary
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denitrifying bacteria — noun plural : various bacteria that bring about denitrification used especially of forms that reduce nitrates to nitrites or nitrites to nitrogen gas (as many common putrefactive organisms of manure and soil); see achromobacter … Useful english dictionary
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Nitrifying bacteria — are chemoautotrophic or chemolithotrophs depending on the genera (Nitrosomonas, Nitrosococcus, Nitrobacter, Nitrococcus) bacteria that grow by consuming inorganic nitrogen compounds. Many species of nitrifying bacteria have complex internal… … Wikipedia
nitrifying bacteria — Small group of oxygen requiring bacteria that use nitrogen as an energy source. These microorganisms are important in the nitrogen cycle as converters of soil ammonia to nitrates, compounds usable by plants. The nitrification process requires two … Universalium
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