Nitrogen Fixation by Blue-Green Algal Soil Crusts in Nigerian Savanna

Simple item page
dc.contributor.authorIsichei, A. O.
dc.coverage.geographicalNigeriaen_US
dc.date.accessioned2014-03-13T10:04:48Z
dc.date.accessioned2018-10-29T11:00:27Z
dc.date.available2014-03-13T10:04:48Z
dc.date.available2018-10-29T11:00:27Z
dc.date.issued1980
dc.departmentBotanyen_US
dc.descriptionPart of this material, in different form, was presented at the Symposium on "The potentials for nitrogen fixation in the tropics", Rio de Janeiro, Brazil, 18-25 July, 1977: "Nitrogen fixation by soil algae of temperate and tropical soils' '. (Stewart, W.D.P., Sampaio, M.J., Isichei, A.O. & Sylvester- Bradley, R.).en_US
dc.description.abstractBlue-green algae, many of which are known to be nitrogen fixers, occur on the surface of the soil as crusts. Crusts are masses of algal filaments that grow on top of each other. These blue-green algal crusts were collected from all of the savanna zones of Nigeria in order to estimate the quantitative role they may play in the nitrogen economy of savanna ecosystems. Algae of the genus Scytonema, which are nitrogen fixers, were dominant in all the crust samples collected. Using the acetylene reduction assay, it was found that the crust samples fixed nitrogen 24 h after rewetting and were affected by pH, temperature, light and moisture variations. If sufficient light were available for near maximum photosynthesis, with an algal cover of the soil surface of about 30 % and mean to maximum-fixation during 70 %of the rainy season of 180 days of 10-hour day-length, from 3.3 to 9.2 kg ha-' yr-' of nitrogen would be fixed. This amount would replace much of the nitrogen lost from the grass standing crop as a result of annual burning of the savanna.en_US
dc.facultiesScienceen_US
dc.format.filetypePDFen_US
dc.identifier.citationIsichei, A. O. (1980). Nitrogen Fixation by Blue-Green Algal Soil Crusts in Nigerian Savanna. In: Rosswall, T. (ed.) Nitrogen Cycling in West African Ecosystems, pp. 191-198. Stockholm: Royal Swedish Academy of Science.en_US
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/3346
dc.language.isoenen_US
dc.pages.totalpages8en_US
dc.subjectBlue-green algaeen_US
dc.subjectScytonema myochrousen_US
dc.subjectAlgal crustsen_US
dc.subjectAtmospheric humidityen_US
dc.subjectSavanna ecosystemen_US
dc.subjectSoil crust algaeen_US
dc.titleNitrogen Fixation by Blue-Green Algal Soil Crusts in Nigerian Savannaen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Nitrogen Fixation by Blue-Green Algal Soil Crusts in Nigerian Savanna by Isichei, A. O..pdf
Size:
567.45 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Thumbnail Image
Name:
license.txt
Size:
0 B
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Botany-Journal Articles