منابع مشابه
Nitrogen Fixation
Plant growth is directly dependent upon an adequate supply of fixed nitrogen. Water and fixed nitrogen are the most common limiting factors for plant growth.There is an abundance of nitrogen in the atmosphere, but it is in the form of the relatively inert gas, N2, and this must be converted chemically or biologically into a more active form before plants can utilize it. Chemical fixation most c...
متن کاملCyanobacterial Nitrogen Fixation (CYANOFIX)
The European Science Foundation acts as a catalyst for the development of science by bringing together leading scientists and funding agencies to debate, plan and implement pan-European initiatives. This ESF programme builds on the longstanding European research tradition in cyanobacterial nitrogen fixation. It is, however, the first coordinated European interdisciplinary programme in the field...
متن کاملSymbiotic Nitrogen Fixation.
Biosphere nitrogen is subjected to rapid turnover, and because it is eventually lost as nitrogen into the atmosphere, its maintenance requires continuous replenishment with reduced nitrogen from atmospheric nitrogen. Biological reduction of nitrogen to ammonia can be performed only by some prokaryotes and is a highly oxygen-sensitive process. The most efficient nitrogen fixers establish a symbi...
متن کاملNitrogen fixation in ruminants.
The amount of nitrogen gas (N2) available for microbial protein synthesis via nitrogen fixation in the rumen was estimated. Measurements were made of nitrogen fixation by ruminal ingesta from goats fed low protein rations for a prolonged period of time, and by ingesta from sheep fed high protein rations. Nitrogen fixation by rumen microorganisms incubated for 30 or 180 min in vitro was measured...
متن کاملNitrogen fixation and temperature
Physiological constraints on the global distribution of Trichodesmium – effect of temperature on diazotrophy E. Breitbarth, A. Oschlies, and J. LaRoche Leibniz-Institute of Marine Sciences, IFM-GEOMAR, Düsternbrooker Weg 20, 24105 Kiel, Germany National Oceanography Centre, Southampton, European Way, Southampton, SO14 3ZH, UK now at: Department of Chemistry, Analytical and Marine Chemistry, Göt...
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ژورنال
عنوان ژورنال: Nature
سال: 1975
ISSN: 0028-0836,1476-4687
DOI: 10.1038/255008c0