ISSN:
1573-5036
Keywords:
Bacteria
;
Asymbiotic
;
N-fixers
;
Azotobacter
;
Clostridia
;
Straw
;
N-fixation
;
Nitrogenase
;
Nile delta soil
;
Environment
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The pattern of N2-ase activity in clay-loam soil of Nile Delta was determined. However, unamended soil showed somewhat low activity: an amount of 18–95 mg N2 fixed/kg soil/year was calculated. Addition of glucose greatly enhanced such activity and efficiencies of N2-fixation increased with decreasing carbon source concentration. Highest activities (800 n moles C2H4/gh−1) and efficiencies (18.06 mg N2/g glucose added) were reported in soil amended with 1% glucose, adjusted to 50% W.H.C. and incubated at 30°C. Enrichment of the soil with straw lead to a significant nitrogen gain particularly under water-logged conditions. During a short period of 16 days 5.8–9.3 mg N2 were fixed/g straw added at the latter conditions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02205924
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